JavaWeb开发教程：2023.4.1坚持第34天，SpringBootWeb案例

前言

记录时间：2023.4.1

已坚持学习第34天

java从入门到精通

学习java时间历程记录打卡

早上7：00到 12：00

下午2：00到 5：00

JavaWeb-SpringBootWeb案例总结

完成代码练习

数据库设计

-- 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());

案例练习

1.目录结构

1.controller控制类

package cn.vqqc.controller;

import cn.vqqc.pojo.Dept;
import cn.vqqc.pojo.Result;
import cn.vqqc.service.DeptService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * 部门管理Controller
 */
@Slf4j
@RequestMapping("/depts")
@RestController
public class DeptController {

    //private static Logger log = LoggerFactory.getLogger(DeptController.class);
    @Autowired
    private DeptService deptService;

    /**
     * 查询部门数据
     * @return
     */
    //@RequestMapping(value = "/depts",method = RequestMethod.GET) //指定请求方式为GET
    @GetMapping
    public Result list(){
        log.info("查询全部部门数据");
        //调用service查询部门数据
        List<Dept> deptList =  deptService.list();
        return Result.success(deptList);
    }


    /**
     * 删除部门
     * @return
     */
    @DeleteMapping("/{id}")
    public Result delete(@PathVariable Integer id){
        log.info("根据id删除部门:{}",id);
        //调用service删除部门
        deptService.delete(id);
        return Result.success();
    }


    /**
     * 新增部门
     * @return
     */
    @PostMapping
    public Result add(@RequestBody Dept dept){
        log.info("新增部门: {}" , dept);
        //调用service新增部门
        deptService.add(dept);
        return Result.success();
    }
}

package cn.vqqc.controller;

import cn.vqqc.pojo.PageBean;
import cn.vqqc.pojo.Result;
import cn.vqqc.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("批量删除操作, ids:{}",ids);
        empService.delete(ids);
        return Result.success();
    }
}

2.mapper接口类

package cn.vqqc.mapper;


import cn.vqqc.pojo.Dept;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

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

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

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

package cn.vqqc.mapper;

import cn.vqqc.pojo.Emp;
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
     * @return
     */
    //@Select("select count(*) from emp")
    //public Long count();

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

    /**
     * 员工信息查询
     * @return
     */
    //@Select("select * from emp")
    public List<Emp> list(String name, Short gender,LocalDate begin,LocalDate end);

    /**
     * 批量删除
     * @param ids
     */
    void delete(List<Integer> ids);
}

3.定义pojo实体类

package cn.vqqc.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
}

package cn.vqqc.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
}

package cn.vqqc.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

}

package cn.vqqc.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);
    }
}

4.定义服务类

package cn.vqqc.service.impl;

import cn.vqqc.mapper.DeptMapper;
import cn.vqqc.pojo.Dept;
import cn.vqqc.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;

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

    @Override
    public void delete(Integer id) {
        deptMapper.deleteById(id);
    }

    @Override
    public void add(Dept dept) {
        dept.setCreateTime(LocalDateTime.now());
        dept.setUpdateTime(LocalDateTime.now());

        deptMapper.insert(dept);
    }
}

package cn.vqqc.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import cn.vqqc.mapper.EmpMapper;
import cn.vqqc.pojo.Emp;
import cn.vqqc.pojo.PageBean;
import cn.vqqc.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

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

@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;
        List<Emp> empList = empMapper.page(start, pageSize);

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


    @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;
    }

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

package cn.vqqc.service;

import cn.vqqc.pojo.Dept;

import java.util.List;

/**
 * 部门管理
 */
public interface DeptService {
    /**
     * 查询全部部门数据
     * @return
     */
    List<Dept> list();

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

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

package cn.vqqc.service;

import cn.vqqc.pojo.PageBean;
import org.springframework.format.annotation.DateTimeFormat;

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

/**
 * 员工管理
 */
public interface EmpService {
    /**
     * 分页查询
     * @param page
     * @param pageSize
     * @return
     */
    PageBean page(Integer page, Integer pageSize,String name, Short gender,LocalDate begin,LocalDate end);

    /**
     * 批量删除
     * @param ids
     */
    void delete(List<Integer> ids);
}

5.EmpMapper.xml

<?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="cn.vqqc.mapper.EmpMapper">
    <!--批量删除员工 (1, 2, 3)-->
    <delete id="delete">
        delete
        from emp
        where id in
        <foreach collection="ids" item="id" separator="," open="(" close=")">
            #{id}
        </foreach>
    </delete>

    <!--条件查询-->
    <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>

6.连接数据库配置

#驱动类名称
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#数据库连接的url
spring.datasource.url=jdbc:mysql://localhost:3306/tlias
#连接数据库的用户名
spring.datasource.username=root
#连接数据库的密码
spring.datasource.password=1234

#配置mybatis的日志, 指定输出到控制台
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
#开启mybatis的驼峰命名自动映射开关 a_column ------> aCloumn
mybatis.configuration.map-underscore-to-camel-case=true

7.pom.xml

<?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>3.0.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.vqqc</groupId>
    <artifactId>tlias-web-management</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>tlias-web-management</name>
    <description>tlias-web-management</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <!--web起步依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--mybatis起步依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>3.0.0</version>
        </dependency>

        <!--mysql驱动-->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--springboot单元测试-->
        <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>
            </plugin>
        </plugins>
    </build>

</project>