Spring数据访问层Dao案例

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;

@Repository
public class UserDao {
    
    @Autowired
    private JdbcTemplate jdbcTemplate;


    public int getMatchCount(String userName, String password) {
        String sqlStr = " SELECT count(*) FROM t_user "
                + " WHERE user_name =? and password=? ";
//        return jdbcTemplate.queryForInt(sqlStr, new Object[] { userName, 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.getInt("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()});
    }

    public void insertUserInfo() {
        String sqlStr = "insert into t_user(user_name,password)"
                + "values(‘liushaocun‘,‘405424‘)";
        jdbcTemplate.execute(sqlStr);
        
        
    }
}

<?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">
    
    <!-- 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.lsc.SpringJDBC"/>
    
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close" 
        p:driverClassName="com.mysql.jdbc.Driver"
        p:url="jdbc:mysql://localhost:3306/sampledb" 
        p:username="root"
        p:password="405424" />

    <!-- 配置Jdbc模板  -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
        p:dataSource-ref="dataSource" />
        
    <bean id="userDao" class="com.lsc.SpringJDBC.UserDao"/> 
    <!-- 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.lsc.SpringJDBC..*(..))" />
        <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>
</beans>

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * Hello world!
 *
 */
public class App 
{
    public static void main(String[] args) {
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDao dao = (UserDao) app.getBean("userDao");
        dao.insertUserInfo();
    }
    
}