java 自定义异常类

我会带着你远行 2022-08-20 13:24 177阅读 0赞

**异常代码接口：**

package com.bjhy.dataz.common.exception;
    
    /**
     * 
     * <pre>
     * 异常代码接口
     * 用枚举对此接口进行实现，并配合DataZException异常类产出异常
     * 
     * </pre>
     * 
     */
    public interface ErrorCode {
    	// 错误码编号
    	String getCode();
    
    	// 错误码描述
    	String getDescription();
    
    	//打印重写
    	String toString();
    }

异常打印类

package com.bjhy.dataz.common.exception;
    
    import java.io.PrintWriter;
    import java.io.StringWriter;
    
    /**
     * 异常打印
     * 
     *
     */
    public final class ExceptionTracker {
        public static final int STRING_BUFFER = 1024;
    
        public static String trace(Throwable ex) {
            StringWriter sw = new StringWriter(STRING_BUFFER);
            PrintWriter pw = new PrintWriter(sw);
            ex.printStackTrace(pw);
            return sw.toString();
        }
    }

异常类

package com.bjhy.dataz.common.exception;
    
    
    /**
     * dataZ框架异常类
     *
     *
     */
    public class DataZException extends RuntimeException {
    
        private static final long serialVersionUID = 1L;
    
        private ErrorCode errorCode;
    
        public DataZException(ErrorCode errorCode, String errorMessage) {
            super(errorCode.toString() + " - " + errorMessage);
            this.errorCode = errorCode;
        }
    
        private DataZException(ErrorCode errorCode, String errorMessage,
                               Throwable cause) {
            super(errorCode.toString() + " - " + getMessage(errorMessage)
                    + " - " + getMessage(cause), cause);
    
            this.errorCode = errorCode;
        }
    
        public static DataZException asDataXException(ErrorCode errorCode, String message) {
            return new DataZException(errorCode, message);
        }
    
        public static DataZException asDataXException(ErrorCode errorCode, String message,
                                                      Throwable cause) {
            if (cause instanceof DataZException) {
                return (DataZException) cause;
            }
            return new DataZException(errorCode, message, cause);
        }
    
        public static DataZException asDataXException(ErrorCode errorCode,
                                                      Throwable cause) {
            if (cause instanceof DataZException) {
                return (DataZException) cause;
            }
            return new DataZException(errorCode, getMessage(cause), cause);
        }
    
        public ErrorCode getErrorCode() {
            return this.errorCode;
        }
    
    
        private static String getMessage(Object obj) {
            if (obj == null) {
                return "";
            }
    
            if (obj instanceof Throwable) {
                return ((Throwable) obj).getMessage();
            } else {
                return obj.toString();
            }
        }
    }