springboot mybatis层整合

dependency>
groupId>org.mybatis.spring.bootgroupId>
artifactId>mybatis-spring-boot-starterartifactId>
version>2.1.1version>
dependency>

spring.datasource.username=
spring.datasource.password=
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

#mybatis 整合 重点
mybatis.type-aliases-package=com.company.pojo
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

package com.company.pojo;

public class User {

    private int id;
    private String name;
    private String pwd;

    public User() {
    }

    public User(int id, String name, String pwd) {
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    @Override
    public String toString() {
        return "Users{" +
                "id=" + id +
                ", name=‘" + name + ‘\‘‘ +
                ", pwd=‘" + pwd + ‘\‘‘ +
                ‘}‘;
    }
}

package com.company.mapper;

import com.company.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import java.util.List;

@Mapper
@Repository
public interface UserMapper {

    List queryAll();

    User queeryUserById(@Param("id") int id);

    int deleteById(@Param("id") int id);

    int insert(User users);

    int update(User users);
}

xml version="1.0" encoding="UTF-8" ?>
DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

mapper namespace="com.company.mapper.UserMapper">

    select id="queryAll" resultType="User">
        select * from user
    select>


mapper>

package com.company.controller;

import com.company.mapper.UserMapper;
import com.company.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class UserController {

    @Autowired
    UserMapper userMapper;

    @RequestMapping("/user")
    public List userAll(){
        List users = userMapper.queryAll();

        for (User user : users) {
            System.out.println(user);
        }
        return users;
    }
    //测试项目是否能正常启动
    @RequestMapping("/userl")
    public String user(){
        return "jjjjj";
    }
}