This question already has answers here:
Spring JSF integration: how to inject a Spring component/service in JSF managed bean?
(4 answers)
Closed 6 years ago.
What I have is a simple hello world application utilizing JSF and Spring with Maven. Whenever I call on my BO (business object) from within my Managed Bean the BO is always null. I am not sure what I am missing or not understanding.
HelloWorldMB.java
package com.project.web;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import tech.calvanodesign.business.HelloWorldBo;
import java.io.Serializable;
#ManagedBean
#SessionScoped
public class HelloWorldMB implements Serializable {
public HelloWorldBo helloWorldBo;
private static final long serialVersionUID = 1L;
private String name;
public void init () {
System.out.println("HelloWorldMB.init()");
if (helloWorldBo != null)
return;
System.out.println("helloWorldBo is null");
}
public String springTest() {
// Call the business object to register the user
helloWorldBo.springTest(name);
return "";
}
// Set the registrationBo attribute used by Spring
public void setHelloWorldBo(HelloWorldBo helloWorldBo) {
this.helloWorldBo = helloWorldBo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
welcome.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>JSF 2.0 Hello World</title>
<h:outputStylesheet library="css" name="style.css" />
</h:head>
<h:body>
<h:form>
<p:growl id="growl" showDetail="true" sticky="true" />
<p:inputText id="intxtSpringTest" value="#{helloWorldMB.name}"/>
<p:commandButton id="cmdbtnSpringTest" value="Test Spring 3 with JSF" action="#{helloWorldMB.springTest}" ajax="false"/>
</p:panel>
</h:form>
</h:body>
HelloWorldBo.java
package com.project.business;
public interface HelloWorldBo {
/**
* springTest method
* #param name
*/
public void springTest(String name);
}
HelloWorldBoImpl
package com.project.business;
public class HelloWorldBoImpl implements HelloWorldBo {
/**
* Tests the spring and jsf implementation
*/
#Override
public void springTest(String name) {
System.out.println("HelloWorldBoImpl:: springTest : " + name);
}
}
faces-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
version="2.2">
<application>
<el-resolver>
org.springframework.web.jsf.el.SpringBeanFacesELResolver
</el-resolver>
</application>
</faces-config>
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>tech.calvanodesign</groupId>
<artifactId>calvanodesignsource</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>calvanodesignsource Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.1.7</version>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.1.7</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>6.0</version>
</dependency>
<!-- spring-context which provides core functionality -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
</dependencies>
<build>
<finalName>calvanodesignsource</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
https://github.com/Epooch/CalvanoDesignSource
The source for those who want to see the whole application as it is on my machine.
The code blocks will remain as it was for those who run into the issues. I will post below it the changes that I had made to make it work.
Working Solution
HelloWorldMB
package com.project.web;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.faces.context.FacesContext;
import com.project.business.HelloWorldBo;
import java.io.Serializable;
#ManagedBean
#SessionScoped
public class HelloWorldMB implements Serializable {
#ManagedProperty(value = "#{helloWorldBo}")
private HelloWorldBo helloWorldBo;
private static final long serialVersionUID = 1L;
private String name;
public void init () {
System.out.println("HelloWorldMB.init()");
if (helloWorldBo != null)
return;
System.out.println("helloWorldBo is null");
}
public void springTest(ActionEvent e) {
// Call the business object to register the user
helloWorldBo.springTest(name);
}
// Set the registrationBo attribute used by Spring
public void setHelloWorldBo(HelloWorldBo helloWorldBo) {
this.helloWorldBo = helloWorldBo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
HelloWorldBo
package com.project.business;
public interface HelloWorldBo {
/**
* springTest method
* #param name
*/
public void springTest(String name);
}
HelloWorldBoImpl
package com.project.business;
import javax.inject.Named;
#Named("helloWorldBo")
public class HelloWorldBoImpl implements HelloWorldBo {
/**
* Tests the spring and jsf implementation
*/
#Override
public void springTest(String name) {
System.out.println("HelloWorldBoImpl:: springTest : " + name);
}
}
Added the following dependency to the pom.xml
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
If you expect Spring to inject the business object, you will have to provide JSF with some way to resolve the bean references. Your managed bean must initialize the business object somewhere in a method that will be invoked during the JSF lifecycle.
