准备工作
需求&环境搭建
需求：
部门管理：
查询部门列表
删除部门
新增部门
修改部门
员工管理
查询员工列表（分页、条件）
删除员工
新增员工
修改员工
环境搭建
准备数据库表（dept、emp）
-- 部门管理
create table dept(
id int unsigned primary key auto_increment comment '主键ID',
name varchar(10) not null unique comment '部门名称',
create_time datetime not null comment '创建时间',
update_time datetime not null comment '修改时间'
) comment '部门表';
insert into dept (id, name, create_time, update_time) values(1,'学工部',now(),now()),(2,'教研部',now(),now()),(3,'咨询部',now(),now()), (4,'就业部',now(),now()),(5,'人事部',now(),now());
-- 员工管理(带约束)
create table emp (
id int unsigned primary key auto_increment comment 'ID',
username varchar(20) not null unique comment '用户名',
password varchar(32) default '123456' comment '密码',
name varchar(10) not null comment '姓名',
gender tinyint unsigned not null comment '性别, 说明: 1 男, 2 女',
image varchar(300) comment '图像',
job tinyint unsigned comment '职位, 说明: 1 班主任,2 讲师, 3 学工主管, 4 教研主管, 5 咨询师',
entrydate date comment '入职时间',
dept_id int unsigned comment '部门ID',
create_time datetime not null comment '创建时间',
update_time datetime not null comment '修改时间'
) comment '员工表';
INSERT INTO emp
(id, username, password, name, gender, image, job, entrydate,dept_id, create_time, update_time) VALUES
(1,'jinyong','123456','金庸',1,'1.jpg',4,'2000-01-01',2,now(),now()),
(2,'zhangwuji','123456','张无忌',1,'2.jpg',2,'2015-01-01',2,now(),now()),
(3,'yangxiao','123456','杨逍',1,'3.jpg',2,'2008-05-01',2,now(),now()),
(4,'weiyixiao','123456','韦一笑',1,'4.jpg',2,'2007-01-01',2,now(),now()),
(5,'changyuchun','123456','常遇春',1,'5.jpg',2,'2012-12-05',2,now(),now()),
(6,'xiaozhao','123456','小昭',2,'6.jpg',3,'2013-09-05',1,now(),now()),
(7,'jixiaofu','123456','纪晓芙',2,'7.jpg',1,'2005-08-01',1,now(),now()),
(8,'zhouzhiruo','123456','周芷若',2,'8.jpg',1,'2014-11-09',1,now(),now()),
(9,'dingminjun','123456','丁敏君',2,'9.jpg',1,'2011-03-11',1,now(),now()),
(10,'zhaomin','123456','赵敏',2,'10.jpg',1,'2013-09-05',1,now(),now()),
(11,'luzhangke','123456','鹿杖客',1,'11.jpg',5,'2007-02-01',3,now(),now()),
(12,'hebiweng','123456','鹤笔翁',1,'12.jpg',5,'2008-08-18',3,now(),now()),
(13,'fangdongbai','123456','方东白',1,'13.jpg',5,'2012-11-01',3,now(),now()),
(14,'zhangsanfeng','123456','张三丰',1,'14.jpg',2,'2002-08-01',2,now(),now()),
(15,'yulianzhou','123456','俞莲舟',1,'15.jpg',2,'2011-05-01',2,now(),now()),
(16,'songyuanqiao','123456','宋远桥',1,'16.jpg',2,'2007-01-01',2,now(),now()),
(17,'chenyouliang','123456','陈友谅',1,'17.jpg',NULL,'2015-03-21',NULL,now(),now());
创建springboot工程，引入对应的起步依赖（web、mybatis、mysql驱动、lombok）
配置文件application.properties中引入mybatis的配置信息，准备对应的实体类
#?????
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#??????url
spring.datasource.url=jdbc:mysql://localhost:3306/tlias
#?????????
spring.datasource.username=root
#????????
spring.datasource.password=1234
#??mybatis???, ????????
