(java 基础知识) Zip解压与压缩(java.util.zip)

落日映苍穹つ 2023-10-10 11:49 16阅读 0赞

下面的分别是写和读zip文件，其中写是递归的，功能完备了。读只是读根目录的，缺少递归。

而且没有涉及中文问题：

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1.  import java.io.\*;
2.  import java.util.zip.\*;
3.  
4.  public class Zip \{
5.  static final int BUFFER = 2048;
6.  static boolean flag = false;
7.  
8.  public static void main(String args\[\])throws IOException\{
9.  File file= new File("D:/Temp");
10. ZipSubdirectory(file);
11. FileInputStream file1 = new FileInputStream(ZipSubdirectory(file));
12. System.out.println(file1.toString());
13. \}
14. //ZipSubdirectory函数将一个指定目录（包括它子目录）压缩成一个同名压缩文件(这里称为"ORIGIN") 
15. public static File ZipSubdirectory(File myDir)throws IOException\{
16. //创建缓冲输入流BufferedInputStream 
17. BufferedInputStream origin = null;
18. //创建ZipOutputStream对象，将向它传递希望写入文件的输出流 
19. File zipFile=new File("D:/"\+myDir.getName()+".zip");
20. FileOutputStream fos=new FileOutputStream(zipFile);
21. ZipOutputStream out=new ZipOutputStream(new BufferedOutputStream(fos,BUFFER));
22. //dirContents\[\]获取当前目录(myDir)所有文件对象（包括子目录名) 
23. File dirContents\[\]=myDir.listFiles();
24. //创建临时文件tempFile,使用后删除 
25. File tempFile=null;
26. try\{
27. //处理当前目录所有文件对象，包括子目录 
28. for(int i=0;i < dirContents.length; i++)\{
29. //使用递归方法将当前目录的子目录转成一个ZIP文件，并作为一个ENTRY加进"ORIGIN" 
30. if(dirContents\[i\].isDirectory())\{
31. tempFile = ZipSubdirectory(dirContents\[i\]);
32. flag=true;
33. \}
34. //如果当前文件不是子目录 
35. else \{
36. tempFile=dirContents\[i\];
37. //flag标记tempFile是否由子目录压缩成的ZIP文件 
38. flag = false;
39. \}
40. System.out.println("Compress file: "\+tempFile.getName());
41. FileInputStream fis = new FileInputStream(tempFile);
42. origin = new BufferedInputStream(fis,BUFFER);
43. //为被读取的文件创建压缩条目 
44. ZipEntry entry = new ZipEntry(tempFile.getName());
45. byte data\[\]= new byte\[BUFFER\];
46. int count;
47. //在向ZIP输出流写入数据之前，必须首先使用out.putNextEntry(entry); 方法安置压缩条目对象 
48. out.putNextEntry(entry);
49. //向ZIP 文件写入数据 
50. while((count=origin.read(data,0,BUFFER))!=-1)\{
51. out.write(data,0,count);
52. \}
53. //tempFile是临时生成的ZIP文件,删除它 
54. if(flag==true)\{
55. flag = tempFile.delete();
56. System.out.println("Delete file:"\+tempFile.getName()+flag);
57. \}
58. //关闭输入流 
59. origin.close();
60. \}
61. out.close();
62. \} catch(Exception e)\{
63. System.out.println(e);
64. \}
65. //递归返回 
66. return zipFile;
67. \}
68. \}

