Java压缩文件

一时失言乱红尘 2022-08-12 11:59 244阅读 0赞

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 org.apache.tools.zip.ZipEntry;  
import org.apache.tools.zip.ZipOutputStream;  
   
public class ll \{    
    static final int BUFFER = 8192;    
    private File zipFile;    
    public ll(String pathName) \{    
        zipFile = new File(pathName);    
    \}    
   
/\*\*  
  \* 压缩文件  
  \* @param srcPathName  
  \*/  
public void compress(String srcPathName) \{  
  File file = new File(srcPathName);  
  if (!file.exists())  
       throw new RuntimeException(srcPathName + "不存在！");  
  try \{  
   FileOutputStream fileOutputStream = new FileOutputStream(zipFile);  
   CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,new CRC32());  
   ZipOutputStream out = new ZipOutputStream(cos);  
   out.setEncoding("gbk");  
   String basedir = "";  
   compress(file, out, basedir);  
   out.close();  
  \} catch (Exception e) \{  
      throw new RuntimeException(e);  
  \}  
\}  
   
     private void compress(File file, ZipOutputStream out, String basedir) \{    
        /\* 判断是目录还是文件 \*/   
        if (file.isDirectory()) \{    
            this.compressDirectory(file, out, basedir);    
        \} else \{    
            this.compressFile(file, out, basedir);    
        \}    
     \}    
   
    /\*\* 压缩一个目录 \*/   
    private void compressDirectory(File dir, ZipOutputStream out, String basedir) \{    
    if (!dir.exists())    
        return;    
    File\[\] files = dir.listFiles();    
    System.out.println(files.length+"--");  
    for (int i = 0; i <files.length; i++) \{  
        compress(files\[i\], out, basedir + dir.getName() + "/");  
    \}    
    \}  
  
    /\*\* 压缩一个文件 \*/  
private void compressFile(File file, ZipOutputStream out, String basedir) \{  
  if (!file.exists()) \{  
     return;  
  \}  
  try \{  
   BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));  
   ZipEntry entry = new ZipEntry(basedir + file.getName());  
   out.putNextEntry(entry);  
   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);  
  \}  
\}  
  
  private static  String getName(String filename)\{  
  if ((filename != null) && (filename.length() > 0)) \{  
  int q=filename.lastIndexOf("\\\\");  
  System.out.println(q);  
  if(filename.contains("."))\{  
  int dot = filename.lastIndexOf('.');  
  if ((dot > -1) && (dot < (filename.length() - 1))&&q>-1&&(q < (filename.length() - 1))) \{  
      return filename.substring(q+1,dot);  
  \}  
  \}else\{  
  if (q>-1&&(q < (filename.length() - 1))) \{  
      return filename.substring(q + 1);  
  \}  
  \}  
  \}  
   
return filename;  
  
\}  
public static void main(String\[\] args) \{  
File f1=new File("C:\\\\Users\\\\Administrator\\\\Desktop\\\\s\\\\测试");  
File f2=new File("C:\\\\Users\\\\Administrator\\\\Desktop\\\\s" );  
   String fl1=f1.getPath();  
   String fl2=f2.getPath();  
   String name=getName(fl1);  
       ll zc = new ll(fl2+"\\\\"+name+".zip");  
       zc.compress(fl1);  //压缩一个文件夹  
  
  \}  
\}