Spring简单与数据库连接

1、导入需要的jar包

2、配置数据源，在applicationContext.xml文件中增加配置

方式1：直接使用bean方式

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<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">     <property name="driverClassName" value="com.mysql.jdbc.Driver"/>     <property name="url" value="jdbc:mysql://localhost:3306/test"/>     <property name="username" value="root"/>     <property name="password" value="root"/> </bean>

方式2：使用properties文件

在src下新建jdbc.properties文件，内容如下：

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jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/test jdbc.username=root jdbc.password=root

applicationContext.xml

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<bean     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">     <property name="locations" value="classpath:jdbc.properties" /> </bean> <bean id="dataSource" destroy-method="close"     class="org.apache.commons.dbcp.BasicDataSource">     <property name="driverClassName" value="${jdbc.driverClassName}" />     <property name="url" value="${jdbc.url}" />     <property name="username" value="${jdbc.username}" />     <property name="password" value="${jdbc.password}" /> </bean>

3、测试连接数据库

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package com.fz.annotation.dao.impl;   import java.sql.Connection; import java.sql.SQLException;   import javax.annotation.Resource; import javax.sql.DataSource;   import org.springframework.stereotype.Repository;   import com.fz.annotation.dao.UserDao; import com.fz.xml.entity.User;   @Repository("userDao") public class UserDaoImpl implements UserDao{     private DataSource dataSource;     public void userAdd(User user) {         Connection conn = null;         try {             conn = dataSource.getConnection();             conn.createStatement().executeUpdate("insert into user values(null,'张三')");         } catch (Exception e) {             e.printStackTrace();         }finally{             try {                 conn.close();             } catch (SQLException e) {                 e.printStackTrace();             }         }     }           public DataSource getDataSource() {         return dataSource;     }     @Resource     public void setDataSource(DataSource dataSource) {         this.dataSource = dataSource;     }   }

来自为知笔记(Wiz)