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
#??mybatis??????????? a_column ------> aCloumn
mybatis.configuration.map-underscore-to-camel-case=true
准备对应的Mapper、Service（接口、实现类）、Controller基础结构
开发规范
案例基于当前最主流的前后端分离模式进行开发
Restful
REST，表述性状态转换，它是一种软件架构分格
注意：REST是风格，是约定方式，约定不是规定，可以打破
描述模块的功能通常使用复数，也就是加s的格式来描述，表示此类资源，而非单个资源，如：users、emps、books....
前后端交互统一响应结果Result
package com.itbignyi.tliaswebmanagement.pojp;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Result {
private Integer code;//响应码，1 代表成功; 0 代表失败
private String msg; //响应信息 描述字符串
private Object data; //返回的数据
//增删改 成功响应
public static Result success() {
return new Result(1, "success", null);
}
//查询 成功响应
public static Result success(Object data) {
return new Result(1, "success", data);
}
//失败响应
public static Result error(String msg) {
return new Result(0, msg, null);
}
}
部门管理
查询部门
代码如下
package com.itbignyi.tliaswebmanagement.controller;
import com.itbignyi.tliaswebmanagement.pojp.Dept;
import com.itbignyi.tliaswebmanagement.pojp.Result;
import com.itbignyi.tliaswebmanagement.service.DeptService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@Slf4j
@RestController
public class DeptController {
@Autowired
private DeptService deptService;
@GetMapping("/depts")
public Result list() {
log.info("查询全部部门数据");
List<Dept> deptList = deptService.list();
return Result.success(deptList);
}
}
package com.itbignyi.tliaswebmanagement;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class TliasWebManagementApplication {
public static void main(String[] args) {
SpringApplication.run(TliasWebManagementApplication.class, args);
}
}
package com.itbignyi.tliaswebmanagement.service;
import com.itbignyi.tliaswebmanagement.pojp.Dept;
import java.util.List;
public interface DeptService {
List<Dept> list();
}
package com.itbignyi.tliaswebmanagement.service.impl;
import com.itbignyi.tliaswebmanagement.mapper.DeptMapper;
import com.itbignyi.tliaswebmanagement.pojp.Dept;
import com.itbignyi.tliaswebmanagement.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class DeptServiceImpl implements DeptService {
@Autowired
private DeptMapper deptMapper;
@Override
public List<Dept> list() {
return deptMapper.list();
}
}
package com.itbignyi.tliaswebmanagement.mapper;
import com.itbignyi.tliaswebmanagement.pojp.Dept;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface DeptMapper {
@Select("select *from tlias.dept")
List<Dept> list();
}
运行代码：
前后端联调
删除部门
代码如下：
@DeleteMapping("/depts/{id}")
public Result delete(@PathVariable Integer id) {
log.info("根据id删除部门：{}", id);
deptService.delete(id);
return Result.success();
} void delete(Integer id);
@Override
public void delete(Integer id) {
deptMapper.deleteById(id);
}@Delete("delete from tlias.dept where id=#{id}")
void deleteById(Integer id);运行如下：
新增部门
@GetMapping("/depts/{id}")
public Result selectById(@PathVariable Integer id){
log.info("获取id为"+id+"的数据");
Dept dept = deptService.selectById(id);
return Result.success(dept);
}
/*
* 修改部门
* */
@PutMapping("/depts")
public Result update(@RequestBody Dept dept){
log.info("修改部门"+dept);
deptService.update(dept);
return Result.success();
} @Select("select * from tlias.dept where id=#{id};")
Dept selectById(Integer id);
@Update("update tlias.dept set name = #{name}, update_time = #{updateTime} where id = #{id}")
void update(Dept dept);
Dept selectById(Integer id);
void update(Dept dept); @Override
public Dept selectById(Integer id){
Dept dept = deptMapper.selectById(id);
return dept;
}
@Override
public void update(Dept dept){
dept.setUpdateTime(LocalDateTime.now());
deptMapper.update(dept);
}
