添加Mybatis的起步依赖
<!--mybatis起步依赖--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency>
添加数据库驱动坐标
<!-- MySQL连接驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency>
添加数据库连接信息
在application.properties中添加数据量的连接信息
#DB Configuration: spring.datasource.driverClassName=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8 spring.datasource.username=root spring.datasource.password=root
创建user表
在test数据库中创建user表
-- ---------------------------- -- Table structure for `user` -- ---------------------------- DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` int(11) NOT NULL AUTO_INCREMENT, `username` varchar(50) DEFAULT NULL, `password` varchar(50) DEFAULT NULL, `name` varchar(50) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of user -- ---------------------------- INSERT INTO `user` VALUES ('1', 'zhangsan', '123', '张三'); INSERT INTO `user` VALUES ('2', 'lisi', '123', '李四');
创建实体Bean
public class User { // 主键 private Long id; // 用户名 private String username; // 密码 private String password; // 姓名 private String name; //此处省略getter和setter方法 .. .. }
编写Mapper
@Mapper public interface UserMapper { public List<User> queryUserList(); }
注意：@Mapper标记该类是一个mybatis的mapper接口，可以被spring boot自动扫描到spring上下文中
配置Mapper映射文件
在src\main\resources\mapper路径下加入UserMapper.xml配置文件"
<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="com.itheima.mapper.UserMapper"> <select id="queryUserList" resultType="user"> select * from user </select> </mapper>
在application.properties中添加mybatis的信息
#spring集成Mybatis环境 #pojo别名扫描包 mybatis.type-aliases-package=com.itheima.domain #加载Mybatis映射文件 mybatis.mapper-locations=classpath:mapper/*Mapper.xml
编写测试Controller
@Controller public class MapperController { @Autowired private UserMapper userMapper; @RequestMapping("/queryUser") @ResponseBody public List<User> queryUser(){ List<User> users = userMapper.queryUserList(); return users; } }
测试
