JavaWeb - Day10 - 案例 - 部门管理、员工管理

-- 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';
-- 部门表测试数据
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';
-- 员工表测试数据
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());

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> 
    </parent>
    <groupId>com.itheima</groupId>
    <artifactId>tlias-web-management</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>tlias-web-management</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.3.0</version>
        </dependency>

        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

#数据库连接
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/tlias
spring.datasource.username=root
spring.datasource.password=1234

#开启mybatis的日志输出
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

#开启数据库表字段 到 实体类属性的驼峰映射
mybatis.configuration.map-underscore-to-camel-case=true

/*部门类*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Dept {
    private Integer id;
    private String name;
    private LocalDateTime createTime;
    private LocalDateTime updateTime;
}

/*员工类*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Emp {
    private Integer id;
    private String username;
    private String password;
    private String name;
    private Short gender;
    private String image;
    private Short job;
    private LocalDate entrydate;
    private Integer deptId;
    private LocalDateTime createTime;
    private LocalDateTime updateTime;
}

package com.itheima.mapper;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface DeptMapper {
}

package com.itheima.mapper;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface EmpMapper {
}

package com.itheima.service;

//部门业务规则
public interface DeptService {
}

package com.itheima.service.impl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

//部门业务实现类
@Slf4j
@Service
public class DeptServiceImpl implements DeptService {
}

package com.itheima.service;

//员工业务规则
public interface EmpService {
}

package com.itheima.service.impl;
import com.itheima.service.EmpService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

//员工业务实现类
@Slf4j
@Service
public class EmpServiceImpl implements EmpService {

}

package com.itheima.controller;
import org.springframework.web.bind.annotation.RestController;

//部门管理控制器
@RestController
public class DeptController {
}

package com.itheima.controller;
import org.springframework.web.bind.annotation.RestController;

//员工管理控制器
@RestController
public class EmpController {
}

http://localhost:8080/user/getById?id=1     GET：查询id为1的用户
http://localhost:8080/user/saveUser         POST：新增用户
http://localhost:8080/user/updateUser       POST：修改用户
http://localhost:8080/user/deleteUser?id=1  GET：删除id为1的用户

http://localhost:8080/users/1  GET：查询id为1的用户
http://localhost:8080/users    POST：新增用户
http://localhost:8080/users    PUT：修改用户
http://localhost:8080/users/1  DELETE：删除id为1的用户

package com.itheima.pojo;

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);
    }
}

请求路径：/depts

请求方式：GET

接口描述：该接口用于部门列表数据查询

{
  "code": 1,
  "msg": "success",
  "data": [
    {
      "id": 1,
      "name": "学工部",
      "createTime": "2022-09-01T23:06:29",
      "updateTime": "2022-09-01T23:06:29"
    },
    {
      "id": 2,
      "name": "教研部",
      "createTime": "2022-09-01T23:06:29",
      "updateTime": "2022-09-01T23:06:29"
    }
  ]
}

@Slf4j
@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;

    //@RequestMapping(value = "/depts" , method = RequestMethod.GET)
    @GetMapping("/depts")
    public Result list(){
        log.info("查询所有部门数据");
        List<Dept> deptList = deptService.list();
        return Result.success(deptList);
    }
}

public interface DeptService {
    /**
     * 查询所有的部门数据
     * @return   存储Dept对象的集合
     */
    List<Dept> list();
}

@Slf4j
@Service
public class DeptServiceImpl implements DeptService {
    @Autowired
    private DeptMapper deptMapper;
    
    @Override
    public List<Dept> list() {
        List<Dept> deptList = deptMapper.list();
        return deptList;
    }
}    

@Mapper
public interface DeptMapper {
    //查询所有部门数据
    @Select("select id, name, create_time, update_time from dept")
    List<Dept> list();
}

请求路径：/depts/{id}

请求方式：DELETE

接口描述：该接口用于根据ID删除部门数据

/depts/1

{
    "code":1,
    "msg":"success",
    "data":null
}

@PathVariable

@DeleteMapping

@Slf4j
@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;

    @DeleteMapping("/depts/{id}")
    public Result delete(@PathVariable Integer id) {
        //日志记录
        log.info("根据id删除部门");
        //调用service层功能
        deptService.delete(id);
        //响应
        return Result.success();
    }
    
    //省略...
}

public interface DeptService {

    /**
     * 根据id删除部门
     * @param id    部门id
     */
    void delete(Integer id);

    //省略...
}

@Slf4j
@Service
public class DeptServiceImpl implements DeptService {
    @Autowired
    private DeptMapper deptMapper;

    @Override
    public void delete(Integer id) {
        //调用持久层删除功能
        deptMapper.deleteById(id);
    }
    
    //省略...
}

@Mapper
public interface DeptMapper {
    /**
     * 根据id删除部门信息
     * @param id   部门id
     */
    @Delete("delete from dept where id = #{id}")
    void deleteById(Integer id);
   