For example, here are the relevant sections from a simple example.
First, you need the Spring setup in the web application descriptors:
/WEB-INF/web.xml
<web-app>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/app-service-config.xml
</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>
/WEB-INF/app-service-config.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- Spring 3.1 annotation support -->
<context:component-scan base-package="com.rtt.simple.service" />
Then you need to set up JSF with a resolver that lets it inject Spring beans in its managed beans.
faces-config.xml
<application>
<!-- Spring Framework support -->
<el-resolver>
org.springframework.web.jsf.el.SpringBeanFacesELResolver
</el-resolver>
Then, you can inject a Spring bean in a managed bean:
DummyBackingBean.java
#ManagedBean
#ViewScoped
public class DummyBackingBean implements Serializable {
#ManagedProperty(value = "#{dummyService}")
private DummyService dummyService;
private List<DummyDataItem> dataItems;
#PostConstruct
public void postConstruct() {
LOG.trace("postConstruct()");
dataItems = dummyService.listAll();
}
public DummyService getDummyService() {
return dummyService;
}
public void setDummyService(DummyService dummyService) {
this.dummyService = dummyService;
}
DummyService.java
package com.rtt.simple.service;
import javax.inject.Named;
import com.rtt.simple.domain.DummyDataItem;
#Named("dummyService")
public class DummyService {
private static List<DummyDataItem> dataItems;
public List<DummyDataItem> listAll() {
return dataItems;
}
static {
dataItems = new ArrayList<DummyDataItem>();
// Initialize the dataItems list with static data
Note that I've used the #Named annotation from javax.inject to declare the bean in the Spring configuration, but this technique will work with any Spring injection annotation.
Related
here, whenever I trying to access or call the DAO method (which is written in #Repository class) in the JSP page in My spring MVC Project using Hibernate, it showing NullPointerException.
it works fine when I accessing this method in Controller class, it just throwing an exception in the JSP page.
and here expection i am getting,
SEVERE: Servlet.service() for servlet [jsp] threw exception
java.lang.NullPointerException
at com.lms.service.BookDetailsServiceImpl.getBookStatusForLibrarianById(BookDetailsServiceImpl.java:62)
here is my code,
in pom.xml,
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.libmansystem</groupId>
<artifactId>LibraryManagementSystems</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<name>LibraryManagementSystems Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<springframework.version>5.0.2.RELEASE</springframework.version>
<springsecurity.version>5.0.0.RELEASE</springsecurity.version>
<hibernate.version>5.4.14.Final</hibernate.version>
<mysql.connector.version>8.0.20</mysql.connector.version>
<c3po.version>0.9.5.5</c3po.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<!-- Spring MVC support -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- Spring Transactions -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- Spring ORM -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${springframework.version}</version>
</dependency>
<!-- Hibernate Core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<!-- Add MySQL and C3P0 support -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.connector.version}</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>${c3po.version}</version>
</dependency>
<!-- Servlet, JSP and JSTL support -->
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>1.2</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>LibraryManagementSystems</finalName>
<pluginManagement>
<plugins>
<plugin>
<!-- Add maven co-ordinates for : maven-war-plugin -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.3</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
entity class,
#Entity
#Table(name = "book_status_forlibrarian")
public class BookStatusForLibrarian {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "s_id")
private Integer id;
#Column(name = "status")
private String status;
public BookStatusForLibrarian() {
}
public BookStatusForLibrarian(Integer id, String status) {
this.id = id;
this.status = status;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
#Override
public String toString() {
return "BookStatusForLibrarian [id=" + id + ", status=" + status + "]";
}
}
Dao interface and class,
public interface BookDetailsDAO {
public BookStatusForLibrarian getBookStatusForLibrarianById(int statusId);
}
#Repository
public class BookDetailsDAOImpl implements BookDetailsDAO{
private SessionFactory sessionFactory;
#Autowired
public BookDetailsDAOImpl(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public BookDetailsDAOImpl()
{
}
#Override
