day07---（05）课程发布-添加课程信息（后端）

1、准备工作

（1）表关系说明

（2）使用代码生成器生成课程相关代码

package com.atguigu.eduservice;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.Test;
public class CodeGenerator {
    @Test
    public void run() {
       // 1、创建代码生成器
        AutoGenerator mpg = new AutoGenerator();
        // 2、全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("testjava");
        gc.setOpen(false); //生成后是否打开资源管理器
        gc.setFileOverride(false); //重新生成时文件是否覆盖
        gc.setServiceName("%sService");    //去掉Service接口的首字母I
        gc.setIdType(IdType.ID_WORKER_STR); //主键策略
        gc.setDateType(DateType.ONLY_DATE);//定义生成的实体类中日期类型
        gc.setSwagger2(true);//开启Swagger2模式
        mpg.setGlobalConfig(gc);
        // 3、数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://localhost:3306/guli?serverTimezone=GMT%2B8");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("guli");
        dsc.setPassword("123123");
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);
        // 4、包配置
        PackageConfig pc = new PackageConfig();
        //com.atguigu.eduservice
        pc.setModuleName("eduservice"); //模块名
        pc.setParent("com.atguigu");
        pc.setController("controller");
        pc.setEntity("entity");
        pc.setService("service");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);
        // 5、策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setInclude("edu_course_description","edu_course");
        strategy.setNaming(NamingStrategy.underline_to_camel);//数据库表映射到实体的命名策略
        strategy.setTablePrefix(pc.getModuleName() + "_"); //生成实体时去掉表前缀
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);//数据库表字段映射到实体的命名策略
        strategy.setEntityLombokModel(true); // lombok 模型 @Accessors(chain = true) setter链式操作
        strategy.setRestControllerStyle(true); //restful api风格控制器
        strategy.setControllerMappingHyphenStyle(true); //url中驼峰转连字符
        mpg.setStrategy(strategy);
        // 6、执行
        mpg.execute();
    }
}

注意：自动生成的代码需要手动添加自动注入注解

@TableField(fill = FieldFill.INSERT)
@ApiModelProperty(value = "创建时间")
private Date gmtCreate;

@TableField(fill = FieldFill.INSERT_UPDATE)
@ApiModelProperty(value = "更新时间")
private Date gmtModified;

（2）课程描述表的id设置

@ApiModelProperty(value = "课程ID")
@TableId(value = "id", type = IdType.INPUT)
private String id;

2、添加课程接口开发

（1）创建vo类，用于课程信息封装，包含课程基本信息+课程描述

package com.atguigu.eduservice.entity.vo;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import java.math.BigDecimal;
@Data
public class CourseInfoForm {
    @ApiModelProperty(value = "课程ID")
    private String id;
    @ApiModelProperty(value = "课程讲师ID")
    private String teacherId;
    @ApiModelProperty(value = "课程分类二级ID")
    private String subjectId;
    @ApiModelProperty(value = "课程分类一级ID")
    private String subjectParentId;
    @ApiModelProperty(value = "课程标题")
    private String title;
    @ApiModelProperty(value = "课程销售价格，设置为0则可免费观看")
    private BigDecimal price;
    @ApiModelProperty(value = "总课时")
    private Integer lessonNum;
    @ApiModelProperty(value = "课程封面图片路径")
    private String cover;
    @ApiModelProperty(value = "课程简介")
    private String description;
}

（2）在EduCourseController里实现添加课程的方法

package com.atguigu.eduservice.controller;
import com.atguigu.commonutils.R;
import com.atguigu.eduservice.entity.vo.CourseInfoForm;
import com.atguigu.eduservice.service.EduCourseService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
@Api(description="课程管理")
@RestController
@RequestMapping("/eduservice/educourse")
@CrossOrigin
public class EduCourseController {
    @Autowired
    private EduCourseService courseService;
    @ApiOperation(value = "添加课程信息")
    @PostMapping("addCourseInfo")
    public R addCourseInfo(@RequestBody CourseInfoForm courseInfoForm){
        String courseId = courseService.addCourseInfo(courseInfoForm);
        return R.ok().data("courseId",courseId);
    }
}

（3）EduCourseService 接口添加方法

package com.atguigu.eduservice.service;
import com.atguigu.eduservice.entity.EduCourse;
import com.atguigu.eduservice.entity.vo.CourseInfoForm;
import com.baomidou.mybatisplus.extension.service.IService;
public interface EduCourseService extends IService<EduCourse> {
    String addCourseInfo(CourseInfoForm courseInfoForm);
}

（4）EduCourseServiceImpl接口添加方法的实现

package com.atguigu.eduservice.service.impl;
import com.atguigu.eduservice.entity.EduCourse;
import com.atguigu.eduservice.entity.EduCourseDescription;
import com.atguigu.eduservice.entity.vo.CourseInfoForm;
import com.atguigu.eduservice.mapper.EduCourseMapper;
import com.atguigu.eduservice.service.EduCourseDescriptionService;
import com.atguigu.eduservice.service.EduCourseService;
import com.atguigu.servicebase.handler.GuliException;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {

    @Autowired
    private EduCourseDescriptionService courseDescriptionService;
    //添加课程信息
    @Override
    public String addCourseInfo(CourseInfoForm courseInfoForm) {
        //1添加课程信息
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoForm,eduCourse);
        int insert = baseMapper.insert(eduCourse);
        if(insert==0){//添加课程信息失败
            throw new GuliException(20001,"添加课程信息失败");
        }
        //2获取添加课程后的主键id
        String courseId = eduCourse.getId();
        //3添加课程描述信息
        EduCourseDescription courseDescription = new EduCourseDescription();
        courseDescription.setId(courseId);
        courseDescription.setDescription(courseInfoForm.getDescription());
        courseDescriptionService.save(courseDescription);
        return courseId;
    }