1.db.properties数据库配置
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mybatis
jdbc.username=root
jdbc.password=root
2.applicationContext.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" 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/jee http://www.springframework.org/schema/jee/spring-jee.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 1.导入数据库配置文件 --> <context:property-placeholder location="classpath:db.properties"/> <!-- 2.开启@Autowired注解 --> <context:annotation-config/> <!-- 3.扫描Spring Bean组件 --> <context:component-scan base-package="com.gzcgxt.erp"/> <!-- 4.jdbcTemplate数据库操作组件 --> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <constructor-arg ref="dataSource"/> </bean> <!-- 5.Druid数据源配置 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <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> </beans>
3.User对象
package com.gzcgxt.erp.domain; import lombok.Data; @Data public class User { private Integer id; private String name; private Integer age; private Integer flag; }
4.UserDAO
package com.gzcgxt.erp.dao; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import javax.sql.DataSource; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.stereotype.Repository; import com.gzcgxt.erp.domain.User; @Repository public class UserDAO { @Autowired private JdbcTemplate jdbcTemplate; public void save() { jdbcTemplate.update("INSERT INTO `user` SET name='dddd',age=12,flag=1"); } public void delete() { List<User> list = jdbcTemplate.query("select * from user order by id asc limit 10", new RowMapper<User>() { @Override public User mapRow(ResultSet rs, int rowNum) throws SQLException { User u = new User(); u.setId(rs.getInt("id")); u.setName(rs.getString("name")); u.setAge(rs.getInt("age")); u.setFlag(rs.getInt("flag")); return u; } }); User u=list.size()>1 ? list.get(0) : null; String cmdText="DELETE FROM `user` WHERE id="+u.getId(); jdbcTemplate.execute(cmdText); System.out.println(u+"删除成功"); } }
6.测试代码
package com.gzcgxt.erp; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.gzcgxt.erp.dao.UserDAO; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml") public class App { @Autowired private UserDAO dao; @Test public void testApp() throws Exception { dao.delete(); } }