Java自定义状态码和分类

public class Constants {
 
  
  public static final String EMPTY_STR ="";
  
  public static final String SESSION_USER ="session_user";
  
  /**
   * 客户端状态码定义
   */
  public static final class STATUS_CODE {
    
    /** 1  请求成功*/
    public static final int REQUEST_SUCCESS = 1;
    public static final String REQUEST_SUCCESS_TEXT = "请求成功";
    
    /** 1001 参数*/
    public static final int PARAM_INCOMPLETE = 1001;
    public static final String PARAM_INCOMPLETE_TEXT = "参数不完整";
    
    /** 1002  参数不合法*/
    public static final int PARAM_ILLEGAL = 1002;
    public static final String PARAM_ILLEGAL_TEXT = "参数不合法";
    
    /** 1003 密码错误*/
    public static final int PWD_INCORRECT = 1003;
    public static final String PWD_INCORRECT_TEXT = "旧密码错误";
  
    
  }
}