I am new to Spring and trying one user registration example using maven with spring mvc.
I am able to lunch my home page but when i click on the login link than getting 404 error page not found.
Below are my application details:-
Web.xml
<web-app id = "WebApp_ID" version = "2.4"
xmlns = "http://java.sun.com/xml/ns/j2ee"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation = "http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Archetype Created Web Application</display-name>
<welcome-file-list>
<welcome-file>home.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
DispacterServlet:-
<?xml version="1.0" encoding="UTF-8"?>
<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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<import resource="classpath.*:jbr/config/user-beans.xml" />
<context:component-scan base-package="jbr.springmvc" />
<context:annotation-config />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
Controller:-
package jbr.springmvc.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
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.servlet.ModelAndView;
import jbr.springmvc.model.Login;
import jbr.springmvc.model.User;
import jbr.springmvc.service.UserService;
#Controller
public class LoginController {
#Autowired
UserService userService;
#RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView showLogin(HttpServletRequest request, HttpServletResponse response) {
ModelAndView mav = new ModelAndView("login");
mav.addObject("login", new Login());
return mav;
}
#RequestMapping(value = "/loginProcess", method = RequestMethod.POST)
public ModelAndView loginProcess(HttpServletRequest request, HttpServletResponse response,
#ModelAttribute("login") Login login) {
ModelAndView mav = null;
User user = userService.validateUser(login);
if (null != user) {
mav = new ModelAndView("welcome");
mav.addObject("firstname", user.getFirstname());
} else {
mav = new ModelAndView("login");`enter code here`
mav.addObject("message", "Username or Password is wrong!!");
}
return mav;
}
}
Login.jsp
<%# taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%# page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
<!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>Login</title>
</head>
<body>
<form:form id="loginForm" modelAttribute="login" action="loginProcess" method="post">
<table align="center">
<tr>
<td>
<form:label path="username">Username: </form:label>
</td>
<td>
<form:input path="username" name="username" id="username" />
</td>
</tr>
<tr>
<td>
<form:label path="password">Password:</form:label>
</td>
<td>
<form:password path="password" name="password" id="password" />
</td>
</tr>
<tr>
<td></td>
<td align="left">
<form:button id="login" name="login">Login</form:button>
</td>
</tr>
<tr></tr>
<tr>
<td></td>
<td>Home
</td>
</tr>
</table>
</form:form>
<table align="center">
<tr>
<td style="font-style: italic; color: red;">${message}</td>
</tr>
</table>
</body>
</html>
I have tried so many some but not able to find any solution for this.
Please help me to identify where I am doing wrong.It's my first application in spring so not able to perform any more analysis.
Please guide me with this
You Have specified home.jsp in your welcome file list. I don't see a home.jsp file in your file path. May be that's throwing you 404. You have a login.jsp. Make your controller return "login" from your controller. Either wise works. Since you mentioned as a beginner, you can check here for bootstrapping a basic app.
https://github.com/mrakhunathan/SpringWebSkeleton.git
Related
I am trying to make simple project in Spring MVC,but getting this error :
WARNING: No mapping found for HTTP request with URI [/SpringMVCForm/login.htm] in DispatcherServlet with name 'springform'
HTTP Status 404 - Not Found.
Not able to get what I am missing. Please let me know.
