application.yml
spring:
mvc.view:
prefix: /
suffix: .jsp
SampleController.java
package springboot_demo;
import javax.annotation.Resource;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import springboot_demo.service.StudentService;
#Controller
#SpringBootApplication
public class SampleController extends SpringBootServletInitializer{
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SampleController.class);
}
#Resource
private StudentService studentService;
#RequestMapping("/")
public String home(Model model) {
model.addAttribute("data", studentService.list());
return "index";
}
public static void main(String[] args) throws Exception {
SpringApplication.run(SampleController.class, args);
}
}
The 'data' is correctly fetched from database, but the JSP page seems not compiled. I visit http://localhost:8080 and the browser shows me like this:
<%#page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%#taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>
<h2>Hello World!</h2>
<c:forEach items="${data }" var="i">
<h2>${i.id }${i.name }</h2>
</c:forEach>
</body>
</html>
Related
While I am doing simple spring boot application that showing a message in jsp page, I am getting the white label error page, what can be the reason?
in my application.java page:
package net.aswathy.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class SpringbootWebAppJspApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootWebAppJspApplication.class, args);
}
}
appplication properties:
spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp
in my controller:
package net.aswathy.springboot;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
#Controller
public class scontroller {
#GetMapping("/welcome")
public String welcome(Model model) {
model.addAttribute("message","Helloworld..!");
return "welcome";
}
}
in my jsp page:
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>${message}</h1>
</body>
</html>
I'm new with spring boot and I'm trying to make a project with Spring MVC + Spring Boot2 + JSP + Spring Data + DB Oracle.
When I run the simple application, The first message error I was been:
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Apr 17 10:20:05 CEST 2020
There was an unexpected error (type=Not Found, status=404).
No message available
I found a lot of documention about this error and I tested different solutions but nothing was fine for my problem. Below the tests I did:
1) I make sure that my main class was in the root package and I put the other packages int the sub level;
2) I used de #ComponentScan in the main class in this way #ComponentScan({"com.dashboard.demo.controller"});
3) in the application.properties I used this command server.servlet.context-path=/oee
This is my code:
Application.properties
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
server.servlet.context-path=/oee
## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.url= jdbc:oracle:thin:#serverIP:Port:DB11G
spring.datasource.username= Server name
spring.datasource.password= password
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.Oracle10gDialect
# Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto = create-drop
spring.jpa.show-sql= true
server.port = 8091
Main
package com.dashboard.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
public class OeeApplication extends SpringBootServletInitializer{
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(OeeApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(OeeApplication.class, args);
}
}
OEEController
package com.dashboard.demo.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.dashboard.demo.entities.OEE;
import com.dashboard.demo.service.OEEService;
#Controller
public class OEEController {
#Autowired
private OEEService oeeService;
#RequestMapping(value = "/oee}", method = RequestMethod.GET)
public String listAll(Model model)
{
List<OEE> oee = oeeService.SelDevice();
model.addAttribute("OEE",oee);
return "oee";
}
}
OEEServiceImpl
package com.dashboard.demo.service;
import java.util.List;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.dashboard.demo.entities.OEE;
import com.dashboard.demo.repository.OEERepository;
#Service
#Transactional
public class OEEServiceImpl implements OEEService{
#Autowired
private OEERepository oeeRepository;
#Override
public List<OEE> SelDevice()
{
return oeeRepository.findAll();
}
}
OEERepository
package com.dashboard.demo.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.dashboard.demo.entities.OEE;
import com.dashboard.demo.entities.OEEid;
#Repository
public interface OEERepository extends JpaRepository<OEE, OEEid>
{
}
I'm managing a composite key and I've create a class for the composite key and another to manage the entity. I'm catching the error int this package.
