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<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- 字符过滤器-->
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>com.pro.filter.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>*.act</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>*.html</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
package com.pro.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class EncodingFilter implements Filter {
private FilterConfig filterConfig = null;
public void init(FilterConfig fc) throws ServletException {
this.filterConfig = fc;
}
public void doFilter(ServletRequest req, ServletResponse res,
FilterChain chain) throws IOException, ServletException {
String encoding = filterConfig.getInitParameter("encoding");
req.setCharacterEncoding(encoding);
res.setCharacterEncoding(encoding);
res.setContentType("text/html;charset=" + encoding);
System.err.println("encoding"+encoding);
System.err.println(req.getCharacterEncoding());
System.err.println(res.getCharacterEncoding());
System.err.println(res.getContentType());
chain.doFilter(req, res);
}
public void destroy() {
this.filterConfig = null;
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<form action="test.jsp" method="get">
<input type="text" name="message" />
<input type="submit">
</form>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%=request.getParameter("message") %>