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
<display-name>SpringMVCForm</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springform</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springform</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
</web-app>
springform-servlet.xml :
<?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"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.mvcform.*" />
<mvc:annotation-driven />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
LoginController.java
package com.mvcform.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
#Controller
#RequestMapping("/login.htm")
public class LoginController {
#RequestMapping(method=RequestMethod.POST)
public ModelAndView processCredentials(#RequestParam("userId") String userId, #RequestParam("password") String password) {
String message = "Invalid Credentials";
if (userId != null && userId.length() >= 5) {
if (userId.equals(password)) {
//message = "Welcome " + userId + " !!!";
return new ModelAndView("redirect:/showform");
}
}
return new ModelAndView("index", "message", message);
}
}
index.jsp:
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Spring MVC Form</title>
</head>
<body>
<h1> Index.jsp </h1>
<h1>Enter your user id and password</h1>
<form action="login.htm" method="post">
<table>
<tr>
<td> User Id </td>
<td> <input type="text" name="userId" /></td>
</tr>
<tr>
<td>Password </td>
<td> <input type="password" name="password" /></td>
</tr>
<tr>
<td>
<input type="submit" value="Submit" />
</td>
</tr>
</table>
</form>
</body>
</html>
I think Spring is not able to scan base package: com.mvcform.*
Please let me know what I am missing here.
1) if you configured correct then you must check the json format which you sending to server to save it may be wrong (refere the urlenter link description here)
2) please check your controller controller doesn't have this url "URI [/SpringMVCForm/login.htm]" you have only /login.htm url.
Remove
#RequestMapping("/login.htm")
and keep only
#RequestMapping("/login")
in controller
When try to run spring sample application using maven i have got the exception mentioned.
Here is my program
Firstpage1.jsp [present in Webcontent]
<html>
<head>
<title>Finacle data retriever</title>
</head>
<body>
<h2>Enter the configuration details</h2>
<form:form method="POST" action="/formexample/Configgen" commandName="configbean">
<table>
<tr>
<td><form:label path="tnu">Total number of Users</form:label></td>
<td><form:input path="tnu" /></td>
</tr>
<tr>
<td><form:label path="cnu">Concurrent number of Users</form:label></td>
<td><form:input path="cnu" /></td>
</tr>
<tr>
<td><form:label path="kat">Keep Alive Timeout</form:label></td>
<td><form:input path="kat" /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="Submit" /></td>
</tr>
</table>
</form:form>
</body>
</html>
result.jsp [ Webcontent/WEB-INF/jsp]
<%#taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Result page</title>
</head>
<body>
<h2> Result page information</h2>
<table>
<tr>
<td>Total Number of users</td>
<td>${congibean.tnc}</td>
</tr>
<tr>
<td>Concurrent Number of users</td>
<td>${congibean.cnu}</td>
</tr>
<tr>
<td>Keep alive timeout</td>
<td>${congibean.kat}</td>
</tr>
</table>
</body>
</html>
**spring dependencies are present in maven dependencies.**
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" 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_2_5.xsd"
id="WebApp_ID" version="2.5">
<jsp-config>
<taglib>
<taglib-uri>/WEB-INF/spring-form.tld</taglib-uri>
<taglib-location>spring-form.tld</taglib-location>
</taglib>
</jsp-config>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/formex-servlet.xml</param-value>
</context-param>
<welcome-file-list>
<welcome-file>Firstpage1.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>formex</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>formex</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
formex-servlet.xml
<?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-4.2.xsd">
<context:component-scan base-package="formexamplepack1"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
formexamplepack1 - package
configbean.java
package formexamplepack1;
public class configbean {
private int tuc;
private int cnu;
private int kat;
public int getTuc() {
return tuc;
}
public void setTuc(int tuc) {
this.tuc = tuc;
}
public int getCnu() {
return cnu;
}
public void setCnu(int cnu) {
this.cnu = cnu;
}
public int getKat() {
return kat;
}
public void setKat(int kat) {
this.kat = kat;
}
}
ConfigurationController.java
package formexamplepack1;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
#Controller
#RequestMapping(value = "/Configgen")
public class ConfigurationController {
#RequestMapping(method=RequestMethod.GET)
public String showform(ModelMap model) {
configbean configbean=new configbean();
model.addAttribute("configbean",configbean);
return "Firstpage";
}
#RequestMapping(method=RequestMethod.POST)
public String getdetails(#ModelAttribute("configbean")configbean configbean,ModelMap model,BindingResult bindingResult){
model.addAttribute("tnu", configbean.getTuc());
model.addAttribute("cnu", configbean.getCnu());
model.addAttribute("kat",configbean.getKat());
return "result";
}
}
Help me in resolving the below exception. I have gone through all the answers but not able to figure out. Using java 1.8 and spring jars latest [4.2.6]
