📄 defaulterrorhandler.java

📁 EasyJWeb是基于java技术
💻 JAVA
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package com.easyjf.web.errorhandler;

import java.io.PrintWriter;
import java.io.StringWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.velocity.exception.MethodInvocationException;

import com.easyjf.web.Page;
import com.easyjf.web.WebForm;

public class DefaultErrorHandler implements IErrorHandler {

	public Page handle(HttpServletRequest request,
			HttpServletResponse response, WebForm form, Throwable e) throws ServletException{		
		try {
			StringBuffer html = new StringBuffer();
			String title = request.getCharacterEncoding() != null ? "EasyJWeb框架错误"
					: "EasyJWeb Framework error";
			html.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n");
			html.append("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\r\n");
			html.append("<html xmlns=\"http://www.w3.org/1999/xhtml\">\r\n");
			html.append("<head><title>" + title + "</title>\r\n");
			html.append("<style type=\"text/css\">\r\n");
			html.append("#errors{\r\n");
			html.append("	clear : both;\r\n");
			html.append("}\r\n");
			html.append("ul,li{\r\n");
			html.append("	list-style-type : none;\r\n");
			html.append("}\r\n");
			html.append("#errors .title{\r\n");
			html.append("	font-weight : bold;\r\n");
			html.append("	width : 95%;\r\n");
			html.append("	border : 1px solid #E6E6E6;\r\n");
			html.append("	background-color : #FFFFAF;\r\n");
			html.append("	text-align : left;\r\n");
			html.append("	line-height : 28px;\r\n");
			html.append("	font-size : 12px;\r\n");
			html.append("	padding-left : 30px;\r\n");
			html.append("}\r\n");
			html.append("#errors #causedBy{\r\n");
			html.append("	padding : 10px 30px 0 30px;\r\n");
			html.append("	font-size : 12px;\r\n");
			html.append("	word-break: break-all;\r\n");
			html.append("	word-wrap:break-word;\r\n");
			html.append("}\r\n");
			html.append("#errors #details{\r\n");
			html.append("	border : 1px solid #E6E6E6;\r\n");
			html.append("	background-color : #FAFAFA;\r\n");
			html.append("	padding : 0 30px 0 30px;\r\n");
			html.append("	font-size : 12px;\r\n");
			html.append("	word-wrap:break-word;\r\n");
			html.append("	overflow : hidden;\r\n");
			html.append("}\r\n");
			html.append(".line{\r\n");
			html.append("	border : 1px solid #E6E6E6;\r\n");
			html.append("	height : 1px;\r\n");
			html.append("	width : 95%;\r\n");
			html.append("	clear : both;\r\n");
			html.append("}\r\n");
			html.append(".copyright{\r\n");
			html.append("	clear : both;\r\n");
			html.append("	color : #aaa;\r\n");
			html.append("	text-align : center;\r\n");
			html.append("	font-size : 12px;\r\n");
			html.append("	padding-bottom : 20px;\r\n");
			html.append("}\r\n");
			html.append("</style>\r\r\n");
			html.append("</head>\r\n");
			html.append("<body>\r\n");
			html.append("<div id=\"errors\">\r\n");
			html.append("<div class=\"title\">"+title+"</div>\r\n");
			html.append("		<ul id=\"causedBy\"><li>\r\n");
			Throwable cause = e;
			String why = cause.getMessage();
			if (why != null && why.trim().length() > 0) {
				html.append(why);
				html
				.append("\r\n<br>详细请查询<a href='http://www.easyjf.com/' target='_blank'>http://www.easyjf.com</a>\r\n");
			}
			if (cause instanceof MethodInvocationException) {
				cause = ((MethodInvocationException) cause)
				.getWrappedThrowable();
			}
			html.append("</li></ul>\r\n");
			html.append("	<div id=\"details\">\r\n");
			StringWriter sw = new StringWriter();
			cause.printStackTrace(new PrintWriter(sw));
			html.append(sw.toString());
			html.append("	</div>\r\n");
			html.append("</div>\r\n");
			html.append("<hr class=\"line\" />\r\n");
			html.append("<div class=\"copyright\">\r\n");
			html.append("	<span>&copy; 2005-2007 EasyJF 简易JAVA开源框架</span>\r\n");
			html.append("</div>\r\n");
			html.append("</body>\r\n");
			html.append("</html>");
			if (request.getCharacterEncoding() != null)
				response.setContentType("text/html; charset="
						+ request.getCharacterEncoding());
			response.getWriter().write(html.toString());
		} catch (Exception e2) {
			throw new ServletException(e);
		}
		return null;
	}
}
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