public class SimpleException extends RuntimeException {
    private String msg ;
    private StatusCode statusCode ;
 
    public SimpleException(StatusCode statusCode, String msg) {
        super(msg) ;
        this.msg = msg ;
        this.statusCode = statusCode ;
    }
 
    public SimpleException(StatusCode statusCode, String msg, Throwable e) {
        super(msg, e) ;
        this.msg = msg ;
        this.statusCode = statusCode ;
    }
 
    public StatusCode getStatusCode() {
        return statusCode;
    }
 
    public void setStatusCode(StatusCode statusCode) {
        this.statusCode = statusCode;
    }
 
    @Override
    public String toString() {
        return "登陸異常："+this.statusCode+" "+this.msg ;
    }
}
 

public enum  StatusCode {
    UNKNOWN_ERR("未知錯誤",0),
    USERNAME_OR_PASSWORD_ERR("使用者名稱密碼錯誤", 1),
    REANLNAME_OR_IDNUMBER_ERR("姓名身份證號錯誤", 2),
    SMS_CODE_ERR("驗證碼錯誤", 3),
    REDIS_ERR("Redis操作異常",4),
    GENERAL_ERR("一般異常",5),
    HTTP_POST_ERR("http post 請求異常",6),
    HTTP_GET_ERR("http get 請求異常",7);
    // 成員變數
    private String name;
    private Integer index;
    // 構造方法
    private StatusCode(String name, Integer index) {
        this.name = name;
        this.index = index;
    }
    // 普通方法
    public static String getName(Integer index) {
        for (StatusCode c : StatusCode.values()) {
            if (c.getIndex() == index) {
                return c.name;
            }
        }
        return null;
    }
    // get set 方法
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getIndex() {
        return index;
    }
    public void setIndex(Integer index) {
        this.index = index;
    }
 
    @Override
    public String toString() {
        return this.index+":"+this.name;
    }
}