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="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.Driverjdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=rootjdbc.password=rootapplicationContext.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;
}
}