spring3.1 mvc jdbc 合成
代码详见:
实现用户的登录和注册功能：
package com.model;
import java.io.Serializable;
/**
* 模型层
* @author qiyang
*
*/
@SuppressWarnings("serial")
public class User implements Serializable {
//http://my.oschina.net/huangcongmin12/blog/81216
private int id;
private String userName;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return id+", "+userName+", "+password;
}
}
package com.dao.implement;
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.dao.UserDao;
import com.model.User;
/**
*
* @author qiyang
* 数据层
*/
@Repository
public class UserDaoImpl implements UserDao {
@Autowired
private JdbcTemplate jdbcTemplate;
/**find user by username*/
public User findUserByUserName(String userName) {
String sqlStr = "select id,uname,pwd from user where uname=?";
//注意此处为何如此写？
final User user = new User();
jdbcTemplate.query(sqlStr, new Object[]{userName},new RowCallbackHandler(){
public void processRow(ResultSet rs) throws SQLException {
user.setId(rs.getInt("id"));
user.setUserName(rs.getString("uname"));
user.setPassword(rs.getString("pwd"));
}
});
return user;
}
/**register*/
public void register(User user) {
String sqlStr = "insert into user(uname,pwd) values(?,?)";
Object [] params = new Object[]{user.getUserName(),user.getPassword()};
jdbcTemplate.update(sqlStr,params);
}
}
package com.service.implement;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.dao.UserDao;
import com.model.User;
import com.service.UserService;
/**
* 业务层
* @author qiyang
*
*/
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
public User loginCheck(User user) {
//此处获得的 u 会为空吗？如果会，程序有可能跑异常哦
User u = userDao.findUserByUserName(user.getUserName());
System.out.println("id="+u.getId()+", userName="+u.getUserName()+", Password="+u.getPassword());
if(user.getPassword().equals(u.getPassword())){
return u;
}else{
return null;
}
}
public boolean register(User user) {
//此处先查询用户名是否已经存在
User u = userDao.findUserByUserName(user.getUserName());
if(u.getId()==0){
//注册
userDao.register(user);
return true;
}else{
System.out.println("用户已经存在！");
System.out.println("id="+u.getId()+", userName="+u.getPassword()+", Password="+u.getPassword());
return false;
}
}
}
package com.controller;
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.model.User;
import com.service.UserService;
/**
* 表示层--控制器
* @author qiyang
*
*/
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/user/loginView")
public String loginView(){
return "login";
}
@RequestMapping("/user/registView")
public String registView(){
return "register";
}
@RequestMapping("/user/login")
public ModelAndView login(User user){
System.out.println("用户登录！！！");
ModelAndView mav = new ModelAndView();
User u = userService.loginCheck(user);
System.out.println(u);
if(null==u){
System.out.println("登录失败了........");
//登录失败
mav.setViewName("login");
mav.addObject("errorMsg", "用户名或密码错误！");
return mav;
}else{
//登录成功
System.out.println("登录成功了........");
mav.setViewName("success");
mav.addObject("user",u);
return mav;
}
}
@RequestMapping("/user/register")
public ModelAndView register(User user){
ModelAndView mav = new ModelAndView();
if(userService.register(user)){
//注册成功
mav.setViewName("register_succ");
return mav;
}else{
//注册失败
mav.setViewName("register");
mav.addObject("errorMsg","用户名已经被占用");
return mav;
}
}
}
主要配置文件：
beans.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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- jdbc.properties配置信息 文件路径 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!-- 扫描类包 将标注Spring 注解的类自动转换成bean ，同时完成注入 -->
<context:component-scan base-package="com.controller"/>
<context:component-scan base-package="com.service"/>
<context:component-scan base-package="com.dao"/>
<!-- 配置数据源 -->
<bean id="dataSource" destroy-method="close" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass">