import java.io.\*; import java.util.zip.\*; public class Zip \{ static final int BUFFER = 2048; static boolean flag = false; public static void main(String args\[\])throws IOException\{ File file= new File("D:/Temp"); ZipSubdirectory(file); FileInputStream file1 = new FileInputStream(ZipSubdirectory(file)); System.out.println(file1.toString()); \} //ZipSubdirectory函数将一个指定目录（包括它子目录）压缩成一个同名压缩文件(这里称为"ORIGIN") public static File ZipSubdirectory(File myDir)throws IOException\{ //创建缓冲输入流BufferedInputStream BufferedInputStream origin = null; //创建ZipOutputStream对象，将向它传递希望写入文件的输出流 File zipFile=new File("D:/"+myDir.getName()+".zip"); FileOutputStream fos=new FileOutputStream(zipFile); ZipOutputStream out=new ZipOutputStream(new BufferedOutputStream(fos,BUFFER)); //dirContents\[\]获取当前目录(myDir)所有文件对象（包括子目录名) File dirContents\[\]=myDir.listFiles(); //创建临时文件tempFile,使用后删除 File tempFile=null; try\{ //处理当前目录所有文件对象，包括子目录 for(int i=0;i < dirContents.length; i++)\{ //使用递归方法将当前目录的子目录转成一个ZIP文件，并作为一个ENTRY加进"ORIGIN" if(dirContents\[i\].isDirectory())\{ tempFile = ZipSubdirectory(dirContents\[i\]); flag=true; \} //如果当前文件不是子目录 else \{ tempFile=dirContents\[i\]; //flag标记tempFile是否由子目录压缩成的ZIP文件 flag = false; \} System.out.println("Compress file: "+tempFile.getName()); FileInputStream fis = new FileInputStream(tempFile); origin = new BufferedInputStream(fis,BUFFER); //为被读取的文件创建压缩条目 ZipEntry entry = new ZipEntry(tempFile.getName()); byte data\[\]= new byte\[BUFFER\]; int count; //在向ZIP输出流写入数据之前，必须首先使用out.putNextEntry(entry); 方法安置压缩条目对象 out.putNextEntry(entry); //向ZIP 文件写入数据 while((count=origin.read(data,0,BUFFER))!=-1)\{ out.write(data,0,count); \} //tempFile是临时生成的ZIP文件,删除它 if(flag==true)\{ flag = tempFile.delete(); System.out.println("Delete file:"+tempFile.getName()+flag); \} //关闭输入流 origin.close(); \} out.close(); \} catch(Exception e)\{ System.out.println(e); \} //递归返回 return zipFile; \} \}

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1.  import java.io.BufferedInputStream;
2.  import java.io.BufferedOutputStream;
3.  
4.  import java.io.FileInputStream;
5.  import java.io.FileOutputStream;
6.  
7.  import java.util.zip.ZipEntry;
8.  import java.util.zip.ZipInputStream;
9.  import java.util.zip.ZipOutputStream;
10. 
11. public class Test \{
12. 
13. 
14. public static void main(String\[\] args) \{
15. readFileAndWriteZip();
16. unZipFile();
17. \}
18. 
19. public static void unZipFile() \{
20. try\{
21. int BUFFER = 1024;
22. BufferedOutputStream dest = null;
23. FileInputStream fis = new FileInputStream("D:/Temp.zip");
24. ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
25. ZipEntry entry;
26. while ((entry = zis.getNextEntry()) != null) \{
27. System.out.println("Extracting: " \+ entry);
28. int count;
29. byte data\[\] = new byte\[1024\];
30. FileOutputStream fos = new FileOutputStream("D:/"\+entry.getName());
31. dest = new BufferedOutputStream(fos, BUFFER);
32. while ((count = zis.read(data, 0, BUFFER)) != -1) \{
33. dest.write(data, 0, count);
34. \}
35. dest.flush();
36. dest.close();
37. \}
38. zis.close();
39. \} catch (Exception e) \{
40. e.printStackTrace();
41. \}
42. 
43. \}
44. 
45. public static void readFileAndWriteZip() \{
46. 
47. try \{
48. 
49. \} catch (Exception ex)\{
50. System.err.println(ex.toString());
51. \}
52. \}
53. 
54. 
55. 
56. \}

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; public class Test \{ public static void main(String\[\] args) \{ readFileAndWriteZip(); unZipFile(); \} public static void unZipFile() \{ try\{ int BUFFER = 1024; BufferedOutputStream dest = null; FileInputStream fis = new FileInputStream("D:/Temp.zip"); ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis)); ZipEntry entry; while ((entry = zis.getNextEntry()) != null) \{ System.out.println("Extracting: " + entry); int count; byte data\[\] = new byte\[1024\]; FileOutputStream fos = new FileOutputStream("D:/"+entry.getName()); dest = new BufferedOutputStream(fos, BUFFER); while ((count = zis.read(data, 0, BUFFER)) != -1) \{ dest.write(data, 0, count); \} dest.flush(); dest.close(); \} zis.close(); \} catch (Exception e) \{ e.printStackTrace(); \} \} public static void readFileAndWriteZip() \{ try \{ \} catch (Exception ex)\{ System.err.println(ex.toString()); \} \} \}

测试通过的。

[view plain]: http://blog.csdn.net/longronglin/article/details/3879100#