用java实现zip压缩
今天写了个用java压缩的功能，可以实现对文件和目录的压缩。
由于java.util.zip.ZipOutputStream有中文乱码问题，所以采用org.apache.tools.zip.ZipOutputStream。
以下是代码：
Java代码
1. package net.szh.zip;
2.
3. import java.io.BufferedInputStream;
4. import java.io.File;
5. import java.io.FileInputStream;
6. import java.io.FileOutputStream;
7. import java.util.zip.CRC32;
8. import java.util.zip.CheckedOutputStream;
9.
10. import org.apache.tools.zip.ZipEntry;
11. import org.apache.tools.zip.ZipOutputStream;
12.
13. public class ZipCompressor {
14. static final int BUFFER = 8192;
15.
16. private File zipFile;
17.
18. public ZipCompressor(String pathName) {
19. zipFile = new File(pathName);
20. }
21.
22. public void compress(String srcPathName) {
23. File file = new File(srcPathName);
24. if (!file.exists())
25. throw new RuntimeException(srcPathName + "不存在！");
26. try {
27. FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
28. CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
29. new CRC32());
30. ZipOutputStream out = new ZipOutputStream(cos);
31. String basedir = "";
32. compress(file, out, basedir);
33. out.close();
34. } catch (Exception e) {
35. throw new RuntimeException(e);
36. }
37. }
38.
39. private void compress(File file, ZipOutputStream out, String basedir) {
40. /* 判断是目录还是文件 */
41. if (file.isDirectory()) {
42. System.out.println("压缩：" + basedir + file.getName());
43. this.compressDirectory(file, out, basedir);
44. } else {
45. System.out.println("压缩：" + basedir + file.getName());
46. this.compressFile(file, out, basedir);
47. }
48. }
49.
50. /** 压缩一个目录 */
51. private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
52. if (!dir.exists())
53. return;
54.
55. File[] files = dir.listFiles();
56. for (int i = 0; i < files.length; i++) {
57. /* 递归 */
58. compress(files[i], out, basedir + dir.getName() + "/");
59. }
60. }
61.
62. /** 压缩一个文件 */
63. private void compressFile(File file, ZipOutputStream out, String basedir) {
64. if (!file.exists()) {
65. return;
66. }
67. try {
68. BufferedInputStream bis = new BufferedInputStream(
69. new FileInputStream(file));
70. ZipEntry entry = new ZipEntry(basedir + file.getName());
71. out.putNextEntry(entry);
72. int count;
73. byte data[] = new byte[BUFFER];
74. while ((count = bis.read(data, 0, BUFFER)) != -1) {
75. out.write(data, 0, count);
76. }
77. bis.close();
78. } catch (Exception e) {
79. throw new RuntimeException(e);
80. }
81. }
82. }
后来发现原来可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现，更加简单。
Java代码
1. package net.szh.zip;
2.
3. import java.io.File;
4.
5. import org.apache.tools.ant.Project;
6. import org.apache.tools.ant.taskdefs.Zip;
7. import org.apache.tools.ant.types.FileSet;
8.
9. public class ZipCompressorByAnt {
10.
11. private File zipFile;
12.
13. public ZipCompressorByAnt(String pathName) {
14. zipFile = new File(pathName);
15. }
16.
17. public void compress(String srcPathName) {
18. File srcdir = new File(srcPathName);
19. if (!srcdir.exists())
20. throw new RuntimeException(srcPathName + "不存在！");
21.
22. Project prj = new Project();
23. Zip zip = new Zip();
24. zip.setProject(prj);
25. zip.setDestFile(zipFile);
26. FileSet fileSet = new FileSet();
27. fileSet.setProject(prj);
28. fileSet.setDir(srcdir);
29. //fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夹 eg:zip.setIncludes("*.java");
30. //fileSet.setExcludes(...); 排除哪些文件或文件夹
31. zip.addFileset(fileSet);
32.
33. zip.execute();
34. }
35. }
测试一下
Java代码
1. package net.szh.zip;
2.
3. public class TestZip {
4. public static void main(String[] args) {
5. ZipCompressor zc = new ZipCompressor("E:\\szhzip.zip");
6. zc.compress("E:\\test");
7.
8. ZipCompressorByAnt zca = new ZipCompressorByAnt("E:\\szhzipant.zip");
9. zca.compress("E:\\test");
10. }
11. }
转摘自: http://szhnet.iteye.com/blog/199059