Spring 对JDBC的支持（JdbcTemplate）

Spring对数据库的操作，使用JdbcTemplate对象

需要引入相关的jar文件

　　如版本：（Spring核心jar包就不列了）

　　spring-jdbc-3.2.5.RELEASE.jar

　　spring-tx-3.2.5.RELEASE.jar

　　C3P0连接池：c3p0-0.9.1.2.jar

　　数据库驱动包：mysql-connector-java-5.1.22-bin.jar

例：（对象的获取及注入通过spring来实现）

核心jdbc操作

package test.jdbc;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.Map;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

public class StudentDao {

    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
    
    public Student getOneById(String id){
        List<Student> list = jdbcTemplate.query(
                "select * from student where id = ?"
                , new objectRowMapper()
                , id);
        return (list!=null && list.size() > 0) ?list.get(0):null;
    }
    public List<Student> getAll(){
        List<Student> list = jdbcTemplate.query(
                "select * from student"
                , new objectRowMapper());
        return list;
    }
    
    class objectRowMapper implements RowMapper<Student>{

        public Student mapRow(ResultSet rs, int index) throws SQLException {
            Student std = new Student();
            std.setId(rs.getInt("id"));
            std.setSname(rs.getString("sname"));
            std.setSclass(rs.getInt("sclass"));
            if(rs.getTimestamp("startdate")!=null){
                std.setStartdate(new java.util.Date(rs.getTimestamp("startdate").getTime()) );
            }
            if(rs.getDate("stopdate")!=null){
                std.setStopdate(rs.getDate("stopdate"));
            }
            System.out.println(index);
            return std;
        }
        
    }
}

Student实体类：

package test.jdbc;

import java.util.Date;

public class Student {
    private int sid;
    private String sname;
    private int sclass;
    private Date startdate;
    private Date stopdate;

    public int getId() {
        return sid;
    }
    public void setId(int id) {
        this.sid = id;
    }
    
    public Date getStartdate() {
        return startdate;
    }
    public void setStartdate(Date startdate) {
        this.startdate = startdate;
    }
    public Date getStopdate() {
        return stopdate;
    }
    public void setStopdate(Date stopdate) {
        this.stopdate = stopdate;
    }
    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public int getSclass() {
        return sclass;
    }
    public void setSclass(int sclass) {
        this.sclass = sclass;
    }
    @Override
    public String toString() {
        return "Student [sid=" + sid + ", sname=" + sname + ", sclass="
                + sclass + ", startdate=" + startdate + ", stopdate="
                + stopdate + "]";
    }
    
}

bean.xml（Spring容器对象配置文件）

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    
    <!-- 1. 数据源对象: C3P0连接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test01"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="10"></property>
        <property name="maxStatements" value="100"></property>
        <property name="acquireIncrement" value="2"></property>
    </bean>
    
    <!-- 2. 创建JdbcTemplate对象 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- dao 实例 -->
    <bean id="studentDao" class="test.jdbc.StudentDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
</beans> 

测试类

public class App {
        // 容器对象
        ApplicationContext ac = new ClassPathXmlApplicationContext("test/jdbc/bean.xml");
        
        @Test
        public void testApp() throws Exception {
            StudentDao std = (StudentDao) ac.getBean("studentDao");
            std.getOneById("13");
            System.out.println(std.getAll()); ;
        }
}