就我在网络上找的方法罗列如下：
（Tomcat 5.0.28+struts 1.1+hibernate 2.1+sqlserver2k）
1.直接转编码
public static String isoToGB(String src)
{
String strRet=null;
try{
strRet = new String(src.getBytes("ISO_8859_1"),"GB2312");
}catch(Exception e)
{
}
return strRet;
}
通过一个函数转编码，
2.过滤filter设置法
package yourbean;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class servfilter extends HttpServlet implements Filter {
private FilterConfig filterConfig;
//Handle the passed-in FilterConfig
public void init(FilterConfig filterConfig) {
this.filterConfig = filterConfig;
}
//Process the request/response pair
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) {
try {
request.setCharacterEncoding("GB2312");
((HttpServletResponse)response).setHeader("Cache-control","no-cache");
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setHeader("Expires","0");
((HttpServletResponse)response).setHeader("Pragram","no-cache");
filterChain.doFilter(request, response);
}
catch(ServletException sx) {
filterConfig.getServletContext().log(sx.getMessage());
}
catch(IOException iox) {
filterConfig.getServletContext().log(iox.getMessage());
}
}
//Clean up resources
public void destroy() {
}
}
下面是一个web.xml文件你用jbuilder写上面的bean的时候会生成一个
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>Welcome to Tomcat</display-name>
<description>
Welcome to Tomcat
</description>
<filter>
<filter-name>servfilter</filter-name>
<filter-class>yourbean.servfilter</filter-class>
</filter>
<filter-mapping>
<filter-name>servfilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
把上面的servfilter编译放在你的web-inf/classes/yourbean/下
web.xml放在web-inf/下和classes在一个目录下
在每个jsp页面上
加上<%@page contentType="text/html;charset=GBK"%>
也不是很方便，而且在tomcat也没有成功，继续郁闷！
3.我现在使用方法，推荐！！
写一个myActionServlet来并覆盖ActionServlet中的process（）方法。
protected void process(HttpServletRequest request, HttpServletResponse response) throws java.io.IOException, javax.servlet.ServletException {
/**@todo Override this org.apache.struts.action.ActionServlet method*/
request.setCharacterEncoding("GB2312");//就加着一行一切都解决了
super.process(request, response);
}
当然别忘了改一下web.xml里面的配置
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>strutsdemo.myActionServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>2</param-value>
</init-param>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
改一下servlet-class标签中的内容就可以！
真的可以，一劳用yi！
具体编码的理论就不说了，google上已经够多了。
另外，如果不用struts的话，hibernate也可能碰到中文乱码问题，只要在hibernate.cfg.xml配置中如下：
<property name="hibernate.connection.url">
jdbc:microsoft:sqlserver://Localhost:1433;SelectMethod=cursor;characterEncoding=GBK;DatabaseName=myDatabase.
</property>
characterEncoding=GBK！就可以了。