springboot注解加深

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import util.IdWorker;
//这里是一个启动类
@SpringBootApplication
public class BaseApplication {
    public static void main(String[]args){
        SpringApplication.run(BaseApplication.class, args);
    }

    @Bean
    public IdWorker idWorker(){
        return new IdWorker();
    }
}

package com.tensquare.base.controller;

import com.tensquare.base.pojo.Label;
import com.tensquare.base.service.LabelSerivce;
import entity.Result;
import entity.StatusCode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@CrossOrigin
@RequestMapping("/label")
public class LabelController {
    @Autowired
    private LabelSerivce labelSerivce;
    @RequestMapping(method = RequestMethod.GET)
    public Result findAll(){
        return new Result(true, StatusCode.OK,"查询成功",labelSerivce.findAll());
    }
    @RequestMapping(value = "/{labelId}",method = RequestMethod.GET)
    public  Result findById(@PathVariable("labelId")String id){
        return new Result(true, StatusCode.OK,"查询成功",labelSerivce.findById(id));
    }
    @RequestMapping(method = RequestMethod.POST)
    public Result save(@RequestBody Label label){
        labelSerivce.save(label);
        return new Result(true, StatusCode.OK,"添加成功");
    }
    @RequestMapping(value = "/{labelId}",method = RequestMethod.PUT)
    public Result update(@RequestBody Label label,@PathVariable("labelId") String id){
        label.setId(id);
        labelSerivce.update(label);
        return new Result(true, StatusCode.OK,"更新成功");
    }
    @RequestMapping(value = "/{labelId}",method = RequestMethod.DELETE)
    public Result delete(@PathVariable("labelId") String id){
        labelSerivce.deleteById(id);
        return new Result(true, StatusCode.OK,"删除成功");
    }

}

package com.tensquare.base.service;

import com.tensquare.base.dao.LabelDao;
import com.tensquare.base.pojo.Label;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import util.IdWorker;
import java.util.List;

@Service
@Transactional
public class LabelSerivce {
    @Autowired
    private LabelDao labelDao;
    @Autowired
    private IdWorker idWorker;
    public List<Label> findAll(){
        return labelDao.findAll();
    }
    public Label findById(String id){
        return labelDao.findById(id).get();
    }
    public void save (Label label){
        label.setId(idWorker.nextId()+"");
        labelDao.save(label);
    }
    public void update (Label label){
        labelDao.save(label);
    }
    public void deleteById(String  id){
        labelDao.deleteById(id);
    }
}

package com.tensquare.base.dao;

import com.tensquare.base.pojo.Label;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

/**
 * <Lable,String> 第一个参数是lable实体，第二个参数是id 更新删除查找要用到
 * 这里继承的JpaSpecificationExecutor用来分页等复杂操作
 */
public interface LabelDao extends JpaRepository <Label,String>,JpaSpecificationExecutor<Label>{
}

server:
  port: 9001
spring:
  application:
    name: tensquare-base
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://xxx.xxx.xxx.xxx:3306/tensquare_base?characterEncoding=utf-8&useSSL=false
    password: root
    username: root

  jpa:
    database: mysql
    show-sql: true