自定义异常类

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自己写了一个自定义异常类，其实还是很简单的。

首先写一个枚举类，错误类型

package Exception;public enum ErrorType {UNKNOW("未知错误"),DATA("数据错误"),VALIDATE("校验错误");    private String message;//异常信息private ErrorType(String str){this.message = str;}public String getMessage() {return message;}}

自定义异常类

package Exception;public class MyBusinessException extends RuntimeException {private static final long serialVersionUID = 1L;private ErrorType  errorType = ErrorType.UNKNOW;private String errorMessage = null;/**自定义异常构造器，传入错误类型和源异常*/public MyBusinessException(ErrorType errorType, Throwable t){super(t);this.errorType = errorType;this.errorMessage = "["+errorType.getMessage()+ "]";}/**自定义异常构造器，传入错误信息和源异常*/public MyBusinessException(String errorMessage, Throwable t){super(t);this.errorMessage = errorMessage;}/**自定义异常构造器，传入异常类型、错误信息、源异常*/public MyBusinessException(ErrorType errorType,String errorMessage, Throwable t){super(t);this.errorType = errorType;this.errorMessage = "[" +errorType.getMessage()+"]-" + errorMessage;}/**自定义异常构造器，传入异常类型、错误信息*/public MyBusinessException(ErrorType errorType,String errorMessage){this.errorType = errorType;this.errorMessage = "[" +errorType.getMessage()+ "]-" + errorMessage;}/**自定义异常构造器，传入错误信息*/public MyBusinessException(String errorMessage){this.errorMessage = errorMessage;}public ErrorType getErrorType() {return errorType;}public void setErrorType(ErrorType errorType) {this.errorType = errorType;}public String getErrorMessage() {return errorMessage;}/** * 返回异常信息 */public String getMessage(){if(this.errorMessage != null){return this.errorMessage;}else{return "未知的错误";}}public String toString(){String s = getClass().getName();String message = getMessage();return (message != null) ? s + ":" + message : s;}}

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