ssmp

pojo：

package com.example.domain;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@AllArgsConstructor
@NoArgsConstructor
@Data
public class Book {
    private Integer id;
    private String type;
    private String name;
    private String description;
}
dao：

package com.example.dao;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.domain.Book;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
@Mapper
@Repository
public interface BookDao extends BaseMapper<Book>{
}
service：

package com.example.service;

import com.example.domain.Book;
import org.springframework.stereotype.Service;

import java.util.List;
public interface BookService {
    Boolean save(Book book);
    Boolean update(Book book);
    Boolean delete(Integer id);
    Book getId(Integer id);
    List<Book> getAll();
}

package com.example.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.domain.Book;
import org.springframework.stereotype.Service;

public interface IBookService extends IService<Book> {
    Boolean save1(Book book);
}

package com.example.service.impl;

import com.example.dao.BookDao;
import com.example.domain.Book;
import com.example.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;
@Service
public class BookServiceImpl2 implements BookService {
    @Resource
    private BookDao bookDao;
    @Override
    public Boolean save(Book book) {
        return bookDao.insert(book)>0;
    }

    @Override
    public Boolean update(Book book) {
        return bookDao.updateById(book)>0;
    }

    @Override
    public Boolean delete(Integer id) {
        return bookDao.deleteById(id)>0;
    }

    @Override
    public Book getId(Integer id) {
        return bookDao.selectById(id);
    }

    @Override
    public List<Book> getAll() {
        return bookDao.selectList(null);
    }
}

package com.example.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.dao.BookDao;
import com.example.domain.Book;
import com.example.service.IBookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class BookServiceImpl extends ServiceImpl<BookDao, Book> implements IBookService {
    @Resource
    private BookDao bookDao;
    @Override
    public Boolean save1(Book book) {
        return bookDao.insert(book)>0;
    }
}

controller：

package com.example.controlle;

import com.example.dao.BookDao;
import com.example.domain.Book;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;

@RestController
@RequestMapping("/books")
public class BookController {
    @Resource
    private BookDao bookDao;
    @GetMapping
    public List<Book> getAll(){
        return bookDao.selectList(null);
    }
//    @PostMapping
//    public Boolean sava(@RequestBody Book book){
//        return bookDao.insert(book)>0;
//    }
    @PutMapping
    public Boolean update(@RequestBody Book book){
        return bookDao.updateById(book)>0;
    }
    @DeleteMapping("{id}")
    public Boolean delete(@PathVariable Integer id){
        return bookDao.deleteById(id)>0;
    }
    @GetMapping("{id}")
    public Book getById(@PathVariable Integer id){
        return bookDao.selectById(id);
    }
}

server:
  port: 8080
spring:
  datasource:
    druid:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/mybatis
      username: root
      password: root
mybatis-plus:
  global-config:
    db-config:
      table-prefix: tbl_
      id-type: auto
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

package com.example.controlle.utils;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.xml.ws.soap.Addressing;

@NoArgsConstructor
@AllArgsConstructor
@Data
public class R {
    private Boolean flag;
    private Object data;
    public R(Boolean flag){
        this.flag=flag;
    }
}

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