    //省略...
}

请求路径：/depts

请求方式：POST

接口描述：该接口用于添加部门数据

{
    "name": "教研部"
}

{
    "code":1,
    "msg":"success",
    "data":null
}

@PostMapping

@RequestBody  //把前端传递的json数据填充到实体类中

@Slf4j
@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;

    @PostMapping("/depts")
    public Result add(@RequestBody Dept dept){
        //记录日志
        log.info("新增部门：{}",dept);
        //调用service层添加功能
        deptService.add(dept);
        //响应
        return Result.success();
    }

    //省略...
}

public interface DeptService {

    /**
     * 新增部门
     * @param dept  部门对象
     */
    void add(Dept dept);

    //省略...
}

@Slf4j
@Service
public class DeptServiceImpl implements DeptService {
    @Autowired
    private DeptMapper deptMapper;

    @Override
    public void add(Dept dept) {
        //补全部门数据
        dept.setCreateTime(LocalDateTime.now());
        dept.setUpdateTime(LocalDateTime.now());
        //调用持久层增加功能
        deptMapper.inser(dept);
    }

    //省略...
}

@Mapper
public interface DeptMapper {

    @Insert("insert into dept (name, create_time, update_time) values (#{name},#{createTime},#{updateTime})")
    void inser(Dept dept);

    //省略...
}

    /*
     * 根据ID查询
     * */
    @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);
    }

    /*
     * 根据ID查询数据
     * */
    Dept selectById(Integer id);

    @Override
    public Dept selectById(Integer id){
        Dept dept = deptMapper.selectById(id);
        return dept;
    }

    @Select("select * from dept where id = #{id}")
    Dept selectById(Integer id);

    /*
    * 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();
    }

    /*
    * 修改部门
    * */
    void update(Dept dept);

    @Override
    public void update(Dept dept){
        dept.setUpdateTime(LocalDateTime.now());
        deptMapper.update(dept);
    }

    @Update("update dept set name = #{name}, update_time = #{updateTime} where id = #{id}")
    void update(Dept dept);

select * from emp  limit 0,10;

select * from emp  limit 10,10;

select * from emp  limit 20,10;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class PageBean {
private Long total; //总记录数
private List rows; //当前页数据列表
}

请求路径：/emps

请求方式：GET

接口描述：该接口用于员工列表数据的条件分页查询

/emps?name=张&gender=1&begin=2007-09-01&end=2022-09-01&page=1&pageSize=10

{
  "code": 1,
  "msg": "success",
  "data": {
    "total": 2,
    "rows": [
       {
        "id": 1,
        "username": "jinyong",
        "password": "123456",
        "name": "金庸",
        "gender": 1,
        "image": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-02-00-27-53B.jpg",
        "job": 2,
        "entrydate": "2015-01-01",
        "deptId": 2,
        "createTime": "2022-09-01T23:06:30",
        "updateTime": "2022-09-02T00:29:04"
      },
      {
        "id": 2,
        "username": "zhangwuji",
        "password": "123456",
        "name": "张无忌",
        "gender": 1,
        "image": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-02-00-27-53B.jpg",
        "job": 2,
        "entrydate": "2015-01-01",
        "deptId": 2,
        "createTime": "2022-09-01T23:06:30",
        "updateTime": "2022-09-02T00:29:04"
      }
    ]
  }
}

import com.itheima.pojo.PageBean;
import com.itheima.pojo.Result;
import com.itheima.service.EmpService;
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.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //条件分页查询
    @GetMapping
    public Result page(@RequestParam(defaultValue = "1") Integer page,
                       @RequestParam(defaultValue = "10") Integer pageSize) {
        //记录日志
        log.info("分页查询，参数：{},{}", page, pageSize);
        //调用业务层分页查询功能
        PageBean pageBean = empService.page(page, pageSize);
        //响应
        return Result.success(pageBean);
    }
}

public interface EmpService {
    /**
     * 条件分页查询
     * @param page 页码
     * @param pageSize 每页展示记录数
     * @return
     */
    PageBean page(Integer page, Integer pageSize);
}

import com.itheima.mapper.EmpMapper;
import com.itheima.pojo.Emp;
import com.itheima.pojo.PageBean;
import com.itheima.service.EmpService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDate;
import java.util.List;

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public PageBean page(Integer page, Integer pageSize) {
        //1、获取总记录数
        Long count = empMapper.count();

        //2、获取分页查询结果列表
        Integer start = (page - 1) * pageSize; //计算起始索引 , 公式: (页码-1)*页大小
        List<Emp> empList = empMapper.list(start, pageSize);

        //3、封装PageBean对象
        PageBean pageBean = new PageBean(count , empList);
        return pageBean;
    }
}

@Mapper
public interface EmpMapper {
    //获取总记录数
    @Select("select count(*) from emp")
    public Long count();

