@Transactional
public void delete(Long id) {
* User user = (User) session.get(User.class, id);
* session.delete(user);
}
Kemungkinan besar memang sudah di-delete waktu pertama kali.
Waktu kedua method session.get() menghasilkan null.
Coba ganti seperti ini:
@Transactional
public void delete(Long id) {
* User user = (User) session.get(User.class, id);*
* if(user == null) {*
* System.out.println("data memang udah ga ada");*
* } else {*
* System.out.println("data dihapus id=" + id);*
* session.delete(user);*
* }
* }
On 5 March 2010 13:07, Mirza Akhena <mirken...@gmail.com> wrote:
>
>
> Halo temen2 Juger sekalian..
>
> Saat ini aku lagi belajar pake Hibernate dalam Spring dan aku udah buat
> project Helloworld untuk mempelajarinya.
>
> aku pake MultiActionController pada Controllernya (UserController.java)
> pake Annotation pada class Modelnya (User.java)
>
> Tapi pas aku mau klik link delete (pada userPage.jsp), kok gak berhasil
> yah?
>
> klik (link "Hapus") utk pertama kali gak ada respon apa2 (harusnya udah
> hilang datanya),
> tapi pas klik dua kali malah muncul error :
>
> *java.lang.IllegalArgumentException: attempt to create delete event with null
> entity*
>
> pas di cek di MySQL, datanya masih utuh, belum kehapus,
>
>
>
> Mohon bantuannya ya temen2, kira2 salahnya dimana ya?
>
>
>
>
>
>
> ini aku lampirin kode helloworldnya :
>
> ====================================================
> *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">
>
> <display-name>simplespringhibernate</display-name>
> <welcome-file-list>
> <welcome-file>index.jsp</welcome-file>
> </welcome-file-list>
>
> <servlet>
> <servlet-name>simplespringhibernate</servlet-name>
>
> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
> <load-on-startup>1</load-on-startup>
> </servlet>
>
> <servlet-mapping>
> <servlet-name>simplespringhibernate</servlet-name>
> <url-pattern>*.htm</url-pattern>
> </servlet-mapping>
>
> </web-app>
>
>
> ====================================================
> *simplespringhibernate-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:tx="http://www.springframework.org/schema/tx";
> xsi:schemaLocation="http://www.springframework.org/schema/beans
> http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
> http://www.springframework.org/schema/tx
> http://www.springframework.org/schema/tx/spring-tx-2.5.xsd";>
>
> <bean id="dataSource"
> class="org.apache.tomcat.dbcp.dbcp.BasicDataSource">
> <property name="driverClassName" value="com.mysql.jdbc.Driver" />
> <property name="url" value="jdbc:mysql://localhost/simple" />
> <property name="username" value="root" />
> <property name="password" value="" />
> </bean>
>
> <bean id="sessionFactory"
>
> class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
> destroy-method="destroy">
> <property name="dataSource" ref="dataSource" />
> <property name="annotatedClasses">
> <list>
> <value>com.simple.model.User</value>
> </list>
> </property>
> <property name="hibernateProperties">
> <props>
> <prop
> key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
> <prop key="hibernate.show_sql">true</prop>
> <prop key="hibernate.hbm2ddl.auto">update</prop>
> </props>
> </property>
> </bean>
>
> <tx:annotation-driven />
>
> <bean id="transactionManager"
>
> class="org.springframework.orm.hibernate3.HibernateTransactionManager">
> <property name="sessionFactory" ref="sessionFactory" />
> </bean>
>
> <bean id="internalResourceViewResolver"
>
> class="org.springframework.web.servlet.view.InternalResourceViewResolver">
> <property name="prefix" value="/WEB-INF/view/" />
> <property name="suffix" value=".jsp" />
> </bean>
>
> <bean name="/userPage/*.htm"
> class="com.simple.controller.UserController">
> <constructor-arg ref="sessionFactory" />
> </bean>
>
> </beans>
>
>
> ====================================================
> *User.java*
>
> package com.simple.model;
>
> import javax.persistence.Column;
> import javax.persistence.Entity;
> import javax.persistence.GeneratedValue;
> import javax.persistence.GenerationType;
> import javax.persistence.Id;
> import javax.persistence.Table;
>
> @Entity
