第二章 Spring 入门 Demo

实现步骤

• 初始化MySQL数据库 建立库表并初始化数据
• 编码domain、dao、service包下class
• applicationContext.xml 配置(配置数据源、注册Bean、事务控制)
• 测试业务层逻辑
• POJO 控制层业务编码
• web.xml 配置(初始化applicationContext.xml、监听请求、处理MVC url)

demo目录

• src
  • com
    • baobaotao
      • dao
      • domain
      • service
      • web
    • applicationContext.xml
    • log4j.properties
• test
  • com
    • baobaotao
      • service

初始化MySQL数据库 建立库表并初始化数据

创建用户表
  CREATE TABLE `t_user` (
    `user_id` bigint(22) NOT NULL COMMENT '用户主键',
    `user_name` varchar(30) DEFAULT NULL COMMENT '用户名称',
    `credits` int(11) DEFAULT NULL,
    `password` varchar(32) DEFAULT NULL COMMENT '密码',
    `last_visit` datetime DEFAULT NULL,
    `last_ip` varchar(23) DEFAULT NULL,
    PRIMARY KEY (`user_id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8
  
登录记录表
  CREATE TABLE `t_login_log` (
   `login_log_id` bigint(22) NOT NULL COMMENT '日志主键',
    `user_id` bigint(22) DEFAULT NULL COMMENT '用户主键',
    `ip` varchar(23) DEFAULT NULL,
    `login_datetime` datetime DEFAULT NULL,
    PRIMARY KEY (`login_log_id`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8
	
初始化数据
  insert into t_user (user_name,password) values("amdin","123456");

编码domain、dao、service包下class

• domain 领域对象

package com.baobaotao.domain;

import java.io.Serializable;
import java.util.Date;

import lombok.Getter;
import lombok.Setter;
/**
 *用户领域对象
 */
@Getter
@Setter
public class User implements Serializable{
	private static final long serialVersionUID = 1L;
	private Long userId;
	private String userName;
	private String password;
	private int credits;
	private String lastIp;
	private Date lastVisit;
}

package com.baobaotao.domain;

import java.io.Serializable;
import java.util.Date;

import lombok.Getter;
import lombok.Setter;
/**
*登录日志领域对象
*/
@Getter
@Setter
public class LoginLog implements Serializable{
	private static final long serialVersionUID = 1L;
	private Long loginLogId;
	private Long userId;
	private String ip;
	private Date loginDate;

}

• dao 数据操作

package com.baobaotao.dao;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.stereotype.Repository;

import com.baobaotao.domain.User;

/**
 *用户信息操作
 */
@Repository//通过Spring注解定义一个Dao
public class UserDao {

	@Autowired//自动注入jdbcTemplate的Bean
	private JdbcTemplate jdbcTemplate;
	
	public int getMatchCount(String userName, String password) {
		String sqlStr = "SELECT COUNT(*) FROM t_user WHERE user_name=? AND PASSWORD=?";
		return jdbcTemplate.queryForObject(sqlStr, new Object[] {userName,password}, Integer.class);
	}
	
	public User findUserByUserName(final String userName) {
		String sqlStr = "SELECT user_id,user_name,credits FROM t_user WHERE user_name=?";
		final User user = new User();
		jdbcTemplate.query(sqlStr, new Object[] { userName }, new RowCallbackHandler(){
			public void processRow(ResultSet rs) throws SQLException {
				user.setUserId(rs.getLong("user_id"));
				user.setUserName(userName);
				user.setCredits(rs.getInt("credits"));
			}
		});
		return user;
	}
	
	public void updateLoginInfo(User user) {
		String sqlStr = "UPDATE t_user SET last_visit=?,last_ip=?,credits=? WHERE user_id=?";
		jdbcTemplate.update(sqlStr, new Object[] {
			user.getLastVisit(), user.getLastIp(), user.getCredits(), user.getUserId()	
		});
	}
}

package com.baobaotao.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import com.baobaotao.domain.LoginLog;

/**
*用户信息操作
*/
@Repository
public class LoginLogDao {
	
	@Autowired
	private JdbcTemplate jdbcTemplate;
	
	public void insertLoginLog(LoginLog loginLog) {
		String sqlStr = "INSERT INTO t_login_log(login_log_id,user_id,ip,login_datetime)  VALUES (?,?,?,?)";
		Object[] args = { loginLog.getLoginLogId(), loginLog.getUserId(), loginLog.getIp(), loginLog.getLoginDate()};
		jdbcTemplate.update(sqlStr, args);
	}
}

