JavaWeb-day10-SpringBootWeb案例

案例-准备工作

需求说明

环境搭建

开发规范-Restful

开发流程

案例-部门管理

查询部门

前后端联调

小结

删除部门

添加部门

@RequestMapping

代码实现

controller包

$DeptController$

java 复制代码

package com.itheima.controller;

import com.itheima.pojo.Dept;
import com.itheima.pojo.Result;
import com.itheima.service.DeptService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * 部门管理Controller
 */
@Slf4j
@RestController
public class DeptController {
    @Autowired
    private DeptService deptService;

    //查询部门
    @GetMapping("/depts")
    public Result list(){
        log.info("查询全部部门数据");

        List<Dept> deptList = deptService.list();

        return Result.success(deptList);
    }

    //根据id删除部门
    @DeleteMapping("/depts/{id}")
    public Result deleteById(@PathVariable Integer id){
        log.info("根据id删除部门"+id);

        deptService.delete(id);
        return Result.success();
    }

    //新增部门
    @PostMapping("/depts")
    public Result add(@RequestBody Dept dept){
        log.info("新增部门"+dept);

        deptService.add(dept);
        return Result.success();
    }

    //修改部门
    @GetMapping("/depts/{id}")
    public Result getByID(@PathVariable Integer id) {
        log.info("获取部门ID:{}",id);
        Dept dept = deptService.getByID(id);
        return Result.success(dept);
    }
    @PutMapping("/depts")
    public Result update(@RequestBody Dept dept) {
        log.info("修改部门:{}",dept);
        deptService.update(dept);
        return Result.success();
    }



}

service包

$DeptService$

java 复制代码

package com.itheima.service;

import com.itheima.pojo.Dept;

import java.util.List;

/**
 * 部门管理
 */
public interface DeptService {
    //查询部门
    List<Dept> list();

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

    //添加部门
    void add(Dept dept);

    //修改部门
    Dept getByID(Integer id);
    void update(Dept dept);
}

$DeptServiceImpl$

java 复制代码

package com.itheima.service.impl;

import com.itheima.mapper.DeptMapper;
import com.itheima.pojo.Dept;
import com.itheima.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class DeptServiceImpl implements DeptService {

    @Autowired
    private DeptMapper deptMapper;

    //查询部门
    @Override
    public List<Dept> list() {
        return deptMapper.list();
    }

    //根据id删除部门
    @Override
    public void delete(Integer id) {
        deptMapper.deleteById(id);
    }

    //新增部门
    @Override
    public void add(Dept dept) {
        dept.setCreateTime(LocalDateTime.now());
        dept.setUpdateTime(LocalDateTime.now());
        deptMapper.add(dept);

    }

    //修改部门
    @Override
    public Dept getByID(Integer id) {
        Dept dept = deptMapper.getByID(id);
        return dept;
    }

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


}

mapper包

$DeptMapper$

java 复制代码

package com.itheima.mapper;

import com.itheima.pojo.Dept;
import org.apache.ibatis.annotations.*;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;

/**
 * 部门管理
 */
@Mapper
public interface DeptMapper {
    //查询部门
    @Select("select * from dept")
    List<Dept> list();

    //删除部门
    @Delete("delete from dept where id = #{id}")
    void deleteById(Integer id);

    //新增部门
    @Insert("insert into dept(name,create_time,update_time) values (#{name},#{createTime},#{updateTime})")
    void add(Dept dept);

    //修改部门
    @Select("select * from dept where id = #{id}")
    Dept getByID(Integer id);

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

pojo包

$Dept$

java 复制代码

package com.itheima.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDateTime;

/**
 * 部门实体类
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Dept {
    private Integer id; //ID
    private String name; //部门名称
    private LocalDateTime createTime; //创建时间
    private LocalDateTime updateTime; //修改时间
}

