Spring Boot 進階之Web進階 學習 - 統一異常處理

1.新建返回結果類 result.java

public class Result<T> {

    //錯誤碼
    private Integer code;
    //提示信息
    private String msg;
    //具體內容
    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.自定義異常處理類  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.新建服務 GirlService.java 拋出異常

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);　　//定義枚舉,統一管理
    }else if (age >10 && age <16){
        throw new GirlException(ResultEnum.MIDDLE_SCHOOL);
    }

}

4.controller類中調用girlService.getAge(id)方法,並拋出異常

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

}

5.新建 ResultEnum.java枚舉

public enum ResultEnum {    UNKONW_ERROR(-1,"未知錯誤"),    SUCCESS(0,"成功"),    PRIMARY_SCHOOL(100,"你可能還在上小學"),    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;    }}