<value>${jdbc.driverClassName}</value>
</property>
<property name="jdbcUrl">
<value>${jdbc.url}</value>
</property>
<property name="user">
<value>${jdbc.username}</value>
</property>
<property name="password">
<value>${jdbc.password}</value>
</property>
<!-- 连接池中保留的最小连接 -->
<property name="minPoolSize">
<value>5</value>
</property>
<!-- 连接池中保留最大连接数(default 15) -->
<property name="maxPoolSize">
<value>30</value>
</property>
<!-- 初始化时，获取的连接数 应该在minPoolSize and maxPoolSize之间 default 3 -->
<property name="initialPoolSize">
<value>10</value>
</property>
<!-- 最大空闲时间，n妙内未使用则丢弃，0则永远不丢弃 default0 -->
<property name="maxIdleTime">
<value>60</value>
</property>
<!-- 连接池中连接耗尽时 c3p0一次获得的连接数 default 3-->
<property name="acquireIncrement">
<value>5</value>
</property>
<!-- JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。
但由于预缓存的statements 属于单个connection而不是整个连接池。所以设置这
个参数需要考虑到多方面的因素,如果maxStatements与maxStatementsPerC
onnection均为0，则缓存被关闭。Default: 0-->
<property name="maxStatements">
<value>0</value>
</property>
<!-- 每隔n妙检查连接初中的空闲数 default:0 -->
<property name="idleConnectionTestPeriod">
<value>60</value>
</property>
<!-- 获取新连接失败后，尝试的次数 30 -->
<property name="acquireRetryAttempts">
<value>30</value>
</property>
</bean>
<!-- 配置jdbc模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置事物管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 通过aop配置提供事务增强 让 service包下所有bean 的方法拥有事务 -->
<!-- expression="execution(* *..*Service.*(..))"
第一个* 表示任意返回值类型
第二个* 表示以任意名字开头的package. 如 com.xx.
第三个* 表示以任意名字开头的class的类名 如TestService
第四个* 表示 通配 *service下的任意class
最后二个.. 表示通配 方法可以有0个或多个参数
-->
<aop:config proxy-target-class="true" >
<aop:pointcut id="serviceMethod" expression="execution(* com.service.*.*(..))" />
<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice"/>
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- 启动spring mvc的注解功能 完成请求和注解pojo的映射-->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
jdbc.properties:
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=*****
页面部分：
登录：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>login</title>
</head>
<body>
<form action="login.do" method="post">
<h1 align="center">Login</h1>
<table border="1" width="400" align="center">
<tr>
<td colspan="2"><c:if test="${!empty errorMsg}">
<font size="2" color="red">${errorMsg}</font>
</c:if>
</td>
</tr>
<tr>
<td>uname:</td><td><input type="text" name="userName"></td>
</tr>
<tr>
<td>pwd:</td><td><input type="password" name="password"><br/></td>
</tr>
<tr>
<td></td><td><input type="submit" value="login">
<a href="registView.do">register</a>
</td>
</tr>
</table>
</form>
</body>
</html>
注册页面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>login</title>
</head>
<body>
<form action="register.do" method="post">
<h1 align="center">Register</h1>
<table border="1" width="400" align="center">
<tr>
<td colspan="2"><c:if test="${!empty errorMsg}">
<font size="2" color="red">${errorMsg}</font>
</c:if>
</td>
</tr>
<tr>
<td>uname:</td><td><input type="text" name="userName"></td>
</tr>
<tr>
<td>pwd:</td><td><input type="password" name="password"><br/></td>
</tr>
<tr>
<td></td><td><input type="submit" value="register" /></td>
</tr>
</table>
</form>
</body>
</html>
成功页面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>login</title>
</head>
<body>
<h1>亲爱的${user.userName }，登录成功！</h1>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>login</title>
</head>
<body>
<h1>注册成功！</h1>
<a href="loginView.do">返回登录页面</a>
</body>
</html>
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- 装载spring组件 -->
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<!-- 装载spring mvc -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!-- 编码过滤器 -->
<filter>
<filter-name>setcharacter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>setcharacter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>