public BookStatusForLibrarian getBookStatusForLibrarianById(int statusId) {
Session theSession = sessionFactory.getCurrentSession();
BookStatusForLibrarian theBookStatusForLibrarian = theSession.get(BookStatusForLibrarian.class, statusId);
return theBookStatusForLibrarian;
}
}
my service interface and class,
public interface BookDetailsService {
public BookStatusForLibrarian getBookStatusForLibrarianById(int statusId);
}
#Service
public class BookDetailsServiceImpl implements BookDetailsService {
#Autowired
BookDetailsDAO theBookDetailsDAO;
#Override
#Transactional
public BookStatusForLibrarian getBookStatusForLibrarianById(int statusId) {
System.out.println("inside service ");
return theBookDetailsDAO.getBookStatusForLibrarianById(statusId);
}
}
my controller,
#Controller
public class HomePageController {
#GetMapping("/homepage")
public String getHomePage()
{
return "homepage";
}
}
in my JSP page I am getting exception,
/WEB-INF/view/homepage.jsp,
<%#page import="com.lms.service.NonServiceMethod"%>
<%#page import="com.lms.dao.BookDetailsDAOImpl"%>
<%#page import="com.lms.service.BookDetailsServiceImpl"%>
<%#page import="com.lms.service.BookDetailsService"%>
<%#page import="com.lms.entity.BookStatusForLibrarian"%>
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%# taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%# page isELIgnored="false"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Show All Book</title>
</head>
<body>
<%
System.out.println("getting exception while calling Spring DAO method (which is written in #Repository class) in JSP page");
BookDetailsServiceImpl theBookDetailsService = new BookDetailsServiceImpl();
BookStatusForLibrarian getBookStatus= theBookDetailsService.getBookStatusForLibrarianById(3);
%>
</body>
</html>
and here expection i am getting,
SEVERE: Servlet.service() for servlet [jsp] threw exception
java.lang.NullPointerException
at com.lms.service.BookDetailsServiceImpl.getBookStatusForLibrarianById(BookDetailsServiceImpl.java:62)
please help me.
If you create the service in the JSP, it is not a Spring bean. There is no dependency injection done by Spring, you DAO is not injected in your service (NullPointerException). The correct way to pass the model (BookStatusForLibrarian) into the view (JSP) is to use the Controller.
#Controller
public class HomePageController {
#Autowired
BookDetailsService bookDetailsService;
#GetMapping("/homepage")
public String getHomePage(Model model) {
BookStatusForLibrarian bookStatus = bookDetailsService.getBookStatusForLibrarianById(3);
model.addAttribute("bookStatus", bookStatus);
return "homepage";
}
}
Then you can use bookStatus directly in the JSP without <% %> just like this: ${bookStatus.id}
I have a spring boot basic application
package com.meenakshi.fileupload;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Example {
public static void main(String[] args) throws Exception {
SpringApplication.run(Example.class, args);
}
}
My controller is
package com.meenakshi.fileupload.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
#Controller
public class IndexController {
#RequestMapping("/")
public String index() {
System.out.print("REDIRECTED BY MEENAKSHI");
return "index";
}
}
My index.html is a basic html file in src/main/resources/public folder
My pom.xml is
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>myproject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<!-- Additional lines to be added here... -->
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
When I do localhost:8080 I expect to redirect to index.html but I am getting Whitelabel Error Page
When I add thymeleaf dependency and add xmlns:th="http://www.thymeleaf.org" in .html it works
How to resolve it? Also what is the default view resolver in Spring Boot? Do I compulsorily need to use thymeleaf?
Also, do I need to add something to application.properties
There are couple of ways you can expose your index.html.
The way I like the most is doing the following:
#Configuration
public class WebMvcConfiguration extends WebMvcConfigurerAdapter {
#Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("index.html");
registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
}
}
It will automatically grab your index.html and create a default view controller to serve it.
Another way is doing like you did but returning ModelAndView like the following but it suit a Thymeleaf/JSP more then a SPA:
#Controller
#RequestMapping("/")
public class DefaultController {
#GetMapping("/")
public ModelAndView index() {
IndexModel indexModel = new IndexModel();
return new ModelAndView("index", "index", indexModel);
}
}
I am new to JAX-RS. I am doing CRUD operation using JAX_RS. CRUD operation is working fine for JSF but when I call fetchAll() method present in Service layer using JAX-RS I am getting a NullPointerException.