package com.dashboard.demo.entities;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Embeddable;
import org.springframework.format.annotation.DateTimeFormat;
import lombok.Data;
#Data
#Embeddable
public class OEEid implements Serializable{
/**
*
*/
private static final long serialVersionUID = 4512114330774744082L;
#DateTimeFormat(pattern = "dd-MM-yy HH:mm:ss")
#Column(name = "MSO_GIORNO_LAV")
private Date date;
#Column(name = "MSO_MACCHINA")
private String device;
public OEEid(Date date, String device) {
super();
this.date = date;
this.device = device;
}
}
package com.dashboard.demo.entities;
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.IdClass;
import javax.persistence.Table;
import lombok.Data;
#Entity
#Table(name = "MES_OEE")
#Data
public class OEE implements Serializable
{
/**
*
*/
private static final long serialVersionUID = -7738922358421962399L;
#EmbeddedId
private OEEid oeeID;
#Basic(optional = false)
#Column(name = "MSO_QUANTITA")
private int amount;
#Basic(optional = false)
#Column(name = "MSO_OEE")
private float oee;
}
oee.jsp
<!DOCTYPE html>
<%# taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css"
href="webjars/bootstrap/3.3.7/css/bootstrap.min.css" />
<c:url value="/css/main.css" var="jstlCss" />
<link href="${jstlCss}" rel="stylesheet" />
</head>
<body>
<div class="container">
<header>
<h1>Spring MVC + JSP + JPA + Spring Boot 2</h1>
</header>
<div class="starter-template">
<h1>Users List</h1>
<table
class="table table-striped table-hover table-condensed table-bordered">
<tr>
<th>Date</th>
<th>Device</th>
<th>Amount</th>
<th>OEE</th>
</tr>
<c:forEach items="${OEE}" var="oee">
<tr>
<td>${oee.oeeID.date}</td>
<td>${oee.oeeID.device}</td>
<td>${oee.amount}</td>
<td>${oee.oee}</td>
</tr>
</c:forEach>
</table>
</div>
</div>
<script type="text/javascript"
src="webjars/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</body>
</html>
Can anyone give me any suggestions to solve this error message?
Thanks
This is my project directory
Can you please try by removing this server.servlet.context-path=/oee from properties file and try with localhost:8080/oeee
I can't access getCpuUsage() method from my xhtml code via
<h:outputText id="cpu_usage"
value="#{cpuUsageBean.cpuUsage} %" />
When i add #bean annotation to my getCpuUsage() method this method works when component initialized.But after that when i try to access via xhtml file seen on the page nothing happened at all. I hope you understand me well . Thanks in advance
my 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:p="http://primefaces.org/ui">
<h:head></h:head>
<h:body style="margin-left:50px">
<h2>PrimeFaces Polling Example</h2>
<h:form>
CPU usage:
<b> <h:outputText id="cpu_usage"
value="#{cpuUsageBean.cpuUsage} %" />
</b>
<p:poll interval="1" update="cpu_usage" />
</h:form>
</h:body>
</html>
MY MANAGED BEAN SO COMPONENT:
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.annotation.PostConstruct;
import javax.faces.bean.ViewScoped;
import javax.inject.Inject;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Scope;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.InitBinder;
import lombok.extern.slf4j.Slf4j;
#Component
#Scope("VIEW")
//#ViewScoped
//#Named
#Slf4j
public class CpuUsageBean {
private AtomicInteger cpuUsage;
#PostConstruct
public void init() {
cpuUsage = new AtomicInteger(50);
ExecutorService es = Executors.newFixedThreadPool(1);
es.execute(() -> {
while (true) {
// simulating cpu usage
int i = ThreadLocalRandom.current().nextInt(-10, 11);
int usage = cpuUsage.get();
usage += i;
if (usage < 0) {
usage = 0;
} else if (usage > 100) {
usage = 100;
}
cpuUsage.set(usage);
try {
TimeUnit.MILLISECONDS.sleep(500);
} catch (InterruptedException e) {
}
}
});
}
public int getCpuUsage() {
System.out.println("-----getCpuUsage : " + cpuUsage);
log.error("---------- getCpuUsage calisti");
return cpuUsage.get();
}
}
MY SPRİNGBOOT APP CLASS :
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
#ComponentScan(basePackages = "com.tutorial.PrimeFacesTutorial.controller,com.tutorial.PrimeFacesTutorial")
public class PrimeFacesTutorialApplication {
public static void main(String[] args) {
SpringApplication.run(PrimeFacesTutorialApplication.class, args);
}
}
Good afternoon, sorry if the question has already been asked but ... I did not find the answer in those versions.
I’m studying spring by tuturial (https://www.youtube.com/watch?v=JfeCmn8NT88), trying to write a simple CRUD (I haven’t even reached to logic of the program)and i face the problem: Can't see a message form modelAndView Object in JSP representation page, IDEA tells that cannot resolve variable.
