案例-04.部门管理-删除

一.功能演示

二.需求说明

三.接口文档

四.思路

既然是通过id删除对应的部门，那么必然要获取到前端请求的要删除部门的id。id作为请求路径传递过来，那么要从请求路径中获取，id是一个路径参数。因此使用注解@PathVariable获取路径参数。

请求方式为delete，因此使用注解@DeleteMapping。

五.controller层

package com.gjw.controller;/*** 部门管理Controller*/import com.gjw.anno.Log;
import com.gjw.pojo.Dept;
import com.gjw.pojo.Result;
import com.gjw.service.DeptService;
import com.gjw.service.impl.DeptServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import java.util.List;@Slf4j // 记录日志使用
@RestController
@RequestMapping("/depts")
public class DeptController {@Autowiredprivate DeptService deptService;//    @RequestMapping(value = "/depts",method = RequestMethod.GET)   指定请求方式为GET@GetMapping()   // 指定请求方式为GETpublic Result list(){log.info("查询全部部门数据");// 调用service层查询全部部门数据List<Dept> deptList = deptService.list();return Result.success(deptList);}@Log@DeleteMapping("{id}")  // 指定请求方式为DELETEpublic Result delete(@PathVariable Integer id) throws Exception {log.info("根据id删除部门：{}",id);// 调用service删除部门deptService.deleteById(id);return Result.success();}
}

六.service层

service接口

package com.gjw.service;import com.gjw.pojo.Dept;import java.util.List;public interface DeptService {List<Dept> list();void deleteById(Integer id) throws Exception;
}

package com.gjw.service.impl;import com.gjw.mapper.DeptLogMapper;
import com.gjw.mapper.DeptMapper;
import com.gjw.mapper.EmpMapper;
import com.gjw.pojo.Dept;
import com.gjw.pojo.DeptLog;
import com.gjw.service.DeptLogService;
import com.gjw.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;import java.time.LocalDateTime;
import java.util.List;@Service
public class DeptServiceImpl implements DeptService {@Autowiredprivate DeptMapper deptMapper;@Overridepublic List<Dept> list() {return deptMapper.list();}@Overridepublic void deleteById(Integer id) {deleteMapper.deleteById(id);}}

七.Mapper层

package com.gjw.mapper;import com.gjw.anno.Log;
import com.gjw.pojo.Dept;
import org.apache.ibatis.annotations.*;import java.util.List;/*** 部门管理*/
@Mapper
public interface DeptMapper {/*** 查询全部部门数据* @return*/@Select("select * from dept")List<Dept> list();/*** 根据id删除部门数据* @param id*/@Delete("delete from dept where id = #{id}")void deleteById(Integer id);}