Below is my JAX_RS code
package com.resource;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import com.neorays.resource.entity.Person;
import com.neorays.resource.service.PersonService;
#Path("/persons")
public class MyResource {
PersonService ser = new PersonService();
#GET
#Path("/pers")
#Produces(MediaType.APPLICATION_JSON)
public List<Person> getAllPerson() {
List<Person> list = null;
try {
list = ser.fetchAll();
for (Person person : list) {
person.getId();
System.out.println("person id is" + person.getId());
System.out.println("person name is" + person.getName());
System.out.println("person country is" + person.getCountry());
}
} catch (NullPointerException ne) {
System.out.println("null pt is occuring" + ne);
}
return list;
}
}
This is my Service Layer
package com.resource.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.neorays.resource.bean.PersonBean;
import com.neorays.resource.dao.PersonDao;
import com.neorays.resource.entity.Person;
#Component
#Transactional
public class PersonService
{
#Autowired
private PersonDao dao;
#Transactional
public List<Person> fetchAll()
{
return dao.fetchAll();
}
}
This is my DAO layer
package com.resource.dao;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.hibernate.classic.Session;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.neorays.resource.bean.PersonBean;
import com.neorays.resource.entity.Person;
#Repository
public class PersonDao
{
#Autowired
private SessionFactory sessionFactory;
public List<Person> fetchAll()
{
Session ses = sessionFactory.getCurrentSession();
String query="from Person";
Query query2 =ses.createQuery(query);
List<Person> list = query2.list();
return list;
}
}
This is my web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<!-- needed for ContextLoaderListener -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- Bootstraps the root web application context before servlet initialization -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.neorays.resource</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webapi/*</url-pattern>
</servlet-mapping>
</web-app>
This is my pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.resource</groupId>
<artifactId>jsf_jaxrs</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<finalName>jsf_jaxrs</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<!-- uncomment this to get JSON support -->
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.10.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.26</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.2.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.2.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.faces</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>el-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.10.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.2.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.2.0.Final</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<properties>
<jersey.version>2.16</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
Finally, this is my Bean
package com.neorays.resource.entity;
import java.io.Serializable;
import javax.persistence.*;
import javax.xml.bind.annotation.XmlRootElement;
#XmlRootElement
#Entity
#NamedQuery(name="Person.findAll", query="SELECT p FROM Person p")
public class Person implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private String country;
private String name;
public Person() {
}
public Person(int id, String country, String name) {
super();
this.id = id;
this.country = country;
this.name = name;
}
#Id
public int getId() {
return this.id;
}
public void setId(int id) {
this.id = id;
}
public String getCountry() {
return this.country;
}
public void setCountry(String country) {
this.country = country;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
}
Your dependency injection is not constructed correctly. All of your beans must be created by Spring. If your applicationContext.xml file scan necessary packages (for services and daos at least), and if your hibernate session factory created correctly and since you already tell jersey to scan package for rest services this should work.
#Component
#Path("/persons")
public class MyResource {
#Autowired
PersonService ser;
...
}
Update
I just realise package name in web.xml and your rest service are different.
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
....
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.resource</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webapi/*</url-pattern>
</servlet-mapping>
....
</web-app>
If jersey-spring3 is missing in your class path you can add it using maven.
<dependency>
<groupId>org.glassfish.jersey.ext</groupId>
<artifactId>jersey-spring3</artifactId>
<version>${jersey.version}</version>
</dependency>
You can find additional info on jersey documentation.
This question already has answers here:
Difference between <context:annotation-config> and <context:component-scan>
(15 answers)
Closed 3 years ago.
I've tested the behavior of auto wiring in case the context:annotation-config element is missing in the application context xml file. To my surprise it worked just the same.
So here is my question:
How come an AutowiredAnnotationBeanPostProcessor is registered in the ApplicationContext even though the context:annotation-config element is missing from the application context configuration file, or what else mechanism makes this configuration work?
I'm using Spring version 3.0.6.RELEASE
This is the project pom file:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven- v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework.samples.spring</groupId>
<artifactId>spring-utility</artifactId>
<version>1.0.0.CI-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Spring Utility</name>
<url>http://www.springframework.org</url>
<description>
<![CDATA[
This project is a minimal jar utility with Spring configuration.
