代码如下:
package com.cn.util; import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.CRC32; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; import org.apache.tools.ant.Project; import org.apache.tools.ant.taskdefs.Expand; /** * 压缩文件工具类 * @author sun.kai * 2016年8月14日 */ public class ZipUtil { static final int BUFFER = 8192; private static File zipFile; /** * 压缩单个或多文件方法 * @param zipPath 压缩后的文件路径 * @param srcPathName 要压缩的文件路径 * 参数srcPathName也可以定义成数组形式,需调用方把参数封装到数组中传过来即可 */ public static void compress(String zipPath,String... srcPathName) { //压缩后的文件对象 zipFile = new File(zipPath); try { //创建写出流操作 FileOutputStream fileOutputStream = new FileOutputStream(zipFile); CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,new CRC32()); ZipOutputStream out = new ZipOutputStream(cos); for(String srcPath:srcPathName){ //创建需要压缩的文件对象 File file = new File(srcPath); if (!file.exists()){ throw new RuntimeException(srcPath + "不存在!"); } /* * (1)如果在zip压缩文件中不需要一级文件目录,定义String basedir = ""; * 下面的compress方法中当判断文件file是目录后不需要加上basedir = basedir + file.getName() + File.separator; * (2)如果只是想在压缩后的zip文件里包含一级文件目录,不包含二级以下目录, * 直接在这定义String basedir = file.getName() + File.separator; * 下面的compress方法中当判断文件file是目录后不需要加上basedir = basedir + file.getName() + File.separator; * (3)如果想压缩后的zip文件里包含一级文件目录,也包含二级以下目录,即zip文件里的目录结构和原文件一样 * 在此定义String basedir = ""; * 下面的compress方法中当判断文件file是目录后需要加上basedir = basedir + file.getName() + File.separator; */ //String basedir = file.getName() + File.separator; String basedir = ""; compress(file, out, basedir); } out.close(); } catch (Exception e) { throw new RuntimeException(e); } } private static void compress(File file, ZipOutputStream out, String basedir) { /* * 判断是目录还是文件 */ if (file.isDirectory()) { basedir += file.getName() + File.separator; compressDirectory(file, out, basedir); } else { System.out.println("压缩:" + basedir + file.getName()); compressFile(file, out, basedir); } } /** * 压缩一个目录 */ private static void compressDirectory(File dir, ZipOutputStream out, String basedir) { if (!dir.exists()){ return; } File[] files = dir.listFiles(); for (int i = 0; i < files.length; i++) { /* 递归 */ compress(files[i], out, basedir); } } /** * 压缩一个文件 */ private static void compressFile(File file, ZipOutputStream out, String basedir) { if (!file.exists()) { return; } try { BufferedInputStream bis = new BufferedInputStream( new FileInputStream(file)); //创建Zip实体,并添加进压缩包 ZipEntry entry = new ZipEntry(basedir + file.getName()); out.putNextEntry(entry); //读取待压缩的文件并写进压缩包里 int count; byte data[] = new byte[BUFFER]; while ((count = bis.read(data, 0, BUFFER)) != -1) { out.write(data, 0, count); } bis.close(); } catch (Exception e) { throw new RuntimeException(e); } } /** * 解压缩 * @param sourceFile 要解压缩的文件的路径 * @param destDir 解压缩后的目录路径 * @throws Exception */ public static void deCompress(String sourceFile,String destDir) throws Exception{ //创建需要解压缩的文件对象 File file = new File(sourceFile); if (!file.exists()){ throw new RuntimeException(sourceFile + "不存在!"); } //创建解压缩的文件目录对象 File destDiretory = new File(destDir); if(!destDiretory.exists()){ destDiretory.mkdirs(); } /* * 保证文件夹路径最后是"/"或者"" * charAt()返回指定索引位置的char值 */ char lastChar = destDir.charAt(destDir.length()-1); if(lastChar!='/'&&lastChar!='\'){ //在最后加上分隔符 destDir += File.separator; } unzip(sourceFile, destDir); } /** * 解压方法 * 需要ant.jar */ private static void unzip(String sourceZip,String destDir) throws Exception{ try{ Project p = new Project(); Expand e = new Expand(); e.setProject(p); e.setSrc(new File(sourceZip)); e.setOverwrite(false); e.setDest(new File(destDir)); e.execute(); }catch(Exception e){ throw e; } } }
测试代码:
package com.test.test; import com.cn.util.ZipUtil; public class TestZip { public static void main(String[] args) throws Exception { String srcPathName1 = "C:/Users/sun/Desktop/test1/"; String srcPathName2 = "C:/Users/sun/Desktop/test2/"; String zipPath1 = "C:/Users/sun/Desktop/test1.zip"; String zipPath = "C:/Users/sun/Desktop/test.zip"; ZipUtil.compress(zipPath1,srcPathName1); ZipUtil.compress(zipPath,srcPathName1,srcPathName2); String sourceFile = "C:/Users/sun/Desktop/test.zip"; String destDir = "C:/Users/sun/Desktop/test"; ZipUtil.deCompress(sourceFile, destDir); } }