解决Tomcat中文文件名下载问题

本篇来源于：http://piggysnow.sinaapp.com/archives/29 我做下补充，记录一下

package com.utils;

import java.io.IOException;

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

import org.apache.catalina.Globals;
import org.apache.catalina.servlets.DefaultServlet;

/**
* 此类是为了解决 下载tomcat中的中文文件时连接错误的问题
* 解决办法1(也是此类)：此类来源于网络：http://piggysnow.sinaapp.com/archives/29，需要注意的是在部署此项目的时候，需要把项目中的catalina.jar删除，否则会包冲突错误[tomcat启动正常，而页面却总是无内容显示的错误]

* 解决办法2：在tomcat中server.xml 大概70行的位置添加：URIEncoding="utf-8"
* @date：下午1:29:07 2012-12-28
*/
public class DownloadCharacterEncodingServlet extends DefaultServlet {
/**
*
*/
private static final long serialVersionUID = 2551697592701704614L;

/**
* Return the relative path associated with this servlet.
*
* @param request The servlet request we are processing
*/
protected String getRelativePath(HttpServletRequest request) {
// IMPORTANT: DefaultServlet can be mapped to ‘/’ or ‘/path/*’ but always
// serves resources from the web app root with context rooted paths.
// i.e. it can not be used to mount the web app root under a sub-path
// This method must construct a complete context rooted path, although
// subclasses can change this behaviour.

// Are we being processed by a RequestDispatcher.include()?
if (request.getAttribute(Globals.INCLUDE_REQUEST_URI_ATTR) != null) {
String result = (String) request.getAttribute(
Globals.INCLUDE_PATH_INFO_ATTR);
if (result == null) {
result = (String) request.getAttribute(
Globals.INCLUDE_SERVLET_PATH_ATTR);
} else {
result = (String) request.getAttribute(
Globals.INCLUDE_SERVLET_PATH_ATTR) + result;
}
if ((result == null) || (result.equals(""))) {
result = "/";
}
return (result);
}

String result = request.getPathInfo();
if (result == null) {
result = request.getServletPath();
} else {
result = request.getServletPath() + result;
}
if ((result == null) || (result.equals(""))) {
result = "/";
}
try{
result = new String(result.getBytes("ISO-8859-1"), "UTF-8");
}
catch (Exception e) {
}
return (result);

}

@Override
protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
super.doGet(req, resp);
}

@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws IOException, ServletException {
super.doGet(request, response);
}

@Override
protected void doPut(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
super.doGet(req, resp);
}
}

Web.xml配置一下servlet：

<servlet>
<servlet-name>chnURIServlet</servlet-name>
<servlet-class>com.utils.DownloadCharacterEncodingServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>chnURIServlet</servlet-name>
<url-pattern>/xls/*</url-pattern>
</servlet-mapping>

需要注意的的是：要把那个jar包删除掉：不然会报如下错误：

2012-12-28 13:40:30 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
java.lang.ClassCastException: org.apache.naming.resources.ProxyDirContext cannot be cast to org.apache.naming.resources.ProxyDirContext
at org.apache.catalina.servlets.DefaultServlet.init(DefaultServlet.java:305)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1206)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:619)
2012-12-28 13:40:30 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet chnURIServlet
java.lang.ClassCastException: org.apache.naming.resources.ProxyDirContext cannot be cast to org.apache.naming.resources.ProxyDirContext
at org.apache.catalina.servlets.DefaultServlet.init(DefaultServlet.java:305)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1206)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:619)