tomcat- 7.0.68
Below is the exception
org.apache.jasper.JasperException: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'configbean' available as request attribute
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:472)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'configbean' available as request attribute
org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168)
org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188)
org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:130)
org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:120)
org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:90)
org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84)
org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80)
org.apache.jsp.Firstpage1_jsp._jspx_meth_form_005flabel_005f0(Firstpage1_jsp.java:216)
org.apache.jsp.Firstpage1_jsp._jspx_meth_form_005fform_005f0(Firstpage1_jsp.java:152)
org.apache.jsp.Firstpage1_jsp._jspService(Firstpage1_jsp.java:105)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Try:
without ModelAttribute annotation
Binding Result direct after the command object
like:
#RequestMapping(method=RequestMethod.POST)
public String getdetails(configbean configbean, BindingResult bindingResult){
model.addAttribute("tnu", configbean.getTuc());
model.addAttribute("cnu", configbean.getCnu());
model.addAttribute("kat",configbean.getKat());
return "result";
}
you are trying to use ${congibean.tnc} in your result.jsp file , but you are not passing it as a model attribute . Instead you are trying to pass "tnu","cnu" and "kat" .
As a result it's giving you a jasper exception , as the compiler is unable to find any model attribute called "configbean" .
To solve this either pass only "configBean" as your model Attribute in the getdetails() method , or change your result.jsp file to use only "${tnc}", "${cnu}" and "${kat}"
I'm using validation-api-1.1.0.Final.jar to valid form input in Spring 4 MVC. But I'm stuck in here, the result.hasErrors() seems always false(it means #Valid doesn't work properly). I followed this guideValidating Form Input, but that guide validating form input using Spring Boot. I'm using Tomcat 8 instead of using Spring Boot. I've search a lot about this, but the issue still existed.
Seaking for help.
Thanks!
Project Structure:
UserController.java
package com.ro.user.controller;
import com.ro.user.model.UserModel;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import javax.validation.Valid;
#Controller
public class UserController {
#RequestMapping(value = "/user", method = RequestMethod.GET)
public UserModel user(Model model) {
UserModel userModel = new UserModel();
model.addAttribute("userModel", userModel);
return userModel;
}
#RequestMapping(value = "/userLogin", method = RequestMethod.POST)
public String userLogin(#Valid #ModelAttribute("userModel") UserModel userModel, BindingResult bindingResult) {
System.out.println("Before: bindingResult.hasErrors()");
if (bindingResult.hasErrors()) {
System.out.println("After: bindingResult.hasErrors()");
return "user";
}
return "result";
}
}
UserModel.java
package com.ro.user.model;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class UserModel {
#NotNull
#Size(min = 6, max = 12)
private String username;
#Size(min = 8, max = 16)
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
user.jsp
<%# page contentType="text/html;charset=UTF-8" language="java" %>
<%# taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<html>
<head>
<title>Spring MVC Form Handling</title>
<style>
.error {
color: #ff0000;
}
.errorblock {
color: #000;
background-color: #ffEEEE;
border: 3px solid #ff0000;
padding: 8px;
margin: 16px;
}
</style>
</head>
<body>
<h2>User Information</h2>
<form:form action="userLogin" modelAttribute="userModel" method="POST">
<form:errors path="*" cssClass="errorblock" element="div"/>
<table>
<tr>
<td><form:label path="username">Username:</form:label></td>
<td><form:input path="username"/></td>
<td><form:errors path="username" cssClass="error"/></td>
</tr>
<tr>
<td><form:label path="password">Password:</form:label></td>
<td><form:input path="password"/></td>
<td><form:errors path="username" cssClass="error"/></td>
</tr>
<tr>
<td colspan="3">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>
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">
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>UserLogin</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>UserLogin</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
UserLogin-servlet.xml
<?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"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<mvc:annotation-driven/>
<context:component-scan base-package="com.ro.user.controller"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean class="org.springframework.context.support.ResourceBundleMessageSource" id="messageSource">
<property name="basename" value="com.ro.user.model.error"/>
</bean>
</beans>
This issue is caused by lack of the dependency of Hibernate Validator. It is supposed to add all Jars in a folder named required to project's lib(download zip from the official website and unzip it, you will see this folder). Not just the hibernate-validator.jar and validation-api.jar.
