Spring学习之JdbcTemplate笔记2(使用注解)

最新推荐文章于 2024-03-20 10:53:27 发布

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本文介绍如何使用Spring框架的JdbcTemplate进行数据库操作，包括配置数据源、实现DAO层与Service层，并通过IOC容器管理Bean。示例代码展示了添加用户数据的过程。

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service层：业务层(业务逻辑)
dao层：持久层(直接操作数据库)

创建service对象

package jdbctemplateioc;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service("userService2")
public class UserService2 {
	@Autowired
	private UserDao2 userDao2;
	public void add(){
		userDao2.add();
	}
}

创建dao对象

package jdbctemplateioc;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

@Component("userDao2")
public class UserDao2 {
	@Autowired
	private JdbcTemplate jdbcTemplate;
	public void add(){
		String sql="insert into user values(?,?)";
		int rows=jdbcTemplate.update(sql, "王小明","147258");
		if(rows>0)System.out.println("成功");
		else System.out.println("失败");
	}
}

创建jdbctemplateioc2.xml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:aop="http://www.springframework.org/schema/aop"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        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/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" >	
        <!-- 连接池配置 --><!--需要导入c3p0jar包  -->
        <context:component-scan base-package="jdbctemplateioc"></context:component-scan><!--开启注解  -->
        <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:3307/spring?useUnicoding=true&amp;characterEncoding=utf8&amp;useSSL=false"></property>
          <property name="user" value="root"></property>
          <property name="password" value="513721abcd"></property>
        </bean>
         <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
          <property name="dataSource" ref="dataSource"></property>
        </bean>
</beans>

测试代码：

package jdbctemplateioc;

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

public class Test2 {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ApplicationContext context=new ClassPathXmlApplicationContext("jdbctemplateioc2.xml");
		UserService2 userService2= (UserService2) context.getBean("userService2");
		userService2.add();
	}
}

注意：配置文件中的dataSource和JdbcTemplate都是导入的包中自带的
JdbcTemplate需要注入dataSource属性