java文件压缩下载

	private HttpServletResponse response;


//下载
		String zipPath = basicPath + File.separator + proCode + ".zip";
		OutputStream out = null;
		InputStream inputStream = null;
		try {
			File file = new File(zipPath);
			out = response.getOutputStream();
			response.setContentType("application/x-msdownload");
			response.setHeader("Content-Disposition", "attachment;filename=" + new String(proCode.getBytes(), "ISO-8859-1"));
			ZipUtils.toZip(proCode, tempPath, new FileOutputStream(file), true);

			inputStream = new FileInputStream(file);
			byte b[] = new byte[1024];
			int n;
			while ((n = inputStream.read(b)) != -1) {
				out.write(b, 0, n);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			//关流
			if (null != out) {
				try {
					out.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			if (null != inputStream) {
				try {
					inputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		//删除临时文件
		ZipUtils.deleteFolder(new File(basicPath));

import java.io.*;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 文件压缩工具类
 */
public class ZipUtils {

	public static void copyFileStream(File source, File dest) throws IOException {
		InputStream is = null;
		OutputStream os = null;
		try {
			is = new FileInputStream(source);
			os = new FileOutputStream(dest);
			byte[] buffer = new byte[1024];
			int length;
			while ((length = is.read(buffer)) > 0) {
				os.write(buffer, 0, length);
			}
		} finally {
			is.close();
			os.close();
		}
	}

	private static final int  BUFFER_SIZE = 2 * 1024;

	/**
	 * 压缩成ZIP 方法1
	 * @param name		名称
	 * @param srcDir	压缩文件夹路径
	 * @param out		压缩文件输出流
	 * @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;
	 *                          false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
	 * @throws RuntimeException 压缩失败会抛出运行时异常
	 */

	public static void toZip(String name,String srcDir, OutputStream out, boolean KeepDirStructure)
	throws RuntimeException{
		long start = System.currentTimeMillis();
		ZipOutputStream zos = null ;
		try {
			zos = new ZipOutputStream(out);
			File sourceFile = new File(srcDir);
			compress(sourceFile,zos,name,KeepDirStructure);
			long end = System.currentTimeMillis();
			System.out.println("压缩完成，耗时：" + (end - start) +" ms");
		} catch (Exception e) {
			throw new RuntimeException("zip error from ZipUtils",e);
		}finally{
			if(zos != null){
				try {
					zos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	/**
	 * 压缩成ZIP 方法2
	 * @param srcFiles 需要压缩的文件列表
	 * @param out           压缩文件输出流
	 * @throws RuntimeException 压缩失败会抛出运行时异常
	 */
	public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {
		long start = System.currentTimeMillis();
		ZipOutputStream zos = null ;
		try {
			zos = new ZipOutputStream(out);
			for (File srcFile : srcFiles) {
				byte[] buf = new byte[BUFFER_SIZE];
				zos.putNextEntry(new ZipEntry(srcFile.getName()));
				int len;
				FileInputStream in = new FileInputStream(srcFile);
				while ((len = in.read(buf)) != -1){
					zos.write(buf, 0, len);
				}
				zos.closeEntry();
				in.close();
			}
			long end = System.currentTimeMillis();
			System.out.println("压缩完成，耗时：" + (end - start) +" ms");
		} catch (Exception e) {
			throw new RuntimeException("zip error from ZipUtils",e);
		}finally{
			if(zos != null){
				try {
					zos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	/**
	 * 递归压缩方法
	 * @param sourceFile 源文件
	 * @param zos        zip输出流
	 * @param name       压缩后的名称
	 * @param KeepDirStructure  是否保留原来的目录结构,true:保留目录结构;
	 *                          false:所有文件跑到压缩包根目录下(注意：不保留目录结构可能会出现同名文件,会压缩失败)
	 * @throws Exception
	 */
	private static void compress(File sourceFile, ZipOutputStream zos, String name,
								 boolean KeepDirStructure) throws Exception{
		byte[] buf = new byte[BUFFER_SIZE];
		if(sourceFile.isFile()){
			// 向zip输出流中添加一个zip实体，构造器中name为zip实体的文件的名字
			zos.putNextEntry(new ZipEntry(name));
			// copy文件到zip输出流中
			int len;
			FileInputStream in = new FileInputStream(sourceFile);
			while ((len = in.read(buf)) != -1){
				zos.write(buf, 0, len);
			}
			// Complete the entry
			zos.closeEntry();
			in.close();
		} else {
			File[] listFiles = sourceFile.listFiles();
			if (listFiles == null || listFiles.length == 0) {
				// 需要保留原来的文件结构时,需要对空文件夹进行处理
				if (KeepDirStructure) {
					// 空文件夹的处理
					zos.putNextEntry(new ZipEntry(name + "/"));
					// 没有文件，不需要文件的copy
					zos.closeEntry();
				}
			} else {
				for (File file : listFiles) {
					// 判断是否需要保留原来的文件结构
					if (KeepDirStructure) {
						// 注意：file.getName()前面需要带上父文件夹的名字加一斜杠,
						// 不然最后压缩包中就不能保留原来的文件结构,即：所有文件都跑到压缩包根目录下了
						compress(file, zos, name + "/" + file.getName(), KeepDirStructure);
					} else {
						compress(file, zos, file.getName(), KeepDirStructure);
					}
				}
			}
		}
	}

	/**
	 * 删除文件
	 *
	 * @param dir
	 * @return
	 */
	public static boolean deleteFolder (File dir){
		if (dir.isDirectory()) {
			String[] children = dir.list();
			for (int i = 0; i < children.length; i++) {
				boolean success = deleteFolder(new File(dir, children[i]));
				if (!success) {
					return false;
				}
			}
		}
		//删除空文件夹
		return dir.delete();
	}

}