1.解決POST傳送亂碼的問題．
<filter>
??? <filter-name>Set Character Encoding</filter-name>
??? <filter-class>com.util.filters.SetCharacterEncodingFilter</filter-class>
??? <init-param>
????? <param-name>encoding</param-name>
????? <param-value>UTF-8</param-value>
??? </init-param>
? </filter>
? <filter-mapping>
??? <filter-name>Set Character Encoding</filter-name>
??? <url-pattern>/*</url-pattern>
? </filter-mapping>
SetCharacterEncodingFilter:
package com.util.filters;
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;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SetCharacterEncodingFilter
??? implements Filter {
? protected String encoding = null;
? protected FilterConfig filterConfig = null;
? protected boolean ignore = true;
? public void destroy() {
??? this.encoding = null;
??? this.filterConfig = null;
? }
? public void doFilter(ServletRequest request, ServletResponse response,
?????????????????????? FilterChain chain) throws IOException, ServletException {
??? // Conditionally select and set the character encoding to be used
?? request.setCharacterEncoding("GBK");
??? // Pass control on to the next filter
??? chain.doFilter(request, response);
? }
? public void init(FilterConfig filterConfig) throws ServletException {
??? this.filterConfig = filterConfig;
??? this.encoding = filterConfig.getInitParameter("encoding");
??? String value = filterConfig.getInitParameter("ignore");
??? if (value == null) {
????? this.ignore = true;
??? }
??? else if (value.equalsIgnoreCase("true")) {
????? this.ignore = true;
??? }
??? else if (value.equalsIgnoreCase("yes")) {
????? this.ignore = true;
??? }
??? else {
????? this.ignore = false;
??? }
? }
? protected String selectEncoding(ServletRequest request) {
??? return (this.encoding);
? }
}
2．解決GET方式出現亂碼的方案
tomcat的server.xml中
<Connector connectionTimeout="20000" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="8080" redirectPort="8443" uRIEncoding="UTF-8" useBodyEncodingForURI="true">
</Connector>
注意其中的useBodyEncodingForURI="true"這句是是解決問題的關鍵，但缺省情況下沒有，自己加進去。
然后再用Filter方案解決 解決GET的問題
3.亂碼字符轉換
byte[] bytes = str.getBytes("ISO8859-1");
??? String dept=new String(bytes);
AJAX
在用XMLHttpRequest發送請求時如用post方式傳送數據,容易出現中文亂碼問題!
在Ajax中,默認的編碼方式是UTF-8,所以在服務器端用request.setCharacterEncoding("UTF-8");(對于java言,其它語言可能類似方法)設置編碼即可解決大部份的編碼問題!
?對于服務器端返回的XML文件在用responseXML讀取時也要注意編碼問題!
以下是正確的處理方法：
response.setCharacterEncoding("UTF-8");-----(1)
PrintWriter out=response.getWriter();------(2)
out.println("返回內容");
如上所示,如果1、2的先后順序發生變化就會產生亂碼！