SpringMVC +Spring+ SpringJDBC整合实例。文件结构：

 

3S3（3Spring3.x）的整合大致如下：

1）web.xml的配置：

 

<?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_3_0.xsd" version="3.0">    <display-name></display-name>    <welcome-file-list>      <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <listener>      <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>    </listener>    <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>    <!-- 统一字符编码为UTF-8 -->    <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>

 2）applicationContext.xml的配置：

<?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:p="http://www.springframework.org/schema/p"   xmlns:context="http://www.springframework.org/schema/context"   xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"   xsi:schemaLocation="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-3.0.xsd         http://www.springframework.org/schema/tx          http://www.springframework.org/schema/tx/spring-tx-3.0.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">     <context:property-placeholder location="classpath:jdbc.properties" />     <!-- 扫描类包，将标注Spring注解的类自动转化Bean，同时完成Bean的注入 -->   <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" class="com.mchange.v2.c3p0.ComboPooledDataSource"    destroy-method="close">    <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数。 -->    <property name="minPoolSize">     <value>5</value>    </property>    <!--连接池中保留的最大连接数。Default: 15 -->    <property name="maxPoolSize">     <value>30</value>    </property>    <!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->    <property name="initialPoolSize">     <value>10</value>    </property>    <!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->    <property name="maxIdleTime">     <value>60</value>    </property>    <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。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maxStatementsPerConnection均为0，则缓存被关闭。Default: 0 -->    <property name="maxStatements">     <value>0</value>    </property>    <!--每60秒检查所有连接池中的空闲连接。Default: 0 -->    <property name="idleConnectionTestPeriod">     <value>60</value>    </property>    <!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->    <property name="acquireRetryAttempts">     <value>30</value>    </property>    <!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试      获取连接失败后该数据源将申明已断开并永久关闭。Default: false -->    <property name="breakAfterAcquireFailure">     <value>true</value>    </property>    <!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable      等方法来提升连接测试的性能。Default: false -->    <property name="testConnectionOnCheckout">     <value>false</value>    </property>   </bean>     <!-- 配置Jdbc模板 -->   <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">    <property name="dataSource" ref="dataSource"></property>   </bean>     <!-- 配置事务管理器 -->   <bean id="transactionManager"    class="org.springframework.jdbc.datasource.DataSourceTransactionManager"    p:dataSource-ref="dataSource" />     <!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->   <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"    p:viewClass="org.springframework.web.servlet.view.JstlView" p:prefix="/WEB-INF/jsp/"    p:suffix=".jsp" />    </beans>

3）jdbc.properties的配置:

jdbc.driverClassName=com.mysql.jdbc.Driver  jdbc.url=jdbc:mysql://localhost:3306/test2  jdbc.username=root  jdbc.password=123456

4)log4j.properties的配置:

log4j.rootLogger=DEBUG,A1  # \u8f93\u51fa\u5230\u63a7\u5236\u53f0   log4j.appender.A1=org.apache.log4j.ConsoleAppender   log4j.appender.A1.layout=org.apache.log4j.PatternLayout   log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} [\u65E5\u5FD7\u4FE1\u606F] %m%n

 5)User.java

package com.model;    import java.io.Serializable;    @SuppressWarnings("serial")  public class User implements Serializable {      private int id;   private String userName;   private String password;      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;   }   public int getId() {    return id;   }   public void setId(int id) {    this.id = id;   }       }

6)UserController.java

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;    @Controller  public class UserComtroller {      @Autowired   private UserService userService;      @RequestMapping("/user/loginView")   public String loginView(){    return "login";   }      @RequestMapping("/user/registerView")   public String registerView(){    return "register";   }      @RequestMapping("/user/login")   public ModelAndView login(User user){    ModelAndView mav = new ModelAndView();    User u = userService.loginCheck(user);    if(null==u){     mav.setViewName("login");     mav.addObject("errorMsg","用户名或密码有误！");     return mav;    }    else{     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)){     mav.setViewName("register_succ");     return mav;    }    else{     mav.setViewName("register");     mav.addObject("errorMsg","用户名已被占用，请更换！！");     return mav;    }   }  }

7)UserService Interface

package com.service;    import com.model.User;      public interface UserService {   public boolean register(User user);   public User loginCheck(User user);  }

8)UserServiceImp.java

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;    @Service  public class UserServiceImpl implements UserService {     @Autowired   private UserDao userDao;      @Override   public User loginCheck(User user) {    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;    }   }     @Override   public boolean register(User user) {    User u =  userDao.findUserByUserName(user.getUserName());    if(u.getId()==0){     userDao.register(user);     return true;    }    else{     System.out.println("id="+u.getId()+",  userName="+u.getUserName()+", password="+u.getPassword());     return false;    }   }    }

9)UserDao Interface

package com.dao;    import com.model.User;    public interface UserDao {   public void register(User user);   public User findUserByUserName(final String userName);  }

10)UserDaoImpl.java

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;    @Repository  public class UserDaoImpl implements UserDao {      @Autowired   private JdbcTemplate jdbcTemplate;     @Override   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);   }     @Override   public User findUserByUserName(String userName) {    String sqlStr = "select id,uname,pwd from user where uname=?";    final User user = new User();    jdbcTemplate.query(sqlStr, new Object[]{userName}, new RowCallbackHandler() {     @Override     public void processRow(ResultSet rs) throws SQLException {      user.setId(rs.getInt("id"));      user.setUserName(rs.getString("uname"));      user.setPassword(rs.getString("pwd"));     }    });    return user;   }    }

11）单元测试：test/com.service.implement

-UserServiceImplTest.java

package com.service.implement;    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.model.User;  import com.service.UserService;      @RunWith(SpringJUnit4ClassRunner.class)  @ContextConfiguration(locations="/applicationContext.xml")  public class UserServiceTest {      @Autowired   private UserService userService;      @Test   public void testLoginCheck(){    User user = new User();    user.setUserName("manager2");    user.setPassword("123");    if(null!=userService.loginCheck(user))     System.out.println("------OK!!-----");    else     System.out.println("------Sorry!!-----");   }      @Test   public void testRegister(){    User user = new User();    user.setUserName("manager");    user.setPassword("123");    System.out.println(userService.register(user));   }    }

12）测试结果：