CRUD using spring and mybatis - spring

Question

HI hava a problem while creating a CRUD operation in browser
`HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: org.apache.jasper.JasperException: org.springframework.beans.NotReadablePropertyException: Invalid property 'standard' of bean class [com.raistudies.domain.User]: Bean property 'standard' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:548)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
here I have all part of the spring mvc + mybatis operations file
//controller
package com.raistudies.controllers;
import java.util.List;
import java.util.UUID;
import org.springframework.beans.factory.annotation.Autowired;
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;
import org.springframework.web.servlet.ModelAndView;
import com.raistudies.domain.User;
import com.raistudies.persistence.UserService;
import com.raistudies.validator.RegistrationValidator;
#Controller
#RequestMapping(value="/registration")
public class RegistrationController {
private RegistrationValidator validator = null;
private UserService userService = null;
#Autowired
public void setUserService(UserService userService) {
this.userService = userService;
}
public RegistrationValidator getValidator() {
return validator;
}
#Autowired
public void setValidator(RegistrationValidator validator) {
this.validator = validator;
}
#RequestMapping(method=RequestMethod.GET)
public String showForm(ModelMap model){
List<User> users = userService.getAllUser();
model.addAttribute("users", users);
User user = new User();
user.setId(UUID.randomUUID().toString());
model.addAttribute("user", user);
return "registration";
}
#RequestMapping(value="/add", method=RequestMethod.POST)
public ModelAndView add(#ModelAttribute(value="user") User user,BindingResult result){
validator.validate(user, result);
ModelAndView mv = new ModelAndView("registration");
if(!result.hasErrors()){
userService.saveUser(user);
user = new User();
user.setId(UUID.randomUUID().toString());
mv.addObject("user", user);
}
mv.addObject("users", userService.getAllUser());
return mv;
}
#RequestMapping(value="/update", method=RequestMethod.POST)
public ModelAndView update(#ModelAttribute(value="user") User user,BindingResult result){
validator.validate(user, result);
ModelAndView mv = new ModelAndView("registration");
if(!result.hasErrors()){
userService.updateUser(user);
user = new User();
user.setId(UUID.randomUUID().toString());
mv.addObject("user", user);
}
mv.addObject("users", userService.getAllUser());
return mv;
}
#RequestMapping(value="/delete", method=RequestMethod.POST)
public ModelAndView delete(#ModelAttribute(value="user") User user,BindingResult result){
validator.validate(user, result);
ModelAndView mv = new ModelAndView("registration");
if(!result.hasErrors()){
userService.deleteUser(user.getId());
user = new User();
user.setId(UUID.randomUUID().toString());
mv.addObject("user", user);
}
mv.addObject("users", userService.getAllUser());
return mv;
}
}
persistance is
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.raistudies.persistence.UserService">
<resultMap id="result" type="user">
<result property="id" column="id"/>
<result property="name" column="name"/>
<result property="studentClass" column="class"/>
<result property="roll" column="roll"/>
<!-- <result property="sex" column="sex"/>-->
</resultMap>
<select id="getAllUser" resultMap="result">
SELECT id,name,class,roll
FROM user;
</select>
<insert id="saveUser" parameterType="user">
INSERT INTO user (id,name,standard,age,sex)
VALUE (#{id},#{name},#{standard},#{age})
</insert>
<update id="updateUser" parameterType="user">
UPDATE user
SET
name = #{name},
standard = #{standard},
age = #{age},
sex = #{sex}
where id = #{id}
</update>
<delete id="deleteUser" parameterType="int">
DELETE FROM user
WHERE id = #{id}
</delete>
</mapper>
I have to do create delete update add operation but it is going to be error just like above while running my project......please help me

Answer 1

after changing the jsp code as per the variable that the java bean class(class containing geter or setter method) has.Then it will solve the problem.
*especially what I mean is you have to change the path in jsp <tr><td>Class : </td><td><form:input path="standard" /></td></tr>*as per the bean variable
previous jsp file (at error time)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%# page session="true" %>
<%# taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Hello World with Spring 3 MVC</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
<script type="text/javascript" src='<c:url value="/resources/common.js"/>'></script>
<script type="text/javascript" src='<c:url value="/resources/registration.js"/>'></script>
<script type="text/javascript">
var projectUrl = '<c:url value="/"/>';
if(projectUrl.indexOf(";", 0) != -1){
projectUrl = projectUrl.substring(0, projectUrl.indexOf(";", 0));
}
</script>
</head>
<body>
<fieldset>
<legend>Registration Form</legend>
<center>
<form:form commandName="user" action="/SpringMVCMyBatisCRUDExample/app/registration/add" name="userForm">
<form:hidden path="id"/>
<table>
<tr><td colspan="2" align="left"><form:errors path="*" cssStyle="color : red;"/></td></tr>
<tr><td>Name : </td><td><form:input path="name" /></td></tr>
<tr><td>Class : </td><td><form:input path="standard" /></td></tr>
<tr><td>RollNo: </td><td><form:input path="roll" /></td></tr>
<tr><td colspan="2"><input type="submit" value="Save Changes"/>
<input type="reset" name="newUser" value="New User" onclick="setAddForm();" disabled="disabled"/>
<input type="submit" name="deleteUser" value="Delete User" onclick="setDeleteForm();" disabled="disabled"/></td></tr>
</table>
</form:form>
</center>
</fieldset>
<c:if test="${!empty users}">
<br />
<center>
<table width="90%">
<tr style="background-color: gray;">
<th>Name</th>
<th>Class</th>
<th>RollNo</th>
</tr>
<c:forEach items="${users}" var="user">
<tr style="background-color: silver;" id="${user.id}" onclick="setUpdateForm('${user.id}');">
<td><c:out value="${user.name}"/></td>
<td><c:out value="${user.studentClass}"/></td>
<td><c:out value="${user.roll}"/></td>
</tr>
</c:forEach>
</table>
</center>
<br />
</c:if>
</body>
my java bean class
package com.raistudies.domain;
import java.io.Serializable;
public class User implements Serializable{
private static final long serialVersionUID = 3647233284813657927L;
private String id;
private String name = null;
private String studentClass = null;
private String roll;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStudentClass() {
return studentClass;
}
public void setStudentClass(String studentClass) {
this.studentClass = studentClass;
}
public String getRoll() {
return roll;
}
public void setRoll(String roll) {
this.roll = roll;
}
#Override
public String toString() {
return "User [name=" + name + ", class="+ studentClass+ ", roll=" + roll + "]";
}
}
previously I had standard variable in java bean class(model class) but I have to change it to studentClass so not to be error we must change the jsp path that is
<tr><td>Class : </td><td><form:input path="standard" /></td></tr>.......
to
<tr><td>Class : </td><td><form:input path="studentClass" /></td></tr>