I guess you've created a custom HandlerAdapter, then you need to initialize the webBinding manually.
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="webBindingInitializer">
<bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
<property name="validator" ref="validator"/>
</bean>
</property>
</bean>
I had the same issue. I resolved it by changing hibernate validator version. In my case, it worked with version 6.2 and it didn't work with version 7.
I created a Spring MVC Project but the errors of form are not displayed .Why?
I try to create a simple form.This is the code of my Project.The project works but in jsp the error are not dispayed..Where did I go wrong?Thanks
Student.java
package coreservlets;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class Student {
#Size(min=4,max=5,message="Size wrong")
#NotNull
private String name;
#Size(min=4,max=5,message="Size wrong")
#NotNull
private Integer age;
#Size(min=4,max=5,message="Size wrong")
#NotNull
private Integer id;
public String getName(){return name;}//getName
public void setName(String name){this.name=name;}//setName
public Integer getAge(){return age;}//getAge
public void setAge(Integer age){this.age=age;}//setAge
public Integer getId(){return id;}//getId
public void setId(Integer id){this.id=id;}//setId
}//Student
StudentController.java
package coreservlets;
import javax.validation.Valid;
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.servlet.ModelAndView;
#Controller
public class StudentController {
#RequestMapping(value="/",method=RequestMethod.GET)
public ModelAndView student(){
return new ModelAndView("student", "command", new Student());
}//student
#RequestMapping(value="/addStudent", method=RequestMethod.POST)
public String addStudent(#ModelAttribute #Valid Student student,ModelMap model){
model.addAttribute("name",student.getName());
model.addAttribute("age",student.getAge());
model.addAttribute("id",student.getId());
return "result";
}//addStudent
}//StudentController
student.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%#taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!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>Spring MVC Form Handling</title>
</head>
<body>
<h2>Student Information</h2>
<form:form method="post" action="/SpringMVCFormExample/addStudent" >
<table>
<tr>
<td><form:label path="name">Name</form:label></td>
<td><form:input path="name"/></td>
<form:errors path="name" />
</tr>
<tr>
<td><form:label path="age">Age</form:label></td>
<td><form:input path="age"/></td>
<form:errors path="age" />
</tr>
<tr>
<td><form:label path="id">Id</form:label></td>
<td><form:input path="id"/></td>
<form:errors path="id" />
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form:form>
result.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%#taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Submitted Student Information</h2>
<table>
<tr>
<td>Name</td>
<td>${name}</td>
</tr>
<tr>
<td>Age</td>
<td>${age}</td>
</tr>
<tr>
<td>Id</td>
<td>${id}</td>
</tr>
</table>
</body>
</html>
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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Spring MVC Form</display-name>
<servlet>
<servlet-name>SpringMVCForm</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVCForm</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
SpringMVCForm-servlet.xml
<?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"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
<context:component-scan base-package="coreservlets" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
Use BindingResult class as parameter in your method.
