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POErrors in my springs MVC
 

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  1. POErrors in my springs MVC
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    <p>I have written a simple web app in springs but I am facing an error in running the project.The error I am facing is</p> <pre><code>org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/view/UserDetails.jsp at line 22 19: &lt;c:out value="${chat.username}:"/&gt; 20: &lt;c:out value="${chat.message}"/&gt; 21: &lt;/c:forEach&gt; 22: &lt;form:input path="message"/&gt; 23: &lt;input type="submit" value="Send" /&gt; 24: &lt;/form:form&gt; 25: &lt;br&gt; </code></pre> <p>and </p> <pre><code> org.springframework.beans.NotReadablePropertyException: Invalid property 'message' of bean class [java.util.ArrayList]: Bean property 'message' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter? </code></pre> <p>My POJO class is</p> <pre><code>package com.beingjavaguys.domain; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; import org.hibernate.annotations.Generated; @Entity @Table(name="messages") public class Chat { @Id @GeneratedValue @Column(name = "user_id") private int id; @Column(name="username") private String username; @Column(name="message") private String message; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } </code></pre> <p>and my <code>Dispatcher servlet</code> is</p> <pre><code> &lt;bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"&gt; &lt;property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /&gt; &lt;property name="prefix" value="/WEB-INF/view/" /&gt; &lt;property name="suffix" value=".jsp" /&gt; &lt;/bean&gt; &lt;bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt; &lt;property name="driverClassName" value="${database.driver}" /&gt; &lt;property name="url" value="${database.url}" /&gt; &lt;property name="username" value="${database.user}" /&gt; &lt;property name="password" value="${database.password}" /&gt; &lt;/bean&gt; &lt;bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"&gt; &lt;property name="dataSource" ref="dataSource" /&gt; &lt;property name="annotatedClasses"&gt; &lt;list&gt; &lt;value&gt;com.beingjavaguys.domain.User&lt;/value&gt; &lt;value&gt;com.beingjavaguys.domain.Chat&lt;/value&gt; &lt;/list&gt; &lt;/property&gt; &lt;property name="hibernateProperties"&gt; &lt;props&gt; &lt;prop key="hibernate.dialect"&gt;${hibernate.dialect}&lt;/prop&gt; &lt;prop key="hibernate.show_sql"&gt;${hibernate.show_sql}&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="hibernateTransactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"&gt; &lt;property name="sessionFactory" ref="sessionFactory" /&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre> <p>My JSP page is*<em>Now I have edited the page</em>*</p> <pre><code>&lt;%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%&gt; &lt;%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%&gt; &lt;%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=UTF-8"&gt; &lt;title&gt;Group chat | User Details&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;center&gt; &lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt; &lt;div style="color: teal;font-size: 30px"&gt;Group Chat&lt;/div&gt; &lt;br&gt;&lt;br&gt; &lt;c:url var="userRegistration" value="saveChat.html"/&gt; &lt;form:form id="chatMessages" modelAttribute="chat" method="post" action="${userRegistration}"&gt; &lt;c:forEach items="${chat}" var="chat"&gt; &lt;c:out value="${chat.username}:"/&gt; &lt;c:out value="${chat.message}"/&gt; &lt;/c:forEach&gt; &lt;form:input path="message"/&gt; &lt;input type="submit" value="Send" /&gt; &lt;/form:form&gt; &lt;br&gt; &lt;/center&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>My Controller is</p> <pre><code>@RequestMapping("/saveChat") public ModelAndView saveChat(@ModelAttribute("chat") Chat chat,BindingResult result){ userService.addChat(chat); return new ModelAndView("redirect:/userList"); } @RequestMapping("/userList") public ModelAndView getUserList() { Map&lt;String, Object&gt; model = new HashMap&lt;String, Object&gt;(); model.put("chat", userService.getChat()); return new ModelAndView("UserDetails", model); } </code></pre> <p>I am unable to grasp the problem here(<strong>Edited the error</strong>).</p>
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    1. USNilesh
    1. USNilesh
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    1. COPlease add the JSP page trying to access `Chat.message`. It looks as if you are expecting an object of type `Chat`, but it is actually an `ArrayList` (which doesn't have a `getMessage(String)` method).
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      1. USMagnilex
    2. COHi I did the changes but stuck with different error.
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      1. USNilesh
    3. COmodel.put("chat", userService.getChat()); seems to adding ArrayList Object , and you are trying to get it as Chat Object
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      1. UScsk
 

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