package com.lx.product.seal.utils;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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/**
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* 压缩算法类
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* 实现文件压缩，文件夹压缩，以及文件和文件夹的混合压缩
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*
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*
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*/
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public class ZipUtil {
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/**
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* 完成的结果文件--输出的压缩文件
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*/
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File targetFile;
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public ZipUtil() {}
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public ZipUtil(File target) {
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targetFile = target;
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if (targetFile.exists())
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targetFile.delete();
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}
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/**
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* 压缩文件
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*
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* @param srcfile
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*/
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public void zipFiles(File srcfile) {
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ZipOutputStream out = null;
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try {
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out = new ZipOutputStream(new FileOutputStream(targetFile));
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if(srcfile.isFile()){
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zipFile(srcfile, out, "");
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} else{
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File[] list = srcfile.listFiles();
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for (int i = 0; list != null && i < list.length; i++) {
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compress(list[i], out, "");
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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if (out != null)
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out.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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/**
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* 压缩文件夹里的文件
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* 起初不知道是文件还是文件夹--- 统一调用该方法
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* @param file
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* @param out
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* @param basedir
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*/
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private void compress(File file, ZipOutputStream out, String basedir) {
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/* 判断是目录还是文件 */
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if (file.isDirectory()) {
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this.zipDirectory(file, out, basedir);
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} else {
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this.zipFile(file, out, basedir);
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}
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}
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/**
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* 压缩单个文件
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*
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* @param srcfile
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*/
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public void zipFile(File srcfile, ZipOutputStream out, String basedir) {
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if (!srcfile.exists())
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return;
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byte[] buf = new byte[1024];
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FileInputStream in = null;
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try {
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int len;
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in = new FileInputStream(srcfile);
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out.putNextEntry(new ZipEntry(basedir + srcfile.getName()));
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while ((len = in.read(buf)) > 0) {
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out.write(buf, 0, len);
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}
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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if (out != null)
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out.closeEntry();
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if (in != null)
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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/**
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* 压缩文件夹
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* @param dir
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* @param out
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* @param basedir
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*/
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public void zipDirectory(File dir, ZipOutputStream out, String basedir) {
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if (!dir.exists())
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return;
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File[] files = dir.listFiles();
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for (int i = 0; i < files.length; i++) {
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/* 递归 */
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compress(files[i], out, basedir + dir.getName() + "/");
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}
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}
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//测试
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public static void main(String[] args) {
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File f = new File("D:\\FENEW");
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new ZipUtil(new File( "D:/",f.getName()+".zip")).zipFiles(f);
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}
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}
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