下载的文件有中文名

原因：服务器获取到文件中文名后，浏览器不知使用那种方式进行解码

解决办法：

 String agent = request.getHeader("user-agent");
       
 filename = DownLoadUtils.getFileName(agent, filename);

 response.setHeader("contentdisposition","attachment;filename="+filename);

DownLoadUtils.java

package cn.wei.utils;

import sun.misc.BASE64Encoder;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;


public class DownLoadUtils {

    public static String getFileName(String agent, String filename) throws UnsupportedEncodingException {
        if (agent.contains("MSIE")) {
            // IE浏览器
            filename = URLEncoder.encode(filename, "utf-8");
            filename = filename.replace("+", " ");
        } else if (agent.contains("Firefox")) {
            // 火狐浏览器
            BASE64Encoder base64Encoder = new BASE64Encoder();
            filename = "=?utf-8?B?" + base64Encoder.encode(filename.getBytes("utf-8")) + "?=";
        } else {
            // 其它浏览器
            filename = URLEncoder.encode(filename, "utf-8");
        }
        return filename;
    }
}