> @Table(name = "USER")
> public class User {
>
> @Id
> @GeneratedValue(strategy = GenerationType.AUTO)
> @Column(name = "ID")
> private Long id;
>
> @Column(name = "NAME", length = 30, nullable = false)
> private String name;
>
> @Column(name = "AGE", nullable = false)
> private int age;
>
> public Long getId() { return id; }
>
> public void setId(Long id) { this.id = id; }
>
> public String getName() { return name; }
>
> public void setName(String name) { this.name = name; }
>
> public int getAge() { return age; }
>
> public void setAge(int age) { this.age = age; }
>
> }
>
> ====================================================
> *UserController.java*
>
> package com.simple.controller;
>
> import java.util.List;
>
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
>
> import org.hibernate.Session;
> import org.hibernate.SessionFactory;
> import org.springframework.web.bind.ServletRequestUtils;
> import org.springframework.web.servlet.ModelAndView;
> import
> org.springframework.web.servlet.mvc.multiaction.MultiActionController;
>
> import com.simple.model.User;
> import com.simple.service.UserService;
>
> public class UserController extends MultiActionController {
>
> private UserService userService;
>
> public UserController(SessionFactory sessionFactory) {
> Session session = sessionFactory.openSession();
> userService = new UserService(session);
> }
>
> public ModelAndView add(HttpServletRequest request, HttpServletResponse
> httpServletResponse, User user) throws Exception {
> userService.store(user);
> return new ModelAndView("redirect:list.htm");
> }
>
> public ModelAndView remove(HttpServletRequest request,
> HttpServletResponse response) throws Exception {
> Long id = ServletRequestUtils.getLongParameter(request, "id");
> userService.delete(id);
> return new ModelAndView("redirect:list.htm");
> }
>
> public ModelAndView list(HttpServletRequest request,
> HttpServletResponse httpServletResponse) throws Exception {
> List<User> users = userService.getAll();
> return new ModelAndView("userPage", "users", users);
> }
>
> }
>
>
> ====================================================
> *UserService.java*
>
> package com.simple.service;
>
> import java.util.List;
>
> import org.hibernate.Session;
> import org.springframework.transaction.annotation.Transactional;
>
> import com.simple.model.User;
>
> public class UserService {
>
> private Session session;
>
> public UserService(Session session) {
> this.session = session;
> }
>
> @Transactional
> public void store(User user) {
> session.saveOrUpdate(user);
> }
>
> @Transactional
> public void delete(Long id) {
> User user = (User) session.get(User.class, id);
> session.delete(user);
> }
>
> @SuppressWarnings("unchecked")
> @Transactional(readOnly = true)
> public List<User> getAll() {
> return session.createQuery("from User").list();
> }
> }
>
> ====================================================
> *userPage.jsp*
>
> <%...@taglib uri="http://java.sun.com/jsp/jstl/core"; prefix="c"%>
>
> <html>
> <head>
> <title>List User</title>
> </head>
> <body>
>
> <form action="add.htm">
> <table border="1">
> <tr>
> <td>Nama</td>
> <td><input type="text" name="name" /></td>
> </tr>
> <tr>
> <td>Umur</td>
> <td><input type="text" name="age" /></td>
> </tr>
> </table>
> <input type="submit" value="Daftar" />
> </form>
>
> <table border="1">
> <tr>
> <th>Nama</th>
> <th>Umur</th>
> <th>Hapus</th>
> </tr>
> <c:forEach items="${users}" var="u">
> <tr>
> <td>${u.name}</td>
> <td>${u.age}</td>
> <td><a href="/simplespringhibernate/userPage/remove.htm?id=${
> u.id}">Hapus</a></td>
> </tr>
> </c:forEach>
> </table>
>
> </body>
> </html>
>
> ====================================================
> *index.jsp*
>
> <%...@taglib uri="http://java.sun.com/jsp/jstl/core"; prefix="c"%>
>
> <c:redirect url="userPage/list.htm" />
>
>
>
>
>
> ====================================================
>
> --
> Best Regards
>
> Mirza Akhena
>
>
>
--
-o--o---( ^ ^ )---o--o-
Speed Optimization: Seek and ye shall find!
In case it isn't in the cache yet, too bad, you've to wait 40x longer.
Daniel Baktiar (http://dbaktiar.wordpress.com)