$Result$

java 复制代码

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);
    }
}

案例-员工管理

分页查询

分析

实现

小结

分页插件ParamHelper

条件分页查询

实现

小结

删除员工

思路

实现

新增员工

思路

实现

代码实现

controller包

$EmpController$

java 复制代码

package com.itheima.controller;

import com.itheima.mapper.EmpMapper;
import com.itheima.pojo.Emp;
import com.itheima.pojo.PageBean;
import com.itheima.pojo.Result;
import com.itheima.service.DeptService;
import com.itheima.service.EmpService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDate;
import java.util.List;

/**
 * 员工管理Controller
 */
@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {
    @Autowired
    private EmpService empService;

    @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
                       ) {
        log.info("分页查询，参数：{},{},{},{},{},{}",page,pageSize,name,gender,begin,end);
        //调用service分页查询
        PageBean pageBean = empService.page(page,pageSize,name,gender,begin,end);
        return Result.success(pageBean);
    }

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

    @PostMapping
    public Result save(@RequestBody Emp emp) {
        log.info("新增员工：{}",emp);
        empService.save(emp);
        return Result.success();
    }


}

service包

$EmpService$

java 复制代码

package com.itheima.service;

import com.itheima.pojo.Emp;
import com.itheima.pojo.PageBean;

import java.time.LocalDate;
import java.util.List;

/**
 * 员工管理
 */
public interface EmpService {
    PageBean page(Integer page, Integer pageSize, String name, short gender, LocalDate begin, LocalDate end);

    //批量删除
    void delete(List<Integer> ids);

    //新增员工
    void save(Emp emp);
}

$EmpServiceImpl$

java 复制代码

package com.itheima.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.itheima.mapper.EmpMapper;
import com.itheima.pojo.Emp;
import com.itheima.pojo.PageBean;
import com.itheima.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.List;

@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) {
        //1.设置分页参数
        PageHelper.startPage(page, pageSize);

        //2.执行查询
        List<Emp> empList = empMapper.list(name,gender,begin,end);
        Page<Emp> p = (Page<Emp>) empList;

        //3.封装PageBean对象
        PageBean pageBean = new PageBean(p.getTotal(),p.getResult());
        return pageBean;

    }

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

    @Override
    public void save(Emp emp) {
        emp.setCreateTime(LocalDateTime.now());
        emp.setUpdateTime(LocalDateTime.now());
        empMapper.save(emp);
    }
}

mapper包

$EmpMapper$

java 复制代码

package com.itheima.mapper;

import com.itheima.pojo.Emp;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.time.LocalDate;
import java.util.List;

/**
 * 员工管理
 */
@Mapper
public interface EmpMapper {
    //查询总记录数
   /* @Select("select count(*) from emp")
    public Long count();*/

    //分页查询，获取列表数据
   /* @Select("select * from emp limit #{start},#{limit}")
    public List<Emp> page(Integer start, Integer limit);*/

    //@Select("select * from emp")
    public List<Emp> list(String name, short gender, LocalDate begin, LocalDate end);

    //批量删除
    void delete(List<Integer> ids);

    //新增员工
    @Insert("insert into emp(username,name,gender,image,job,entrydate,dept_id,create_time,update_time) " +
            "values(#{username},#{name},#{gender},#{image},#{job},#{entrydate},#{deptId},#{createTime},#{updateTime})")
    void save(Emp emp);
}

pojo包

$Emp$

java 复制代码

package com.itheima.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDate;
import java.time.LocalDateTime;

/**
 * 员工实体类
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Emp {
    private Integer id; //ID
    private String username; //用户名
    private String password; //密码
    private String name; //姓名
    private Short gender; //性别 , 1 男, 2 女
    private String image; //图像url
    private Short job; //职位 , 1 班主任 , 2 讲师 , 3 学工主管 , 4 教研主管 , 5 咨询师
    private LocalDate entrydate; //入职日期
    private Integer deptId; //部门ID
    private LocalDateTime createTime; //创建时间
    private LocalDateTime updateTime; //修改时间
}

$PageBean$

java 复制代码

package com.itheima.pojo;

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

import java.util.List;

/*
* 分页查询结果封装类
* */

@Data
@NoArgsConstructor
@AllArgsConstructor
public class PageBean {

    private long total;//总记录数
    private List rows;//数据列表


}

$Result$

java 复制代码

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);
    }
}