Spring Boot 进阶之Web进阶 学习

1.新建返回结果类 result.java

public class Result<T> {

    //错误码
    private Integer code;
    //提示信息
    private String msg;
    //具体内容
    private T data;

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

2.自定义异常处理类  GirlException.java

public class GirlException extends RuntimeException{

    private Integer code;

    public GirlException(ResultEnum resultEnum){
        super(resultEnum.getMsg());
        this.code = resultEnum.getCode();
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

}

3.新建服务 GirlService.java 抛出异常

public void getAge (Integer id) throws Exception{
    Girl girl = girlReposistory.findById(id).get();
    Integer age = girl.getAge();

    if(age<10){
        throw new GirlException(ResultEnum.PRIMARY_SCHOOL);　　//定义枚举,统一管理
    }else if (age >10 && age <16){
        throw new GirlException(ResultEnum.MIDDLE_SCHOOL);
    }

}

4.controller类中调用girlService.getAge(id)方法,并抛出异常

@GetMapping(value = "/getage/{id}")
public void getAge(@PathVariable("id") Integer id) throws Exception{
    girlService.getAge(id);

}

5.新建 ResultEnum.java枚举

public enum ResultEnum {
    UNKONW_ERROR(-1,"未知错误"),
    SUCCESS(0,"成功"),
    PRIMARY_SCHOOL(100,"你可能还在上小学"),
    MIDDLE_SCHOOL(101,"你可能在上初中")

    ;


    private Integer code;
    private String msg;

    ResultEnum(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public Integer getCode() {
        return code;
    }


    public String getMsg() {
        return msg;
    }


}