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()); ;
         }
 }