• UserService 业务层

package com.baobaotao.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.baobaotao.dao.LoginLogDao;
import com.baobaotao.dao.UserDao;
import com.baobaotao.domain.LoginLog;
import com.baobaotao.domain.User;

@Service //将UserService标注为一个服务层的Bean
public class UserService {

	@Autowired
	private UserDao userDao;
	
	@Autowired
	private LoginLogDao loginLogDao;
	
	public boolean hasMatchUser(String userName, String password) {
		int matchCount = userDao.getMatchCount(userName, password);
		return matchCount > 0;
	}
	
	public User findUserByUserName(String userName) {
		return userDao.findUserByUserName(userName);
	}
	
	public void loginSuccess(User user) {
		user.setCredits(5 + user.getCredits());
		LoginLog loginLog = new LoginLog();
		loginLog.setLoginLogId(8L);
		loginLog.setUserId(user.getUserId());
		loginLog.setIp(user.getLastIp());
		loginLog.setLoginDate(user.getLastVisit());
		userDao.updateLoginInfo(user);
		loginLogDao.insertLoginLog(loginLog);
	}
}

applicationContext.xml 配置(配置数据源、注册Bean、事务控制)

单元测试 测试业务层逻辑

package com.baobaotao.service;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.baobaotao.domain.User;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations= {"/applicationContext.xml"})
public class TestUserService {

	@Autowired
	private UserService userService;
	
	@Test
	public void hasMatchUser() {
		boolean b1 = userService.hasMatchUser("admin", "123456");
		boolean b2 = userService.hasMatchUser("admin", "111111");
		System.err.println("==================" + b1 + "  &  "+ b2);
		assertTrue(b1);
		assertTrue(b2);
	}
	
	@Test
	public void findUserByUserName() {
		User user = userService.findUserByUserName("admin");
		System.err.println(user);
		userService.loginSuccess(user);
		assertEquals(user.getUserName(), "admin");
	}
}

POJO 控制层业务编码

package com.baobaotao.web;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class LoginCommand {
	private String userName;
	private String password;
}

package com.baobaotao.web;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.baobaotao.domain.User;
import com.baobaotao.service.UserService;

//@1 表主成为一个Spring MVC的Controller
@Controller
public class LoginController {

	@Autowired
	private UserService userService;
	
	//@2 负责处理/index.html的请求
	@RequestMapping(value="/index.html")
	public String loginPage() {
		return "login";
	}
	
	//@3 负责处理/loginCheck.html
	@RequestMapping(value="/loginCheck.html")
	public ModelAndView loginCheck(HttpServletRequest request, LoginCommand loginCommand) {
		boolean isValidUser = userService.hasMatchUser(loginCommand.getUserName(), loginCommand.getPassword());
		if(!isValidUser) {
			return new ModelAndView("login","error","用户名或密码错吗");
		}else {
			User user = userService.findUserByUserName(loginCommand.getUserName());
			user.setLastIp(request.getRemoteAddr());
			user.setLastVisit(new Date());
			userService.loginSuccess(user);
			request.getSession().setAttribute("user", user);
			return new ModelAndView("main");
		}
	}
}

web.xml 配置(初始化applicationContext.xml、监听请求、处理MVC url)

  chapter
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
  
  
  	contextConfigLocation
  	
  		classpath:applicationContext.xml	
  	
  
  
  
  
  	
  		org.springframework.web.context.ContextLoaderListener
  	
  
  
  
  
  	baobaotao
  	
  		org.springframework.web.servlet.DispatcherServlet
  	
  	2
  
  
  
  
  	baobaotao
  	*.html
  

• baobaotao-servlet.xml

页面

• login.jsp 登录页面

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix='c' %>


  
    
  
  
  
  	
  		
  	
  	
  	
" method="post">
  		用户名：
  		
  		

  		密 码：
		
		

		
		  	
  	
  

• main.jsp 登录成功主要

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix='c' %>


  
    
  
  
  
    ${user.userName },欢迎您进入宝宝淘论坛，您当前积分为${user.credits };