类型：转载 责任编辑：asp.net 日期：2007/05/23
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正文内容：使用我写的这个class，然后再tomcat里配置一下，比在自己的webapp里配置的过滤器还要方便，高效。
一行配置就搞定：
server.xml里增加下面的配置：
<valve classname="org.apache.catalina.valves.charsetvalve" encoding="gbk"/>
可以放到engine, host, 或者 context 元素中：
例如：
<context docbase="d:\lizongbo\mywebapp" path="/lizongbo"
privileged="true" antiresourcelocking="false" antijarlocking="false">
<valve classname="org.apache.catalina.valves.charsetvalve" encoding="gbk"/>
</context>
当然这个class不存在的，于是，下面是java代码，
把编译好的class放到 d:\jakarta-tomcat-5.5.7
\server\classes\org\apache\catalina\valves\下，就可以了。
java 代码：
package org.apache.catalina.valves;
import java.io.*;
import javax.servlet.*;
import org.apache.catalina.*;
import org.apache.catalina.connector.*;
import org.apache.catalina.util.*;
/**
* <p>title: charsetvalve </p>
* <p>description: a charset filter for tomcat application</p>
* <p>copyright: apache license version 2.0 </p>
* <p>company: lizongbo</p>
* @author lizongbo @ gmail.com
* @version 1.0
*/
public class charsetvalve
extends valvebase implements lifecycle {
public charsetvalve() {
super();
}
protected lifecyclesupport lifecycle = new lifecyclesupport(this);
private stringmanager sm =
stringmanager.getmanager(constants.package);
private boolean started = false;
private string encoding = system.setproperty("file.encoding", "gbk");
public string getencoding() {
return encoding;
}
public void setencoding(string encoding) {
this.encoding = encoding;
}
public void invoke(request request, response response) throws ioexception,
servletexception {
request.getrequest().setcharacterencoding(getencoding());
getnext().invoke(request, response);
}
public void addlifecyclelistener(lifecyclelistener listener) {
lifecycle.addlifecyclelistener(listener);
}
public lifecyclelistener[] findlifecyclelisteners() {
return lifecycle.findlifecyclelisteners();
}
public void removelifecyclelistener(lifecyclelistener listener) {
lifecycle.removelifecyclelistener(listener);
}
public void start() throws lifecycleexception {
if (started) {
throw new lifecycleexception
(sm.getstring("accesslogvalve.alreadystarted"));
}
}
public void stop() throws lifecycleexception {
if (!started) {
throw new lifecycleexception
(sm.getstring("accesslogvalve.notstarted"));
}
lifecycle.firelifecycleevent(stop_event, null);
started = false;
}
}
详情请参考：
http://issues.apache.org/bugzilla/show_bug.cgi?id=32795
http://jakarta.apache.org/tomcat/tomcat-5.5-doc/config/valve.html
对了,tomcat的示例里：
d:\jakarta-tomcat-5.5.7\webapps\servlets-examples\web-inf\web.xml
里被日本人强制指定默认值为日文编码了，ft!!!!!!!!!!!!!!!!!!!!!!!!!!!
<filter>
<filter-name>set character encoding</filter-name>
<filter-class>filters.setcharacterencodingfilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>euc_jp</param-value>
</init-param>
</filter>