I understand that this may be redundant but here are all my files.
my project hierarchy
WebAppInitializer
package com.customermanager.config;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class WebAppInitializer implements WebApplicationInitializer {
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
applicationContext.register(WebMVCConfig.class);
ServletRegistration.Dynamic dispacher = servletContext.addServlet("SpringDispacher", new DispatcherServlet(applicationContext));
dispacher.setLoadOnStartup(1);
dispacher.addMapping("/");
}
}
WebMVCConfig
package com.customermanager.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
#Configuration
#EnableWebMvc
#ComponentScan("com.customermanager.*")
public class WebMVCConfig {
#Bean(name = "viewResolver")
public InternalResourceViewResolver getViewResolver(){
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
CustomerController
package com.customermanager.customer;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
#Controller
public class CustomerController {
#RequestMapping(value = "/")
public ModelAndView home() {
ModelAndView model = new ModelAndView("index");
model.addObject("message", "hello world");
return model;
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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-app_3_1.xsd"
version="3.1">
</web-app>
index.jsp
<%# page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Customer Manager</title>
</head>
<body>
<H1>${message}</H1>
<p>Message: ${message}</p>
Hello
</body>
</html>
In output i dont see my message: Hello from Spring MVC
thanks in advance for your help
I created a project with Spring + JPA + Hibernate. I want to pass a string from jsp to controller(removeUtente method). If I click on the link I delete the row from the database .. Where am I doing wrong? Excuse me for my english..The controller receives the string from jsp and calls the method to remove it.
Thanks
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%#taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h2>Lista utenti</h2>
<table border="1">
<c:forEach var="utente" items="${lista }">
<tr>
<td>
<c:out value="${utente.id}"/>
</td>
<td>
<c:out value="${utente.cognome}"/>
</td>
<td>
<c:out value="${utente.nome}"/>
</td>
<td>
<c:out value="${utente.eta}"/>
</td>
<td>
<c:url var="url" value="/remove">
<c:param name="id" value="${utente.id }"/>
</c:url>
click to delete
</td>
</tr>
</c:forEach>
</table>
</body>
</html>
UtenteController.java
package controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import persistence.UtenteDAO;
import bean.Utente;
#Controller
public class UtenteController {
#Autowired
UtenteDAO utenteDAO;
#RequestMapping(value="/add",method=RequestMethod.POST)
public String addUtente(#ModelAttribute Utente u){
utenteDAO.inserisciUtente(u);
return "index";
}//addUtente
#RequestMapping(value="/show",method=RequestMethod.GET)
public String getUtenti(ModelMap model){
List<Utente> lista=utenteDAO.listaUtenti();
model.addAttribute("lista", lista);
return "showlista";
}//getUtenti
#RequestMapping(value="/remove",method=RequestMethod.GET)
public String removeUtente(#RequestParam String id){
utenteDAO.rimuovi(id);
return "showlista";
}//removeUtente
}//UtenteController
Utente.java
package bean;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="utente")
public class Utente {
#Id
#GeneratedValue
#Column(name="id")
private Integer id;
#Column(name="cognome")
private String cognome;
#Column(name="nome")
private String nome;
#Column(name="eta")
private Integer eta;
public Integer getId(){return id;}//getId
public void setId(Integer id){this.id=id;}//setId
public String getCognome(){return cognome;}//getCognome
public void setCognome(String cognome){this.cognome=cognome;}//setCognome
public String getNome(){return nome;}//getNome
public void setNome(String nome){this.nome=nome;}//setNome
public Integer getEta(){return eta;}//getEta
public void setEta(Integer eta){this.eta=eta;}//setEta
#Override
public String toString(){
return "id:"+id+" cogn:"+cognome+" nome:"+nome+" eta:"+eta;
}//toString
}//Utente
UtenteDAOImpl.java
package persistence;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import org.springframework.transaction.annotation.Transactional;
import bean.Utente;
#Transactional
public class UtenteDAOImpl implements UtenteDAO {
#PersistenceContext
EntityManager em;
public void inserisciUtente(Utente u){
em.persist(u);
}//inserisciUtente
#SuppressWarnings("unchecked")
public List<Utente> listaUtenti(){
Query q=em.createQuery("SELECT u FROM Utente u");
List<Utente> ris=q.getResultList();
return ris;
}//listaUtenti
public void rimuovi(String idUtente){
Query q=em.createQuery("DELETE FROM Utente AS u WHERE u.id =:id");
q.setParameter("id", idUtente);
q.executeUpdate();
}//rimuovi
}//inserisciUtente