本文為大家分享了JSP用過濾器解決request中文亂碼問題，具體內容如下
（1）用戶端的資料一般是通過HTTP GET/POST方式提交給伺服器，在伺服器端用request.getParameter()
讀取參數時，很容易出現中文亂碼現象。
（2）用過濾器解決request中文亂碼問題。
（3）代碼如下：
package my; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class ChineseFilter implements Filter { //定義了一個過濾器 實現Filter介面 private FilterConfig config = null; public void init(FilterConfig config) throws ServletException { this.config = config; } public void destroy() { config = null; } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { request.setCharacterEncoding("GB2312"); chain.doFilter(request, response); //把過濾後的request對象轉寄給下一個過濾器處理 } }
（4）部署過濾器。編輯WEB-INF\web.xml檔案，添加以下內容：
<filter> <filter-name>cf</filter-name> <filter-class>my.ChineseFilter</filter-class> </filter> <filter-mapping> <filter-name>cf</filter-name> <url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> </filter-mapping>
這裡的<dispatcher></dispatcher>主要是配合RequestDispatcher使用。
（5）建立一個jsp頁面檢驗
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>無標題文檔</title> </head> <body> <% String s=request.getParameter("data"); out.print(s); %> </body> </html>
以上就是關於JSP解決request中文亂碼問題的方法，希望對大家的學習有所協助。
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