java.util.zip
主要是三个类：ZipOutputStream 压缩文件使用
ZipInputStream 解压缩文件使用
ZipFile 循环压缩文件使用，也可以获得文件的数目
1.将多个文件压缩到成一个文件夹
String[] fileNames = {"tt.txt","haha.txt"}; ZipOutputStream zos = new ZipOutputStream(new FileOutputStream("tomorrow.zip")); byte[] buff = new byte; for(int i = 0;i < fileNames.length ; i++) { FileInputStream is = new FileInputStream(fileNames); zos.putNextEntry(new ZipEntry(fileNames)); //最关键的是这一步 int len = 0; while ((len = is.read(buff)) > 0 ) { zos.write(buff, 0, len); } zos.closeEntry(); //需要注意的是这个地方 is.close(); } zos.close();
2.罗列某个压缩文件中所有的文件名称
ZipFile zf= new ZipFile(new File("tomorrow.zip")); for(Enumeration<ZipEntry> entrys = (Enumeration<ZipEntry>)zf.entries() ; entrys.hasMoreElements();) { String zipEnteyName = entrys.nextElement().getName(); System.out.println(zipEnteyName); }
3. 解压缩ZIP文件
//获得输入流
ZipInputStream ziStream = new ZipInputStream(new FileInputStream("tomorrow.zip")); //主要是为了循环使用 ZipFile zFile = new ZipFile(new File("tomorrow.zip")); for (Enumeration<ZipEntry> entries = (Enumeration<ZipEntry>)zFile.entries();entries.hasMoreElements();) { ZipEntry entry = ziStream.getNextEntry(); if ( null == entry) { break; } String name = entry.getName(); System.out.println(name); FileOutputStream os = new FileOutputStream(name); int len = 0; byte[] buff = new byte; while ((len = ziStream.read(buff)) > 0) { os.write(buff, 0, len); } ziStream.closeEntry(); os.close(); } ziStream.close();
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