com.sicheng.common.utils.Exceptions Maven / Gradle / Ivy
/**
* 本作品使用 木兰公共许可证,第2版（Mulan PubL v2） 开源协议，请遵守相关条款，或者联系sicheng.net获取商用授权。
* Copyright (c) 2016 SiCheng.Net
* This software is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
package com.sicheng.common.utils;
import javax.servlet.http.HttpServletRequest;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* 关于异常的工具类.
*
* @author zhaolei
* @version 2013-01-15
*/
public class Exceptions {
/**
* 将CheckedException转换为UncheckedException.
*/
public static RuntimeException unchecked(Exception e) {
if (e instanceof RuntimeException) {
return (RuntimeException) e;
} else {
return new RuntimeException(e);
}
}
/**
* 将ErrorStack转化为String.
*/
public static String getStackTraceAsString(Throwable e) {
if (e == null) {
return "";
}
StringWriter stringWriter = new StringWriter();
e.printStackTrace(new PrintWriter(stringWriter));
return stringWriter.toString();
}
/**
* 判断异常是否由某些底层的异常引起.
*/
public static boolean isCausedBy(Exception ex, Class... causeExceptionClasses) {
Throwable cause = ex.getCause();
while (cause != null) {
for (Class causeClass : causeExceptionClasses) {
if (causeClass.isInstance(cause)) {
return true;
}
}
cause = cause.getCause();
}
return false;
}
/**
* 在request中获取异常类
*
* @param request
* @return
*/
public static Throwable getThrowable(HttpServletRequest request) {
Throwable ex = null;
if (request.getAttribute("exception") != null) {
ex = (Throwable) request.getAttribute("exception");
} else if (request.getAttribute("javax.servlet.error.exception") != null) {
ex = (Throwable) request.getAttribute("javax.servlet.error.exception");
}
return ex;
}
}