Struts2和Hibernate3.0一个CRUD实例

?Struts2CRUD实例一、在这个实例中

可以看到如何进行CREATE、READ、UPDATE、DELETE操作（CRUD）。

页面效果如下图：

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包目录结构如下：

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二、代码说明

1、Model类User.java

package com.test.model;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

import org.hibernate.validator.NotEmpty;

@javax.persistence.Entity
@Table(name="user3")//用注释，hibernate通过反向生成表

public class User {
?private int id;
?private String name;
?private String gender;
?private String country;
?private String aboutYou;
?private Boolean mailingList;
?
?@Id
?@GeneratedValue
?@Column(name="id")
?public int getId() {
??return id;
?}
?public void setId(int id) {
??this.id = id;
?}
?@NotEmpty
?@Column(name="name",length=50,nullable=false)
?public String getName() {
??return name;
?}
?public void setName(String name) {
??this.name = name;
?}
?@NotEmpty
?@Column(name="gender")
?public String getGender() {
??return gender;
?}
?public void setGender(String gender) {
??this.gender = gender;
?}
?@NotEmpty
?@Column(name="country")
?public String getCountry() {
??return country;
?}
?public void setCountry(String country) {
??this.country = country;
?}
?
?@Column(name="aboutYou",length=100,nullable=false)
?public String getAboutYou() {
??return aboutYou;
?}
?public void setAboutYou(String aboutYou) {
??this.aboutYou = aboutYou;
?}
?@Column(name="mailList")
?public Boolean getMailingList() {
??return mailingList;
?}
?public void setMailingList(Boolean mailingList) {
??this.mailingList = mailingList;
?}
?
?
}
2、hibernate.cfg.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
??"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
??"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
?<session-factory>
??<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
??<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
??<property name="hibernate.connection.username">root</property>
??<property name="connection.password">123456</property>
??<property name="connection.pool_size">1</property>
??<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
??<property name="show_sql">true</property>
??<property name="hbm2ddl.auto">none</property>
??<property name="hibernate.current_session_context_class">jta</property >
??<property name="hibernate.current_session_context_class">thread</property>
??
??<mapping />//使用的是java类，而不是hbm.xml，前面Model类使用了注释
?</session-factory>
</hibernate-configuration>

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3、到DaoImpl代码如下

package com.test.dao;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;

import com.googlecode.s2hibernate.struts2.plugin.annotations.SessionTarget;
import com.googlecode.s2hibernate.struts2.plugin.annotations.TransactionTarget;
import com.test.model.User;

public class UserDaoImpl implements UserDao {

/*这里通过注释，取得Session，和Transaction，参见Full Hibernate Plug-in 1.4 GA

这里你可以通过创建一个HibernateUtil类来获取SessionFactory。

*/
?@SessionTarget
?private Session session;
?@TransactionTarget
?private Transaction transaction;

?public void deleteById(int id) {
??try{
???User user=(User) session.get(User.class, id);
???session.delete(user);
??}catch (Exception e) {
??}
?}

?public User findById(int id) {
??try{
???User user=(User) session.get(User.class, id);
???return user;
??}catch (Exception e) {
???e.printStackTrace();
???return null;
??}
?}

?public List<User> listUsers() {
??List<User> users=null;
??try{
???users=session.createQuery("from User").list();
??}catch (Exception e) {
???e.printStackTrace();
??}
??return users;
?}

?public void saveUser(User user) {
??try {
???session.saveOrUpdate(user);
??} catch (Exception e) {
???transaction.rollback();
???e.printStackTrace();
??}
?}

}

?????????? 1、获取SessionFactory的另外的HibernateUtil类

package com.test.util;

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUitl {
?private static SessionFactory sessionFactory;
?static {
??try {
???sessionFactory = new Configuration().configure()
?????.buildSessionFactory();
??} catch (Exception e) {
???e.printStackTrace();
??}
?}

?public static SessionFactory getSessionFactory() {
??return sessionFactory;
?}
}

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3、Action类，UserAction类

在UserAction中通ActionContext.getContext().get(ServletActionContext. HTTP_REQUEST)获取HttpServletRequest对象。

package com.test.action;

import java.util.ArrayList;
import java.util.List;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.test.dao.UserDaoImpl;
import com.test.model.User;

public class UserAction extends ActionSupport implements ModelDriven<User> {
?private User user = new User();
?private List<User> users = new ArrayList<User>();
?private UserDaoImpl userDaoImpl = new UserDaoImpl();

?public User getModel() {
??return user;
?}

?public String add() {
??userDaoImpl.saveUser(user);
??return SUCCESS;
?}

?public String list() {
??users = userDaoImpl.listUsers();
??return SUCCESS;
?}

?public User getUser() {
??return user;
?}

?public void setUser(User user) {
??this.user = user;
?}

?public List<User> getUsers() {
??return users;
?}

?public void setUsers(List<User> users) {
??this.users = users;
?}

}

?4、Struts.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
?<package name="default" extends="hibernate-default">
??<action name="saveOrUpdate" method="saveOrUpdate" type="redirect">listUser</result>
??</action>
??<action name="editUser" method="edit" method="delete" name="success">listUser</result>
??</action>
??<action name="listUser" method="list" />
???<result name="success">/register.jsp</result>
??</action>
?</package>
</struts>

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5、web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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">
?<filter>
??<filter-name>struts</filter-name>
??<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
?</filter>
?<filter-mapping>
??<filter-name>struts</filter-name>
??<url-pattern>/*</url-pattern>
?</filter-mapping>
? <welcome-file-list>
??? <welcome-file>index.jsp</welcome-file>
? </welcome-file-list>
</web-app>

6、页面register.jsp

这里页面代码就不贴出来了

?综上就是一个完整的Struts2与Hibernate3.0的整合CRUDE实例。并附代码lib包下载。给大家推荐一个很好的Struts1、2。hibernate，Spring实例网站。http://www.vaannila.com/