    //获取当前页的结果列表
    @Select("select * from emp limit #{start}, #{pageSize}")
    public List<Emp> list(Integer start, Integer pageSize);
}

<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.4.2</version>
</dependency>

@Mapper
public interface EmpMapper {
    //获取当前页的结果列表
    @Select("select * from emp")
    public List<Emp> page(Integer start, Integer pageSize);
}

@Override
public PageBean page(Integer page, Integer pageSize) {
    // 设置分页参数
    PageHelper.startPage(page, pageSize); 
    // 执行分页查询
    List<Emp> empList = empMapper.list(); 
    // 获取分页结果
    Page<Emp> p = (Page<Emp>) empList;   
    //封装PageBean
    PageBean pageBean = new PageBean(p.getTotal(), p.getResult()); 
    return pageBean;
}

select * 
from emp
where 
  name like concat('%','张','%')   -- 条件1：根据姓名模糊匹配
  and gender = 1                   -- 条件2：根据性别精确匹配
  and entrydate = between '2000-01-01' and '2010-01-01'  -- 条件3：根据入职日期范围匹配
order by update_time desc;

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //条件分页查询
    @GetMapping
    public Result page(@RequestParam(defaultValue = "1") Integer page,
                       @RequestParam(defaultValue = "10") Integer pageSize,
                       String name, Short gender,
                       @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate begin,
                       @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end) {
        //记录日志
        log.info("分页查询，参数：{},{},{},{},{},{}", page, pageSize,name, gender, begin, end);
        //调用业务层分页查询功能
        PageBean pageBean = empService.page(page, pageSize, name, gender, begin, end);
        //响应
        return Result.success(pageBean);
    }
}

public interface EmpService {
    /**
     * 条件分页查询
     * @param page     页码
     * @param pageSize 每页展示记录数
     * @param name     姓名
     * @param gender   性别
     * @param begin   开始时间
     * @param end     结束时间
     * @return
     */
    PageBean page(Integer page, Integer pageSize, String name, Short gender, LocalDate begin, LocalDate end);
}

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public PageBean page(Integer page, Integer pageSize, String name, Short gender, LocalDate begin, LocalDate end) {
        //设置分页参数
        PageHelper.startPage(page, pageSize);
        //执行条件分页查询
        List<Emp> empList = empMapper.list(name, gender, begin, end);
        //获取查询结果
        Page<Emp> p = (Page<Emp>) empList;
        //封装PageBean
        PageBean pageBean = new PageBean(p.getTotal(), p.getResult());
        return pageBean;
    }
}

@Mapper
public interface EmpMapper {
    //获取当前页的结果列表
    public List<Emp> list(String name, Short gender, LocalDate begin, LocalDate end);
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.mapper.EmpMapper">

    <!-- 条件分页查询 -->
    <select id="list" resultType="com.itheima.pojo.Emp">
        select * from emp
        <where>
            <if test="name != null and name != ''">
                name like concat('%',#{name},'%')
            </if>
            <if test="gender != null">
                and gender = #{gender}
            </if>
            <if test="begin != null and end != null">
                and entrydate between #{begin} and #{end}
            </if>
        </where>
        order by update_time desc
    </select>
</mapper>

请求路径：/emps/{ids}

请求方式：DELETE

接口描述：该接口用于批量删除员工的数据信息

/emps/1,2,3

{
    "code":1,
    "msg":"success",
    "data":null
}

@PathVariable

@DeleteMapping

Mybatis中的动态SQL：foreach

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //批量删除
    @DeleteMapping("/{ids}")
    public Result delete(@PathVariable List<Integer> ids){
        empService.delete(ids);
        return Result.success();
    }

    //条件分页查询
    @GetMapping
    public Result page(@RequestParam(defaultValue = "1") Integer page,
                       @RequestParam(defaultValue = "10") Integer pageSize,
                       String name, Short gender,
                       @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate begin,
                       @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate end) {
        //记录日志
        log.info("分页查询，参数：{},{},{},{},{},{}", page, pageSize,name, gender, begin, end);
        //调用业务层分页查询功能
        PageBean pageBean = empService.page(page, pageSize, name, gender, begin, end);
        //响应
        return Result.success(pageBean);
    }
}

public interface EmpService {

    /**
     * 批量删除操作
     * @param ids id集合
     */
    void delete(List<Integer> ids);

    //省略...
}

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public void delete(List<Integer> ids) {
        empMapper.delete(ids);
    }

    //省略...
}

@Mapper
public interface EmpMapper {
    //批量删除
    void delete(List<Integer> ids);

    //省略...
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.mapper.EmpMapper">

    <!--批量删除员工-->
    <select id="delete">
        delete from emp where id in
        <foreach collection="ids" item="id" open="(" close=")" separator=",">
            #{id}
        </foreach>
    </select>

    <!-- 省略... -->

</mapper>