根据多个网络url打压缩包并触发浏览器的下载功能---java

通过多个网络的url打包为.zip文件并触发浏览器的下载功能
阿里oss存储的连接也可以

控制层代码

	
	/**
	 * *  批量下载讲义
	 * @return
	 * @author jiejing
	 */
	@ResponseBody
	@RequestMapping("/toDowmNoteBygid")
	public void toDowmNoteBygid(List<Notes> nlist, HttpServletRequest request,HttpServletResponse response, PrintWriter pw) {
		String gname="打包后要保存的文件名";
		// 响应头的设置
		response.reset();
		response.setCharacterEncoding("utf-8");
		response.setContentType("multipart/form-data");

		// 设置压缩包的名字
		// 解决不同浏览器压缩包名字含有中文时乱码的问题
		String downloadName = gname+".zip";
		String agent = request.getHeader("USER-AGENT");
		try {
			if (agent.contains("MSIE") || agent.contains("Trident")) {
				downloadName = java.net.URLEncoder.encode(downloadName, "UTF-8");
			} else {
				downloadName = new String(downloadName.getBytes("UTF-8"), "ISO-8859-1");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		response.setHeader("Content-Disposition", "attachment;fileName=\"" + downloadName + "\"");

		// 设置压缩流：直接写入response，实现边压缩边下载
		ZipOutputStream zipos = null;
		try {
			zipos = new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));
			zipos.setMethod(ZipOutputStream.DEFLATED); // 设置压缩方法
		} catch (Exception e) {
			e.printStackTrace();
		}

		// 循环将文件写入压缩流
		DataOutputStream os = null;
		int t =0;
		for (Notes notes : urls) {
			t=t+1;
			//String fileName = getFileTypeByUrl(notes.getNotesUrl());//通过连接获取文件类型 文件名没有文件类型后缀时偶这个方法
			// 这里，加上t是防止要下载的文件有重名的导致下载失败
			String fileName=t+notes.getNotesName();
			File file = UrlFilesToZip.getFileByUrl(notes.getNotesUrl(), fileName);
			try {
				// 添加ZipEntry，并ZipEntry中写入文件流
				zipos.putNextEntry(new ZipEntry(fileName));
				os = new DataOutputStream(zipos);
				InputStream is = new FileInputStream(file);
				byte[] b = new byte[100];
				int length = 0;
				while ((length = is.read(b)) != -1) {
					os.write(b, 0, length);
				}
				is.close();
				zipos.closeEntry();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		// 关闭流
		try {
			os.flush();
			os.close();
			zipos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}		
	}
	

压缩文件代码工具类：

package com.csdn.utils;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;


public class UrlFilesToZip {
	private static final Logger logger = LoggerFactory.getLogger(UrlFilesToZip.class);
	

	//url转file
	public static File getFileByUrl(String fileUrl, String suffix) {
		ByteArrayOutputStream outStream = new ByteArrayOutputStream();
		BufferedOutputStream stream = null;
		InputStream inputStream = null;
		File file = null;
		try {
			URL imageUrl = new URL(fileUrl);
			HttpURLConnection conn = (HttpURLConnection) imageUrl.openConnection();
			conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
			inputStream = conn.getInputStream();
			byte[] buffer = new byte[1024];
			int len = 0;
			while ((len = inputStream.read(buffer)) != -1) {
				outStream.write(buffer, 0, len);
			}
			file = File.createTempFile("file", suffix);
			FileOutputStream fileOutputStream = new FileOutputStream(file);
			stream = new BufferedOutputStream(fileOutputStream);
			stream.write(outStream.toByteArray());
		} catch (Exception e) {
		} finally {
			try {
				if (inputStream != null)
					inputStream.close();
				if (stream != null)
					stream.close();
				outStream.close();
			} catch (Exception e) {
			}
		}
		return file;
	}

	//根据获取文件后缀
	private String getFileTypeByUrl(String url) {
		
		String suffixes = "3fr|arw|bmp|cr2|crw|dcr|dng|eps|erf|gif|icns|ico|jpeg|jpg|mos|mrw|nef|odd|orf|pdf|pef|png|ppm|ps|psd|raf|raw|svg|svgz|tif|tiff|webp|x3f|xcf|xps|		7z|ace|alz|arc|arj|bz|bz2|cab|cpio|deb|dmg|eml|gz|img|iso|jar|lha|lz|lzma|lzo|rar|rpm|rz|tar|tar.7z|tar.bz|tar.bz2|tar.gz|tar.lzo|tar.xz|tar.Z|tbz|tbz2|tgz|tZ|tzo|xz|z|zip|aac|ac3|aif|aifc|aiff|amr|caf|flac|m4a|m4b|mp3|oga|ogg|sf2|sfark|voc|wav|weba|wma|		3g2|3gp|3gpp|avi|cavs|dv|dvr|flv|gif|m2ts|m4v|mkv|mod|mov|mp4|mpeg|mpg|mts|mxf|ogg|rm|rmvb|swf|ts|vob|webm|wmv|wtv|		abw|djvu|doc|docm|docx|html|lwp|md|odt|pages|pages.zip|pdf|rst|rtf|sdw|tex|txt|wpd|wps|zabw|eps|html|key|key.zip|odp|pdf|pps|ppsx|ppt|pptm|pptx|ps|sda|swf|		csv|html|numbers|numbers.zip|ods|pdf|sdc|xls|xlsm|xlsx|azw|azw3|azw4|cbc|cbr|cbz|chm|docx|epub|fb2|htm|html|htmlz|lit|lrf|mobi|odt|oeb|pdb|pdf|pml|prc|rb|rtf|snb|tcr|txt|txtz|eot|otf|ttf|woff|dwg|dxf|ai|cdr|cgm|emf|eps|pdf|ps|sk|sk1|svg|svgz|vsd|wmf|website";
		Pattern pat = Pattern.compile("[\\w]+[\\.](" + suffixes + ")");// 正则判断
		Matcher mc = pat.matcher(url);// 条件匹配
		String substring = "";
		while (mc.find()) {
			substring = mc.group();// 截取文件名后缀名
		}
		return substring;
	}
}