Web项目异常信息设计及CommonResponse设计

1.异常类设计

CommonException类

@Data  
public class CommonException extends RuntimeException{  
  
    private MessageKey messageKey;  
  
    public CommonException(MessageKey messageKey,String message){  
        super(message);  
        this.messageKey = messageKey;  
    }  
}

MessageKey接口,该接口定义异常信息key类的方法

public interface MessageKey {  
    String getKey();  
    int getCode();  
}

UserMessageKey：MessageKey的实现类

public enum UserMessageKey implements MessageKey{  
  
    USER_NAME_ERROR("USER_NAME_ERROR",1000),  
    USER_PASSWORD_ERROR("USER_PASSWORD_ERROR",1001),  
    LOGIN_SUCCESS("LOGIN_SUCESS",1005);  
  
    private Integer code;  
  
    private String key;  
  
    UserMessageKey(String key,Integer code){  
        this.code = code;  
        this.key = key;  
    }  
  
    @Override  
  public String getKey() {  
        return this.key;  
    }  
  
    @Override  
  public int getCode() {  
        return this.code;  
    }  
}

使用demo

messageSource.getMessage(UserMessageKey.USER_NAME_ERROR.getKey(),null,UserMessageKey.USER_NAME_ERROR.getKey()

在messageSource配置表中增加USER_NAME_ERROR对应的各种语言value

UserException用户异常类，继承CommonException

public class UserException extends CommonException{  
  
    public UserException(MessageKey messageKey, String message) {  
        super(messageKey, message);  
    }  
  
}

2.Response类设计

@Data
public class CommonResponse<T> {

    private Integer code;
    private Boolean success;
    private String message;
    private T data;

    //默认结果
    public CommonResponse(){
        this.code = 200;
        this.success = true;
    }

    //返回数据但没有提示信息
    public static <T> CommonResponse of(T data) {
        CommonResponse commonResponse = new CommonResponse();
        commonResponse.setData(data);
        return commonResponse;
    }

    //返回数据带提示信息
    public static <T> CommonResponse of(T data,String message){
        CommonResponse commonResponse = new CommonResponse();
        commonResponse.setData(data);
        commonResponse.setMessage(message);
        return commonResponse;
    }

    //错误信息提示，message为提示信息，code为返回异常状态值
    public static <T> CommonResponse of(String message,Integer code){
        CommonResponse commonResponse = new CommonResponse();
        commonResponse.setMessage(message);
        commonResponse.setCode(code);
        commonResponse.setSuccess(false);
        return commonResponse;
    }
}