onLineStudySys项目开发过程

创建父工程maven工程

删除src等多余目录

更改仓库位置

 

 

 

 修改pom文件  标识父工程

<packaging>pom</packaging>

目录结构

 

 父工程依赖

导入数据库

 

 

 创建application.yml配置文件

 

 

 创建启动类

@SpringBootApplication
public class EduApplication {

    public static void main(String[] args) {
        SpringApplication.run(EduApplication.class, args);
    }
}

整合MP代码生成器

 

 

 

 

 创建配置类

@Configuration
@EnableTransactionManagement
@MapperScan("com.atguigu.eduservice.mapper")
public class MyBatisPlusConfig {
}

编写测试

 

 修改时间显示格式

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8

 封装swagger2

 swaggerConfig.class

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket webApiConfig(){

        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("webApi")
                .apiInfo(webApiInfo())
                .select()
                .paths(Predicates.not(PathSelectors.regex("/admin/.*")))  //不暴露超级用户接口信息
                .paths(Predicates.not(PathSelectors.regex("/error.*")))
                .build();

    }

    private ApiInfo webApiInfo(){

        return new ApiInfoBuilder()
                .title("网站-课程中心API文档")
                .description("本文档描述了课程中心微服务接口定义")
                .version("1.0")
                .contact(new Contact("Hello", "http://xxx.com", "12345678@qq.com"))
                .build();
    }


}

在service模块下引入依赖

<dependency>
            <groupId>org.husong</groupId>
            <artifactId>service_base</artifactId>
            <version>V-1.0</version>
        </dependency>

添加注解扫描包

测试一下

 

 

http://localhost:8001/swagger-ui.html

分页获取

 

 

@ApiOperation(value = "分页获取讲师列表")
    @PostMapping("getTeacherPage/{current}/{limit}")
    public R getTeacherPage(@PathVariable Long current,
                            @PathVariable Long limit,
                            @RequestBody TeacherQuery teacherQuery){
        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        if(!StringUtils.isEmpty(name)){
            wrapper.like("name",name); //第一个name是数据库字段名
        }
        if(!StringUtils.isEmpty(level)){
            wrapper.eq("level",level); //第一个level是数据库字段名
        }
        if(!StringUtils.isEmpty(begin)){
            wrapper.ge("gmt_create",begin); //第一个gmt_create是数据库字段名
        }
        if(!StringUtils.isEmpty(end)){
            wrapper.le("gmt_create",end); //第一个gmt_create是数据库字段名
        }
        Page<EduTeacher> page = new Page<>(current,limit);
        eduTeacherService.page(page,wrapper);
        List<EduTeacher> list = page.getRecords();
        long total = page.getTotal();
        Map<String,Object> map = new HashMap<>();
        map.put("list",list);
        map.put("total",total);
        return R.ok().data(map);
    }

结果封装

 

 

@Data
public class R {
    @ApiModelProperty(value = "是否成功")
    private Boolean success;

    @ApiModelProperty(value = "返回码")
    private Integer code;

    @ApiModelProperty(value = "返回消息")
    private String message;

    @ApiModelProperty(value = "返回数据")
    private Map<String, Object> data = new HashMap<String, Object>();

    private R(){}

    public static R ok(){
        R r = new R();
        r.setSuccess(true);
        r.setCode(ResultCode.SUCCESS);
        r.setMessage("成功");
        return r;
    }

    public static R error(){
        R r = new R();
        r.setSuccess(false);
        r.setCode(ResultCode.ERROR);
        r.setMessage("失败");
        return r;
    }

    public R success(Boolean success){
        this.setSuccess(success);
        return this;
    }

    public R message(String message){
        this.setMessage(message);
        return this;
    }

    public R code(Integer code){
        this.setCode(code);
        return this;
    }

    public R data(String key, Object value){
        this.data.put(key, value);
        return this;
    }

    public R data(Map<String, Object> map){
        this.setData(map);
        return this;
    }

}

 

 统一异常处理

 

 

@Data
@AllArgsConstructor
@NoArgsConstructor
public class MyException extends RuntimeException{
    @ApiModelProperty("状态码")
    private Integer code;
    private String msg;
}

@ControllerAdvice    //aop编程，不改变原有功能和代码，实现添加额外功能
public class GlobalExceptionHandler {
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public R error(Exception e){
        e.printStackTrace();
        return R.error();
    }

    @ExceptionHandler(MyException.class)
    @ResponseBody
    public R error(MyException e){
        e.printStackTrace();
        return R.error().message(e.getMsg()).code(e.getCode());
    }
}