Java建立Zip压缩文件的代码实例
Java代码
  1. import java.io.*;
  2. import java.util.zip.*;
  3. class Zip {
  4. public static void main(String args[]) throws IOException {
  5. byte b[] = new byte[512];
  6. ZipOutputStream zout = new ZipOutputStream(System.out);
  7. for(int i = 0; i < args.length; i ++) {
  8. InputStream in = new FileInputStream(args[i]);
  9. ZipEntry e = new ZipEntry(args[i].replace(File.separatorChar,'/'));
  10. zout.putNextEntry(e);
  11. int len=0;
  12. while((len=in.read(b)) != -1) {
  13. zout.write(b,0,len);
  14. }
  15. zout.closeEntry();
  16. print(e);
  17. }
  18. zout.close();
  19. }
  21. public static void print(ZipEntry e){
  22. PrintStream err = System.err;
  23. err.print("added " + e.getName());
  24. if (e.getMethod() == ZipEntry.DEFLATED) {
  25. long size = e.getSize();
  26. if (size > 0) {
  27. long csize = e.getCompressedSize();
  28. long ratio = ((size-csize)*100) / size;
  29. err.println(" (deflated " + ratio + "%)");
  30. }
  31. else {
  32. err.println(" (deflated 0%)");
  33. }
  34. }
  35. else {
  36. err.println(" (stored 0%)");
  37. }
  38. }
  39. }

压缩文件代码：
Java代码
  1. import java.io.*;
  2. import java.util.zip.*;//ZipOutputStream这个流在这里
  3. import java.util.*;
  5. public class ZipOutputStreamTest
  6. {
  7. public static void main(String[] args) throws Exception
  8. {
  9. File f = new File("a.jpg");
  10. FileInputStream fis = new FileInputStream(f);
  11. BufferedInputStream bis = new BufferedInputStream(fis);
  12. byte[] buf = new byte[1024];
  13. int len;
  14. FileOutputStream fos = new FileOutputStream(f.getName()+".zip");
  15. BufferedOutputStream bos = new BufferedOutputStream(fos);
  16. ZipOutputStream zos = new ZipOutputStream(bos);//压缩包
  17. ZipEntry ze = new ZipEntry(f.getName());//这是压缩包名里的文件名
  18. zos.putNextEntry(ze);//写入新的 ZIP 文件条目并将流定位到条目数据的开始处
  20. while((len=bis.read(buf))!=-1)
  21. {
  22. zos.write(buf,0,len);
  23. zos.flush();
  24. }
  25. bis.close();
  26. zos.close();
  27. }
  28. }

压缩文件夹代码：
Java代码
  1. import java.io.File;
  2. import org.apache.tools.zip.ZipOutputStream; //这个包在ant.jar里，要到官方网下载
  3. import java.io.FileInputStream;
  4. import java.io.FileOutputStream;
  5. import java.util.zip.ZipInputStream;
  6. import java.util.zip.ZipEntry;
  8. public class CompressBook {
  9. public CompressBook() {}
  11. /**//*
  12. * inputFileName 输入一个文件夹
  13. * zipFileName 输出一个压缩文件夹
  14. */
  15. public void zip(String inputFileName) throws Exception {
  16. String zipFileName = "c:\\test.zip"; //打包后文件名字
  17. System.out.println(zipFileName);
  18. zip(zipFileName, new File(inputFileName));
  19. }
  21. private void zip(String zipFileName, File inputFile) throws Exception {
  22. ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
  23. zip(out, inputFile, "");
  24. System.out.println("zip done");
  25. out.close();
  26. }
  28. private void zip(ZipOutputStream out, File f, String base) throws Exception {
  29. if (f.isDirectory()) {
  30. File[] fl = f.listFiles();
  31. out.putNextEntry(new org.apache.tools.zip.ZipEntry(base + "/"));
  32. base = base.length() == 0 ? "" : base + "/";
  33. for (int i = 0; i < fl.length; i++) {
  34. zip(out, fl[i], base + fl[i].getName());
  35. }
  36. }else {
  37. out.putNextEntry(new org.apache.tools.zip.ZipEntry(base));
  38. FileInputStream in = new FileInputStream(f);
  39. int b;
  40. System.out.println(base);
  41. while ( (b = in.read()) != -1) {
  42. out.write(b);
  43. }
  44. in.close();
  45. }
  46. }
  48. public static void main(String [] temp){
  49. CompressBook book = new CompressBook();
  50. try {
  51. book.zip("c:\\c");//你要压缩的文件夹
  52. }catch (Exception ex) {
  53. ex.printStackTrace();
  54. }
  55. }
  56. }