编码转化了，还是乱码,大家帮帮忙，在线等待!

jsp页面里传过去一个值例如:<html:link page="/XmList.do?xmLx=基建项目库">,在控制台输出request编码是gb2312,但是得到的值还是乱码,为什么?

大家帮帮忙,小弟谢过了~~~很郁闷~
相关文件如下(编译成功):

filter文件:
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package 包;

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 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 {

if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
System.out.println("filter2 is doing !");
System.out.println("encoding:"+encoding);
System.out.println("ignore:"+ignore);
request.setCharacterEncoding(encoding);

}

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);

}


}

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web.xml文件:
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<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>包</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>
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action文件:
--------------------------------------------------------
package 包.Actions;

import org.apache.struts.action.*;
import javax.servlet.http.*;
import 包.GetXmList;
import 包.PageForm;

public class XmListAction extends Action
{
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
{
PageForm f = (PageForm)form;


//Get the parameter from Form
String xmLx = f.getXmLx();

//调试
System.out.println("request CharacterEncoding :" + request.getCharacterEncoding());
System.out.println("response CharacterEncoding :" + response.getCharacterEncoding());
System.out.println("xmLx in action is:" + xmLx);
//调试结束


int countPerPage = f.getCountPerPage();
int page = f.getPage();

if(page <= 0 ) f.setPage(1);

GetXmList gal = new GetXmList();

if(xmLx == null || xmLx.equals("") || xmLx.equals("*"))
{
gal.getList("*",countPerPage,page);
}
else
{
gal.getList(xmLx,countPerPage,page);
}

if(page > gal.getPageTotal())
{
f.setPage(gal.getPageTotal());
}

request.setAttribute("coll",gal.getColl());
request.setAttribute("xmTotal",String.valueOf(gal.getXmTotal()));
request.setAttribute("pageTotal",String.valueOf(gal.getPageTotal()));
request.setAttribute("page",String.valueOf(gal.getPage())); //获得当前页
request.setAttribute("pageForm",f);
return mapping.findForward("showXmList");

}
}
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PageForm文件:
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package 包.FormBeans;

import javax.servlet.http.*;

import org.apache.struts.action.*;
import java.util.HashMap;

public class PageForm
extends ActionForm
{
private String xmLx = "*";
private int countPerPage = 20;
private int page = 1;

private HashMap nextLinkMap = new HashMap(); //该变量用于存放上下页链接所用的Map，下一页
private HashMap lastLinkMap = new HashMap(); //该变量用于存放上下页链接所用的Map，上一页

//上一页
public HashMap getLastLinkMap()
{
this.lastLinkMap.put("xmLx",this.xmLx);
this.lastLinkMap.put("page",String.valueOf(this.page-1));
return this.lastLinkMap;
}

//下一页
public HashMap getNextLinkMap()
{
this.nextLinkMap.put("xmLx",this.xmLx);
this.nextLinkMap.put("page",String.valueOf(this.page+1));
return this.nextLinkMap;
}

public String getXmLx()
{
return xmLx;
}

public void setXmLx(String xmLx)
{
this.xmLx = xmLx;
}

public int getCountPerPage()
{
return countPerPage;
}

public void setCountPerPage(int countPerPage)
{
this.countPerPage = countPerPage;
}

public int getPage()
{
return page;
}

public void setPage(int page)
{
this.page = page;
}

public ActionErrors validate(ActionMapping actionMapping,
HttpServletRequest httpServletRequest)
{
/**@todo: finish this method, this is just the skeleton.*/
return null;
}

public void reset(ActionMapping actionMapping,
HttpServletRequest httpServletRequest)
{
xmLx = "*";
countPerPage = 20;
page = 1;
}
}
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