]]>
</description>
<properties>
<maven.test.failure.ignore>true</maven.test.failure.ignore>
<spring.framework.version>3.0.6.RELEASE</spring.framework.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.framework.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.framework.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
This is the application context configuration file, with the context:annotation-config element commented out:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<description>Example configuration to get you started.</description>
<!-- context:annotation-config/ -->
<context:component-scan base-package="com.foo.ch04" />
</beans>
A MessageProvider, that will be used as collaborator by a dependent bean MessageRenderer
package com.foo.ch04.helloworld;
import org.springframework.stereotype.Service;
#Service("messageProvider")
public class HelloWorldMessageProvider implements MessageProvider {
public String getMessage() {
return "Hello, World!";
}
}
The MessageRenderer, whose dependency messageProvider gets auto-injected:
package com.foo.ch04.helloworld;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
#Service("messageRenderer")
public class StandardOutMessageRenderer implements MessageRenderer {
private MessageProvider messageProvider;
public void render() {
if (messageProvider == null) {
throw new RuntimeException(
"You must set the property messageProvider before rendering message.");
}
System.out.println(messageProvider.getMessage());
}
#Autowired
public void setMessageProvider(MessageProvider provider) {
messageProvider = provider;
}
public MessageProvider getMessageProvider() {
return messageProvider;
}
}
The test application loading the application context and testing the messageRenderer:
package com.foo.ch04.helloworld;
import org.springframework.context.support.GenericXmlApplicationContext;
public class DeclareSpringComponents {
public static void main(String[] args) {
GenericXmlApplicationContext context = new GenericXmlApplicationContext();
context.load("classpath:META-INF/spring/app-context-annotation.xml");
context.refresh();
MessageRenderer renderer = context.getBean("messageRenderer",
MessageRenderer.class);
renderer.render();
}
}
Even though the is missing in the application context configuration file, the message "Hello, World!" is written to stdout when the application is run.
The use of <context:component-scan /> implies annotation based configuration and as such specifying <context:annotation-config/> is redundant.
'context:annotation-config' This annotation-config tag is used to process the auto wired beans declared in the application context XML file. If the auto wired bean could be discovered using the scope of 'context:component-scan' tag then no need to use 'context:annotation-config' tag
I'm getting started with Spring DI, but I'm struggling with dependency injection and the worse part is that I'm not even sure why as it seems ok to me. Hopefully you guys can help me out!
The problem is that a property annotated as #Autowired is always null
I've got a few projects with Maven structure:
com.diegotutor.lessondeliver
com.diegotutor.utility
I'm running the examples over Tomcat 7
I'm using the following dependencies in my pom.xml:
spring-context 3.2.4
spring-web 3.2.4
jersey-server 1.17.1
jersey-core 1.17.1
jersey-servlet 1.17.1
The simple idea is to have a RESTful service that through Dependency Injection is able to print out the value of a property located in a config file located at: D:\configuracion.conf.
At com.diegotutor.utility I have the following interface:
package com.diegotutor.utility;
public interface ConfigService {
public String getProperty(final String propertyName);
}
Implemented by:
package com.diegotutor.utility.impl;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Properties;
import com.diegotutor.utility.ConfigService;
public class PropertyFileConfigService implements ConfigService{
Properties prop;
public PropertyFileConfigService (final InputStream input) throws IOException {
if(input == null) {
throw new IllegalArgumentException("Input stream can't be null");
}
prop = new Properties();
prop.load(input);
}
public PropertyFileConfigService (final String fileName) throws IOException {
final FileInputStream input = new FileInputStream(fileName);
prop = new Properties();
prop.load(input);
}
public PropertyFileConfigService(final Reader input) throws IOException {
prop = new Properties();
prop.load(input);
}
public String getProperty(final String propertyName) {
return prop.getProperty(propertyName);
}
}
And at com.diegotutor.lessondeliver I have the RESTful service where I would like to use an injected instance of the ConfigService:
package com.diegotutor.lessondeliver;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.diegotutor.utility.ConfigService;
#Path("/")
#Component
public class HelloWorld {
private static final Log log = LogFactory.getLog(HelloWorld.class);
#Autowired
private ConfigService configService;
#Path("/helloworld")
#GET
#Produces(MediaType.TEXT_PLAIN)
public String getHello() {
String host = configService.getProperty("host");
return "Hello World! HOST" + host;
// configService IS NULL!!
