<!---mybatis通用类包含mybatis和连接池  mybatis和连接池就不需要引入-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.1.2</version>
        </dependency>

package cn.itcast.mapper;

import cn.itcast.pojo.User;
import tk.mybatis.mapper.common.Mapper;

public interface UserMapper extends Mapper<User> {
}

package cn.itcast.pojo;

import lombok.Data;
import tk.mybatis.mapper.annotation.KeySql;

import javax.persistence.Id;
import javax.persistence.Table;
import java.util.Date;

@Data
@Table(name = "user")
public class User {
    @Id  //id
    @KeySql(useGeneratedKeys = true) //主键自增
    private Integer id;

    private String mobile;

    private String nickName;

    private String password;

    private String salt;

    private String head;

    private Date registerDate;

    private Date lastLoginDate;

    private Integer loginCount;
}

server:
  port: 8887
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8&serverTimezone=UTC
    username: root
    password:
mybatis:
  #configuration:
    #map-underscore-to-camel-case: true
  mapper-locations: mapper/*.xml
  type-aliases-package: cn.itcast.pojo

package cn.itcast;

import cn.itcast.interceptor.MyInterceptor;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import tk.mybatis.spring.annotation.MapperScan;

@SpringBootApplication
@MapperScan("cn.itcast.mapper")
public class BootDemoApplication implements WebMvcConfigurer {
    //psvm 快速创建main
    public static void main(String[] args) {
        SpringApplication.run(BootDemoApplication.class,args);
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
    }
}

package cn.itcast.service;

import cn.itcast.pojo.User;


public interface UserService {
    public User queryById(Long id);

    public Integer insertUser(User user);
}

package cn.itcast.service;

import cn.itcast.mapper.UserMapper;
import cn.itcast.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    public User queryById(Long id){
        return userMapper.selectByPrimaryKey(id);
    }

    @Transactional
    public Integer insertUser(User user){
        return userMapper.insert(user);
    }
}

package cn.itcast.web;

import cn.itcast.pojo.User;
import cn.itcast.service.UserService;
import cn.itcast.service.UserServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.sql.DataSource;

@Slf4j
@RestController
@RequestMapping("user")
public class HelloController {
    @Autowired
    private  UserService userService;

    /*@Autowired
    private DataSource dataSource;
    */
    @GetMapping("index")
    public User Hello(@RequestParam("id") Long id){
        return userService.queryById(id);
    }
}