Kevin的技術家園

一、新建一個Filter，代碼如下：
package com.suzhou.util;

import java.io.IOException;
import javax.servlet.*;

public class SetCharacterEncodingFilter implements Filter {
?protected String encoding = null;// ///要制定的編碼，在web.xml中配置

?protected FilterConfig filterConfig = null;

?public void destroy() {
??this.encoding = null;
??this.filterConfig = null;
?}

?public void doFilter(ServletRequest request, ServletResponse response,
???FilterChain chain) throws IOException, ServletException {

??if (request.getCharacterEncoding() == null) {
???String encoding = getEncoding();// //得到指定的編碼名字
???if (encoding != null)
????request.setCharacterEncoding(encoding);// //設置request的編碼
??}
??chain.doFilter(request, response);// /有機會執行下一個filter
?}

?public void init(FilterConfig filterConfig) throws ServletException {

??this.filterConfig = filterConfig;
??this.encoding = filterConfig.getInitParameter("encoding");// /得到在web.xml中配置的編碼
?}

?protected String getEncoding() {

??return (this.encoding);// /得到指定的編碼

?}

}
二、修改web.xml，添加：
<filter>
??<filter-name>SetCharacterEncoding</filter-name>
??<filter-class>com.suzhou.util.SetCharacterEncodingFilter</filter-class>
??<init-param>
???<param-name>encoding</param-name>
???<param-value>GBK</param-value>
??</init-param>
?</filter>
?<filter-mapping>
??<filter-name>SetCharacterEncoding</filter-name>
??<url-pattern>/*</url-pattern>
?</filter-mapping>
三、進入http://localhost:port/admin，選擇Tomcat server/Service/Connector(port)，把URI Encoding改成UTF-8，Use Body Encoding For URI Query Parameters:設置為true，點保存然后重新啟動Tomcat即可。
記住，每個jsp頁面的編碼都為：
<%@ page contentType="text/html; charset=GBK" language="java" import="java.sql.*" errorPage="" %>

這樣子不但能徹底解決中文參數問題（如http://menglikn:4000/suzhou/getMap.do?ditu=市區圖），而且還能解決中文URL問題（如http://menglikun:4000/suzhou/空白頁.html）