Java 文件下载

FileDownloadUtils工具类:

package com.dzpykj.files.download;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

/**
 * 文件下载工具类
 * @author ChaiXY
 */
public class FileDownloadUtils {
    
    /**
     * 文件下载
     * @param path 文件全路径
     * @return 是否下载成功
     */
    public static boolean downloadFiles(String path, HttpServletResponse response) throws IOException {
        boolean success = false;
        // path是指欲下载的文件的路径。
        File file = new File(path);
        // 取得文件名。
        String filename = file.getName();
        // 取得文件的后缀名。
        String fileSuffixName = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
        
        // 以流的形式下载文件。
        InputStream fis = new BufferedInputStream(new FileInputStream(path));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        // 清空response
        response.reset();
        // 设置response的Header
        //response.addHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(filename,"UTF-8"));
        response.addHeader("Content-Disposition", "attachment;filename="+new String(filename.getBytes(), "ISO-8859-1"));
        response.addHeader("Content-Length", "" + file.length());
        OutputStream os = new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/octet-stream");
        //response.setContentType("application/octet-stream;charset=UTF-8");
        // response.setContentType("application/" +fileSuffixName + ";charset = UTF-8"); //设置字符集和文件后缀名
        os.write(buffer);
        os.flush();
        os.close();
        success = true;
        return success;
    }
}