Struts 2.18文件下载 Ie6下出错解决办法

package com.company.action;import java.io.InputStream;import java.io.UnsupportedEncodingException;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;import org.apache.struts2.convention.annotation.Result;import org.apache.struts2.convention.annotation.Results;import com.opensymphony.xwork2.Action;@Results( { @Result(name = "success", type = "stream", params = {        "contentType", "application/x-msdownload", "inputName", "inputStream",        "contentDisposition", "attachment;filename=%{url}", "bufferSize",        "5120" }) })public class DownAction implements Action {    // 文件地址    private String url;    public InputStream getInputStream() throws Exception {        InputStream inputStream = ServletActionContext.getServletContext()                .getResourceAsStream(url);        return inputStream;    }    /****     * 默认执行下载文件     */    public String execute() throws Exception {        return SUCCESS;    }    public String getUrl() {        return url;    }    public void setUrl(String url) {        // 进行中文转码        try {            url = new String(ServletActionContext.getRequest().getParameter(                    "url").getBytes("iso-8859-1"), "UTF-8");        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        this.url = url;    }}