（7）Spring对JDBC的支持

标签：spring

使用Spring JDBC的步骤

1、引入jar包

    spring-jdbc-3.2.5.RELEASE.jar

    spring-tx-3.2.5.RELEASE.jar

    c3p0-0.9.1.2.jar

    mysql-connector-java-5.1.38-bin.jar

2、配置

    c3p0数据库连接池的配置

    JdbcTemplate对象

    Dao对象

3、测试

applicationContext.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: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://127.0.0.1:3306/test"></property>
		<property name="user" value="root"></property>
		<property name="password" value="root"></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">
		<constructor-arg index="0" type="javax.sql.DataSource" ref="dataSource"></constructor-arg>
	</bean>
	
	<!-- dao 实例 -->
	<bean id="deptDao" class="com.rk.hibernate.i_jdbc.DepartmentDao">
		<property name="jdbcTemplate" ref="jdbcTemplate"></property>
	</bean>
	
</beans>

Department.java

package com.rk.hibernate.i_jdbc;

public class Department
{
	private int deptId;
	private String deptName;
	private int version;
	
	public int getDeptId()
	{
		return deptId;
	}
	public void setDeptId(int deptId)
	{
		this.deptId = deptId;
	}
	public String getDeptName()
	{
		return deptName;
	}
	public void setDeptName(String deptName)
	{
		this.deptName = deptName;
	}
	public int getVersion()
	{
		return version;
	}
	public void setVersion(int version)
	{
		this.version = version;
	}
	@Override
	public String toString()
	{
		return "Department [deptId=" + deptId + ", deptName=" + deptName + ", version=" + version + "]";
	}
	
}

DepartmentDao.java

package com.rk.hibernate.i_jdbc;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

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

public class DepartmentDao
{
	private JdbcTemplate jdbcTemplate;

	public void setJdbcTemplate(JdbcTemplate jdbcTemplate)
	{
		this.jdbcTemplate = jdbcTemplate;
	}
	
	public void save()
	{
		String sql = "INSERT INTO T_Department(name,dept_version) values(?,?)";
		jdbcTemplate.update(sql, "Tom",0);
	}
	
	public Department findById(int id)
	{
		String sql = "SELECT * FROM T_Department where id=?";
		List<Department> list = jdbcTemplate.query(sql,new MyResult(),id);
		return (list != null && list.size()>0) ? list.get(0) : null;
	}
	
	public List<Department> findAll()
	{
		String sql = "SELECT * FROM T_Department";
		List<Department> list = jdbcTemplate.query(sql, new MyResult());
		return list;
	}
}

class MyResult implements RowMapper<Department>
{
	@Override
	public Department mapRow(ResultSet rs, int rowNum) throws SQLException
	{
		int id = rs.getInt("id");
		String name = rs.getString("name");
		int dept_version = rs.getInt("dept_version");

		Department dept = new Department();
		dept.setDeptId(id);
		dept.setDeptName(name);
		dept.setVersion(dept_version);
		return dept;
	}
}

App.java

package com.rk.hibernate.i_jdbc;

import java.util.List;

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

public class App
{
	private ApplicationContext ac = new ClassPathXmlApplicationContext("/com/rk/hibernate/i_jdbc/applicationContext.xml");
	
	@Test
	public void test()
	{
		DepartmentDao deptDao = (DepartmentDao) ac.getBean("deptDao");
		//1. 保存
//		deptDao.save();
		//2.根据id进行查询
//		Department dept = deptDao.findById(9);
//		System.out.println(dept);
		//3.查询所有
		List<Department> list = deptDao.findAll();
		System.out.println(list.size());
		System.out.println(list);
	}
}

（7）Spring对JDBC的支持

标签：spring

原文地址：http://lsieun.blog.51cto.com/9210464/1829123