1、先导入mybatis依赖(如果之前钩记了就不用导了)
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
2、在application.yml加入mybatis配置
mybatis:
mapper-locations: classpath:mapping文件包名/*.xml
type-aliases-package: 实体类包的全路径名
3、数据库建表
CREATE TABLE tb_user(
USER_ID INT PRIMARY KEY auto_increment, # 用户id
USER_NAME VARCHAR(20) #用户姓名
);
4、创建实体类(User)
package club.djkplay.springboot2.pojo;
public class User {
private Integer user_Id;
private String user_Name;
public User() {
}
public User(Integer user_Id) {
this.user_Id = user_Id;
}
public User(Integer user_Id, String user_Name) {
this.user_Id = user_Id;
this.user_Name = user_Name;
}
public Integer getUser_Id() {
return user_Id;
}
public void setUser_Id(Integer user_Id) {
this.user_Id = user_Id;
}
public String getUser_Name() {
return user_Name;
}
public void setUser_Name(String user_Name) {
this.user_Name = user_Name;
}
@Override
public String toString() {
return "User{" +
"user_Id=" + user_Id +
", user_Name='" + user_Name + '\'' +
'}';
}
}
5、创建mapping文件（UserMapper.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="club.djkplay.springboot2.dao.UserMapper">
<resultMap id="BaseResultMap" type="club.djkplay.springboot2.pojo.User">
<id column="USER_ID" jdbcType="INTEGER" property="userId" />
<result column="USER_NAME" jdbcType="VARCHAR" property="userName" />
</resultMap>
<sql id="Base_Column_List">
USER_ID, USER_NAME
</sql>
<select id="selectAllUser" resultType="user">
select * from tb_user
</select>
</mapper>
6、创建接口(UserMapper)
package club.djkplay.springboot2.dao;
import club.djkplay.springboot2.pojo.User;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository("userMapper")
public interface UserMapper {
List<User> selectAllUser();
}
7、创建controller控制器测试(TestController)
package club.djkplay.springboot2.controller;
import club.djkplay.springboot2.dao.UserMapper;
import club.djkplay.springboot2.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.annotation.Resource;
import java.util.List;
@Controller
public class TestController {
@Resource
private UserMapper userMapper;
@RequestMapping("select")
public ModelAndView adduser(){
ModelAndView mv = new ModelAndView();
List<User> list = userMapper.selectAllUser();
mv.addObject("list",list);
mv.setViewName("success");
return mv;
}
}
8、创建ftl静态测试页面(Test.ftl)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试</title>
</head>
<body>
<form action="add" method="post">
<input type="submit" value="提交">
</form><br/>
</body>
</html>
9、测试成功跳转的页面(Success.ftl)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试</title>
</head>
<body>
<#list list as i>
${i}
</#list>
</body>
</html>
10、测试成功
