SpringBoot整合Mybatis
1 添加Mybatis的起步依赖
            
            
              XML
              
              
            
          
          <!--mybatis起步依赖-->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.1.1</version>
</dependency>2 添加数据库驱动坐标
            
            
              XML
              
              
            
          
          <!-- MySQL连接驱动 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>3 添加数据库连接信息
在application.properties中添加数据量的连接信息
            
            
              java
              
              
            
          
          #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=root4 创建user表
在test数据库中创建user表
            
            
              sql
              
              
            
          
          -- ----------------------------
-- 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');5 创建实体Bean
            
            
              java
              
              
            
          
          public class User {
    // 主键
    private Long id;
    // 用户名
    private String username;
    // 密码
    private String password;
    // 姓名
    private String name;
  
    
}6 编写Mapper
            
            
              java
              
              
            
          
          @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
7 配置Mapper映射文件
在src\main\resources\mapper路径下加入UserMapper.xml配置文件"
            
            
              XML
              
              
            
          
          <?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>8 在application.properties中添加mybatis的信息
            
            
              XML
              
              
            
          
          #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.xml9 编写测试Controller
            
            
              java
              
              
            
          
          @Controller
public class MapperController {
    @Autowired
    private UserMapper userMapper;
    @RequestMapping("/queryUser")
    @ResponseBody
    public List<User> queryUser(){
        List<User> users = userMapper.queryUserList();
        return users;
    }
}