(入門SpringBoot)SpringBoot配置全局異常(五)

Spring的全局異常,用於捕獲程序員沒有捕獲的異常。具體請看下面代碼:

1.ControllerAdvice攔截異常,統一處理.經過Spring的AOP來管理.

@ControllerAdvice
public class ExceptionHandle {

    /**
     * 要捕獲什麼異常:
     * @return 返回Result:
     */
    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Result handle(Exception e){
        e.printStackTrace();
        if(e instanceof MyException){
            MyException myException = (MyException)e;
            return ResultUtil.error(myException.getCode(),myException.getMessage());
        }else{
            return ResultUtil.error(-1,"系統錯誤,請聯繫程序員");
        }
    }


}

1. 由於原來的Exception只能夠傳msg,那麼咱們就能夠自定義本身的異常,能夠傳code:

/**
 * 自定義異常類,由於Exception拋出只能夠傳消息,太不方便了.
 *        提示:RuntimeException, 源碼:RuntimeException extends Exception
 *            而且Spring框架對RuntimeException纔會回滾.Exception不會回滾.
 * create by xxx

 * 2019-05-26
 */
public class MyException extends RuntimeException {

    private Integer code;

    public MyException(ResultEnum resultEnum){
        super(resultEnum.getMsg());//父類能夠穿個msg,Service層能夠拋出MyException.
        this.code = resultEnum.getCode();
    }

    public Integer getCode() {
        return code;
    }

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

1. 由於如今的項目有一些會返回code信息,可是隨手定義一個很差維護,咱們能夠定義成枚舉類型,對這些code,msg進行統一管理.

/**
 * created by : xxx

 * 2019-05-27
 */
public enum  ResultEnum {
    UNCO_ERROR(-1,"未知錯誤"),
    SUCCESS(0,"成功")
    ;
    /**
     * 編碼:
     */
    private Integer code;
    /**
     * 消息:
     */
    private String msg;

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

    public Integer getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}