//SO IT THROWS A NULLPOINTER EXCEPTION WHEN INVOKING getProperty ON IT
}
}
Finally at /com.diegotutor.lessondeliver/src/main/webapp/WEB-INF/service-beans.xml I have the following XML application context file, where I use the implementation of ConfigService (PropertyFileConfigService) injecting on it the path for the configuration file to read:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="configService" class="com.diegotutor.utility.impl.PropertyFileConfigService">
<constructor-arg type="java.lang.String"
value="D:\configuracion.conf" />
</bean>
<context:component-scan base-package="com.diegotutor" />
</beans>
Obviously I have specified in the web.xml of this com.diegotutor.lessondeliver web app that I want service-beans.xml as ConfigLocation and a listener ContextLoaderListener, and the RESTful service relies on ServletContainer
If I'm specifying context:component-scan to look for Components in com.diegotutor as suggested here and I'm forcing object creation through Spring by not using any new Statement as suggested here, Why am I getting the annotated configService as null? Why Spring is unable to inject an instance of com.diegotutor.utility.impl.PropertyFileConfigService?
Any help will be much appreciated!
Thank you
EDITED:
As requested, my web.xml is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>com.diegotutor.lessondeliver</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/service-beans.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>jersey-servlet</servlet-name>
<servlet-class>
com.sun.jersey.spi.container.servlet.ServletContainer
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey-servlet</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
You were right!
It seems that the problem is that Jersey is totally unaware of Spring and instantiates its own object. In order to make Jersey aware of Spring object creations (through dependency injection) I had to integrate Spring + Jersey.
To integrate:
Add maven dependencies
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-spring</artifactId>
<version>1.17.1</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</exclusion>
</exclusions>
</dependency>
Use SpringServlet for jersey-servlet in web.xml
<servlet>
<servlet-name>jersey-servlet</servlet-name>
<servlet-class>
com.sun.jersey.spi.spring.container.servlet.SpringServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
Now the #Autowired works properly and the object is not null anymore.
I'm a little bit confused about the exclusions I have to use in maven when using jersey-spring dependency, but that's another issue :)
Thank you!
Integration Spring with Jersey 2 (org.glassfish.*):
Maven
Some dependencies may be unnecessary, please check & clear it after things got working.
<properties>
<jersey.version>2.5</jersey.version>
</properties>
<!-- Jersey -->
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<!-- if your container implements Servlet API older than 3.0, use "jersey-container-servlet-core" -->
<artifactId>jersey-container-servlet</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.test-framework.providers</groupId>
<artifactId>jersey-test-framework-provider-inmemory</artifactId>
<version>${jersey.version}</version>
</dependency>
<!-- Jersey + Spring -->
<dependency>
<groupId>org.glassfish.jersey.ext</groupId>
<artifactId>jersey-spring3</artifactId>
<version>${jersey.version}</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</exclusion>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</exclusion>
</exclusions>
</dependency>
web.xml
<servlet>
<servlet-name>my-rest-service</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>my.package.with.rest.services</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>my-rest-service</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
applicationContext.xml
During the Spring upgrading I had to move it from /main/webapp/WEB-INF/ to /main/resources/ (details).
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<context:annotation-config />
<context:component-scan base-package="my.package.with.rest.services" />
</beans>
Example REST service
public interface MyService
{
String work(String s);
}
...
#Service
public class MyServiceImpl implements MyService
{
#Override
public String work(String s)
{
return "Hello, " + s;
}
}
...
#Path("demo/")
#Component
public class DemoRestService
{
#Autowired
private MyService service;
#GET
#Path("test")
public Response test(#FormParam("param") String par)
{
try
{
String entity = service.work(par);
return Response.ok(entity).build();
}
catch (Exception e)
{
e.printStackTrace();
return Response.status(Status.INTERNAL_SERVER_ERROR).entity("Epic REST Failure").build();
}
}
}
or you can simply extend SpringBeanAutoWiringSupport class. Like this: public class DemoRestService extends SpringBeanAutoWiringSupport. By extending this support class, properties of your service class can be auto-wired.
Another possible option is to manually invoke autowiring in your jersey resource:
#Context
private ServletContext servletContext;
#PostConstruct
public void init() {
SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, servletContext);
}
Hmm, you get a "manual autowiring"...