這篇接著上篇，把沒貼完的程式碼寫完，上篇主要完成了一些公共配置和介面的東西，這篇把後臺的程式碼完成。

首先是web包下屬於的control層的類UserController，這相當於Struts中的Action，是重要的類：

package com.tgb.web;

import java.io.IOException;
import java.io.PrintWriter;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.tgb.entity.User;
import com.tgb.manager.UserManager;

@Controller
@RequestMapping("/user")
public class UserController {

	@Resource(name="userManager")
	private UserManager userManager;

	@RequestMapping("/getAllUser")
	public String getAllUser(HttpServletRequest request){
		
		request.setAttribute("userList", userManager.getAllUser());
		
		return "/index";
	}
	
	@RequestMapping("/getUser")
	public String getUser(String id,HttpServletRequest request){
		
		request.setAttribute("user", userManager.getUser(id));
	
		return "/editUser";
	}
	
	@RequestMapping("/toAddUser")
	public String toAddUser(){
		return "/addUser";
	}
	
	@RequestMapping("/addUser")
	public String addUser(User user,HttpServletRequest request){
		
		userManager.addUser(user);
		
		return "redirect:/user/getAllUser";
	}
	
	@RequestMapping("/delUser")
	public void delUser(String id,HttpServletResponse response){
		
		String result = "{\"result\":\"error\"}";
		
		if(userManager.delUser(id)){
			result = "{\"result\":\"success\"}";
		}
		
		response.setContentType("application/json");
		
		try {
			PrintWriter out = response.getWriter();
			out.write(result);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	@RequestMapping("/updateUser")
	public String updateUser(User user,HttpServletRequest request){
		
		if(userManager.updateUser(user)){
			user = userManager.getUser(user.getId());
			request.setAttribute("user", user);
			return "redirect:/user/getAllUser";
		}else{
			return "/error";
		}
	}
}
 

然後是屬於manager包下的業務邏輯類，介面UserManager：

package com.tgb.manager;

import java.util.List;

import com.tgb.entity.User;

public interface UserManager {

	public User getUser(String id);
	
	public List<User> getAllUser();
	
	public void addUser(User user);
	
	public boolean delUser(String id);
	
	public boolean updateUser(User user);
}
 

實現類UserManagerImpl：

package com.tgb.manager;

import java.util.List;

import com.tgb.dao.UserDao;
import com.tgb.entity.User;

public class UserManagerImpl implements UserManager {

	private UserDao userDao;
	
	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public User getUser(String id) {
		return userDao.getUser(id);
	}

	@Override
	public List<User> getAllUser() {
		return userDao.getAllUser();
	}

	@Override
	public void addUser(User user) {
		userDao.addUser(user);
	}

	@Override
	public boolean delUser(String id) {
		
		return userDao.delUser(id);
	}

	@Override
	public boolean updateUser(User user) {
		return userDao.updateUser(user);
	}

}
 

最後是屬於dao包底下的DAO層，主要由Hibernate完成。介面UserDao：

package com.tgb.dao;

import java.util.List;

import com.tgb.entity.User;

public interface UserDao {

	public User getUser(String id);
	
	public List<User> getAllUser();
	
	public void addUser(User user);
	
	public boolean delUser(String id);
	
	public boolean updateUser(User user);
}

實現類UserDaoImpl：

package com.tgb.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.SessionFactory;

import com.tgb.entity.User;

public class UserDaoImpl implements UserDao {

	private SessionFactory sessionFactory;

	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}
	
	@Override
	public User getUser(String id) {
		
		String hql = "from User u where u.id=?";
		Query query = sessionFactory.getCurrentSession().createQuery(hql);
		query.setString(0, id);
		
		return (User)query.uniqueResult();
	}

	@Override
	public List<User> getAllUser() {
		
		String hql = "from User";
		Query query = sessionFactory.getCurrentSession().createQuery(hql);
		
		return query.list();
	}

	@Override
	public void addUser(User user) {
		sessionFactory.getCurrentSession().save(user);
	}

	@Override
	public boolean delUser(String id) {
		
		String hql = "delete User u where u.id = ?";
		Query query = sessionFactory.getCurrentSession().createQuery(hql);
		query.setString(0, id);
		
		return (query.executeUpdate() > 0);
	}

	@Override
	public boolean updateUser(User user) {
		
		String hql = "update User u set u.userName = ?,u.age=? where u.id = ?";
		Query query = sessionFactory.getCurrentSession().createQuery(hql);
		query.setString(0, user.getUserName());
		query.setString(1, user.getAge());
		query.setString(2, user.getId());
		
		return (query.executeUpdate() > 0);
	}

}

最後外加一個配置spring-beans.xml，放在config.spring包下，負責為各層依賴注入需要的物件：

<?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">
	
	<bean id="userDao" class="com.tgb.dao.UserDaoImpl">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>

	<bean id="userManagerBase" class="com.tgb.manager.UserManagerImpl">
		<property name="userDao" ref="userDao"></property>
	</bean>
	
	<!-- 此處為代理 -->
	<bean name="userManager" parent="transactionProxy">
		<property name="target" ref="userManagerBase"></property>
	</bean>	
</beans>

到此為止，所有的配置和程式碼完成，部署—執行，執行結果如下圖：

這個小例項結束，下篇將對SpringMVC和Struts2做一個對比。