struts2 下载文件，下载弹出框，文件名中文乱码

Struts2 实现文件下载时，下载对话框出现中文乱码情况

解决方案：

public void setFileName(String fileName) throws UnsupportedEncodingException {
this.fileName = new String(fileName.getBytes("utf-8"), "ISO8859-1");
}

public String getFileName()throws
UnsupportedEncodingException {
return new String(fileName.getBytes("utf-8"), "ISO8859-1");
}
public void setFileName(String fileName) throws UnsupportedEncodingException {
this.fileName=URLEncoder.encode(fileName, "UTF-8");
if (fileName.length() > 150) {
String guessCharset ="utf-8";  /*根据request的locale 得出可能的编码，中文操作系统通常是gb2312*/
this.fileName = new String(fileName.getBytes(guessCharset), "IsSO8859-1");
}
//this.fileName = fileName;
}