your method should look like this
public String addStudent(#ModelAttribute #Valid Student student,ModelMap model,BindingResult result)
Spring MVC will validate the model object annotated by the #Valid annotation after binding its properties with inputs from JSP form that uses Spring’s form tags. Any constraint violations will be exposed as errors in the BindingResult object, thus we can check the violation in the controller’s method like this:
if (result.hasErrors()) {
// form validation error
} else {
// form input is ok
}
The following code will return the user to the student form when a validation error occurs. When there is no validation error, the result template will be shown
#RequestMapping(value="/addStudent", method=RequestMethod.POST)
public String addStudent(#Valid Student student, BindingResult errors, Model model){
if (errors.hasErrors()) {
return "student";
}
model.addAttribute("name",student.getName());
model.addAttribute("age",student.getAge());
model.addAttribute("id",student.getId());
return "result";
}
You need to make sure that BindingResult errors is positioned exactly after #ModelAttribute #Valid Student student
Check out this and this tutorial for more info.
On another note, you should probably be redirecting the user after a successful POST. See this for more details
If you set the validation at model level you should use BindingResult:
#RequestMapping(value="/addStudent", method=RequestMethod.POST)
public String addStudent(#ModelAttribute #Valid Student student,ModelMap model,BindingResult errors){
if (errors.hasErrors()) {
List<FieldError> lerr = errors.getFieldErrors();
for (FieldError err: lerr) {
// manage the errorrs
}
}
model.addAttribute("name",student.getName());
model.addAttribute("age",student.getAge());
model.addAttribute("id",student.getId());
return "result";
}
if you want to handle validation at client level you can jquery.validate.js.
I am trying some samples in spring mvc.I have three classes Student.java and StudentController.java as follows
Student.java
package mvc1;
public class Student {
private Integer age;
private String name;
private Integer id;
public void setAge(Integer age) {
this.age = age;
}
public Integer getAge() {
return age;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
}
StudentController.java
package mvc1;
import org.springframework.stereotype.Controller;
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.servlet.ModelAndView;
import org.springframework.ui.ModelMap;
#Controller
#RequestMapping("login.do")
public class StudentController {
#RequestMapping(value = "/student", method = RequestMethod.GET)
public ModelAndView student() {
return new ModelAndView("student", "command", new Student());
}
#RequestMapping(value = "/addStudent", method = RequestMethod.POST)
public String addStudent(#ModelAttribute("SpringWeb")Student student,
ModelMap model) {
model.addAttribute("name", student.getName());
model.addAttribute("age", student.getAge());
model.addAttribute("id", student.getId());
return "result";
}
}
I have a servlet xml file as HelloWeb-Servlet.xml which is as follow
<?xml version="1.0" encoding="UTF-8"?>
<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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="Servee" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
and the web.xml file as follows...
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/DispatcherServlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-
class>
</listener>
<servlet>
<servlet-name>HelloWeb</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>HelloWeb</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
and the student.jsp and result.jsp files are stored in mvc11 package
student.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h2>Student Information</h2>
<form:form method="POST" action="/Spring/mvc1/addStudent">
<table>
<tr>
<td><form:label path="name">Name</form:label></td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td><form:label path="age">Age</form:label></td>
<td><form:input path="age" /></td>
</tr>
<tr>
<td><form:label path="id">id</form:label></td>
<td><form:input path="id" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>
result.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h2>Submitted Student Information</h2>
<table>
<tr>
<td>Name</td>
<td>${name}</td>
</tr>
<tr>
<td>Age</td>
<td>${age}</td>
</tr>
<tr>
<td>ID</td>
<td>${id}</td>
</tr>
</table>
</body>
</html>
When running the spring program i am getting the warning message as follows
log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
and the error message as
The requested resource (/Spring/mvc11/student.jsp) is not available.
the HelloWeb-Servlet.xml is stored under WEB-INF.I have referred a lot of source but couldnt fix it.Can someone help me with it...
Looks like there are multiple problems
The package mvc1 is not added to component-scan.
solution: Add the following line to HelloWeb-Servlet.xml
#RequestMapping("login.do") annotation in StudentController does not make any sense, remove it
You have a mapping for the url /student, but is trying to access /Spring/mvc11/student.jsp, either change the RequestMapping or the requested url