java 生成及下载zip文件

1.生成zip文件

public boolean createCardImgZip(String sourcePath, String zipName) {
		// TODO Auto-generated method stub
		boolean result = false;
		String zipPath = "D:/test/";
		File sourceFile = new File(sourcePath);
		FileInputStream fis = null;
		BufferedInputStream bis = null;
		FileOutputStream fos = null;
		ZipOutputStream zos = null;

		if (sourceFile.exists() == false) {
			System.out.println("File catalog:" + sourcePath + "not exist!");
		} else {
			try {
				if(!new File(zipPath).exists()){
					new File(zipPath).mkdirs();
				}
				File zipFile = new File(zipPath + "/" + zipName + ".zip");
				if (zipFile.exists()) {
					System.out.println(zipPath + "Catalog File: " + zipName + ".zip" + "pack file.");
				} else {
					File[] sourceFiles = sourceFile.listFiles();
					if (null == sourceFiles || sourceFiles.length < 1) {
						System.out.println("File Catalog:" + sourcePath + "nothing in there,don't hava to compress!");
					} else {
						fos = new FileOutputStream(zipFile);
						zos = new ZipOutputStream(new BufferedOutputStream(fos));
						byte[] bufs = new byte[1024 * 10];
						for (int i = 0; i < sourceFiles.length; i++) {
							// create .zip and put pictures in
							ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());
							zos.putNextEntry(zipEntry);
							// read documents and put them in the zip
							fis = new FileInputStream(sourceFiles[i]);
							bis = new BufferedInputStream(fis, 1024 * 10);
							int read = 0;
							while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
								zos.write(bufs, 0, read);
							}
						}
						result = true;
					}
				}
			} catch (FileNotFoundException e) {
				e.printStackTrace();
				throw new RuntimeException(e);
			} catch (IOException e) {
				e.printStackTrace();
				throw new RuntimeException(e);
			} finally {
				try {
					if (null != bis)
						bis.close();
					if (null != zos)
						zos.close();
				} catch (IOException e) {
					e.printStackTrace();
					throw new RuntimeException(e);
				}
			}
		}
		return result;
	}

2.下载zip文件

public String downLoadZip() {
		String fileName = "test.zip";
		String path = "D:\\test\\test.zip";
		try {
			HttpServletResponse response = ServletActionContext.getResponse();
			File file = new File(path);
			response.setCharacterEncoding("UTF-8");
			response.setHeader("Content-Disposition",
					"attachment; filename=" + new String(fileName.getBytes("ISO8859-1"), "UTF-8"));
			response.setContentLength((int) file.length());
			response.setContentType("application/zip");// 定义输出类型
			FileInputStream fis = new FileInputStream(file);
			BufferedInputStream buff = new BufferedInputStream(fis);
			byte[] b = new byte[1024];// 相当于我们的缓存
			long k = 0;// 该值用于计算当前实际下载了多少字节
			OutputStream myout = response.getOutputStream();// 从response对象中得到输出流,准备下载
			// 开始循环下载
			while (k < file.length()) {
				int j = buff.read(b, 0, 1024);
				k += j;
				myout.write(b, 0, j);
			}
			myout.flush();
			buff.close();
			file.delete();
		} catch (Exception e) {
			System.out.println(e);
		}
		return null;
	}