下载的工具类完成
package com.geotmt.billingcenter.common.utils;import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;/*** @Description 文件下载类* @Author yanghanwei* @Mail yanghanwei@geotmt.com* @Date 10:31 2019-11-21* @Version v1**/
public class DownFileUtils {/*** 以流的方式下载* @param path* @param response*/public static void download(String path, HttpServletResponse response) {try {// 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();// 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responseresponse.reset();// 设置response的Headerresponse.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));response.addHeader("Content-Length", "" + file.length());OutputStream toClient = new BufferedOutputStream(response.getOutputStream());response.setContentType("multipart/form-data");toClient.write(buffer);toClient.flush();toClient.close();} catch (IOException ex) {ex.printStackTrace();}}/*** 下载本地文件* @param response* @throws FileNotFoundException*/public static void download(String fullPath, String fileName, HttpServletResponse response) throws FileNotFoundException {// 下载本地文件// 读到流中(文件的存放路径)InputStream inStream = new FileInputStream(fullPath);// 设置输出的格式response.reset();response.setContentType("bin");response.addHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");// 循环取出流中的数据byte[] b = new byte[100];int len;try {while ((len = inStream.read(b)) > 0) {response.getOutputStream().write(b, 0, len);}inStream.close();} catch (IOException e) {e.printStackTrace();}}/*** 下载网络文件* @param Url* @throws MalformedURLException*/public static void download(String Url) throws MalformedURLException {// 下载网络文件int bytesum = 0;int byteread = 0;URL url = new URL(Url);try {URLConnection conn = url.openConnection();InputStream inStream = conn.getInputStream();FileOutputStream fs = new FileOutputStream("c:/abc.gif");byte[] buffer = new byte[1204];while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread;System.out.println(bytesum);fs.write(buffer, 0, byteread);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/*** 支持在线打开的方式* @param filePath* @param response* @param isOnLine*/public static void download(String filePath, HttpServletResponse response, boolean isOnLine) {try{File f = new File(filePath);if (!f.exists()) {response.sendError(404, "File not found!");return;}BufferedInputStream br = new BufferedInputStream(new FileInputStream(f));byte[] buf = new byte[1024];int len = 0;// 非常重要response.reset();if (isOnLine) {// 在线打开方式URL u = new URL("file:///" + filePath);response.setContentType(u.openConnection().getContentType());response.setHeader("Content-Disposition", "inline; filename=" + f.getName());// 文件名应该编码成UTF-8} else {// 纯下载方式response.setContentType("application/x-msdownload");response.setHeader("Content-Disposition", "attachment; filename=" + f.getName());}OutputStream out = response.getOutputStream();while ((len = br.read(buf)) > 0){out.write(buf, 0, len);}br.close();out.close();} catch (Exception e) {e.printStackTrace();}}
}
简单使用
public void exportConsumeByMonthAndCust(String month, HttpServletResponse response) throws Exception{// 下载 zip 文件String outPath = "/data/app/aaa.zip";DownFileUtils.download(outPath, response);logger.info("============ 下载成功！=============");}}