zip文件解压或压缩

港控/mmm° 2022-08-06 15:29 262阅读 0赞

<span style="font-size:18px;">/**
     * lsz
     */
    public final class ZipUtil {
    
    	/**
    	 * 解压zip文件
    	 * @param unZipfile
    	 * @param destFile
    	 */
    	public static void unZip(String unZipfile, String destFile) {
            FileOutputStream fileOut;
            File file;
            InputStream inputStream;
            byte[]   buf = new byte[1024*4];
            try {
                //生成一个zip的文件
            	ZipFile   zipFile = new ZipFile(unZipfile, "GBK");
                //遍历zipFile中所有的实体，并把他们解压出来
                for (@SuppressWarnings("unchecked")
                Enumeration<ZipEntry> entries = zipFile.getEntries(); entries
                        .hasMoreElements();) {
                    ZipEntry entry =  entries.nextElement();
                    //生成他们解压后的一个文件  
                    file = new File(destFile+File.separator+entry.getName());
      
                    if (entry.isDirectory()) {
                        file.mkdirs();
                    } else {
                        // 如果指定文件的目录不存在,则创建之.
                        File parent = file.getParentFile();
                        if (!parent.exists()) {
                            parent.mkdirs();
                        }  
                        //获取出该压缩实体的输入流 
                        inputStream = zipFile.getInputStream(entry);
      
                        fileOut = new FileOutputStream(file);
                        int length = 0;
                        //将实体写到本地文件中去
                        while ((length = inputStream.read(buf)) > 0) {
                            fileOut.write(buf, 0, length);
                        }
                        fileOut.close();
                        inputStream.close();
                    }
                }
                zipFile.close();
                //解压完后将原压缩文件删除
                File zipfile = new File(unZipfile);
    			if(zipfile.exists()){
    				zipfile.delete();
    			}	
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    	
    
    	 
    	/**
    	 * 一个文件夹压缩
    	 * 压缩文件夹
    	 * @param filepath
    	 * @param savepath
    	 * @throws Exception
    	 */
    	  public static void toZip(String filepath,String savepath) throws Exception{
    		  File file = new File(filepath);
    		  if(file.exists()){
    			  //判断导出路径是否为空，如果为空，则将压缩包生成到当前路径下
    			  if(StringUtils.isBlank(savepath)){
    				  savepath = filepath+".zip";
    			  }else{
    				  savepath = savepath+".zip";
    			  }
    			  ZipOutputStream outPut = new ZipOutputStream(new FileOutputStream(new File(savepath)));  
    		      outPut.setEncoding("GBK");//设置编码  
    		      createZip(outPut,file.listFiles(),null); 
    		      outPut.flush();  
    		      outPut.close();
    		  }else{
    			  //not found
    			  throw new RuntimeException("Err ：not found file exception："+filepath);  
    		  }		
    	  }
    	  
    	  private static void createZip(org.apache.tools.zip.ZipOutputStream outPut,File[] listFiles,String fuPath) throws Exception {  
    	        for(File f : listFiles){  
    	            String name = fuPath==null?f.getName():fuPath+"/"+f.getName();;  
    	            if(f.isDirectory()){  
    	                outPut.putNextEntry(new ZipEntry(name+"/"));  
    	                createZip(outPut,f.listFiles(),name);  
    	            }else{  
    	                outPut.putNextEntry(new ZipEntry(name));  
    	                InputStream is = new FileInputStream(f);  
    	                byte[] bys = new byte[1024];  
    	                int len = 0;  
    	                while((len = is.read(bys))!=-1)  
    	                    outPut.write(bys, 0, len);  
    	                is.close();  
    	                outPut.flush();  
    	            }  
    	        }  
    	    } 
    	  
    	  /*
    	   * 复制文件 只能使复制文件，不能复制文件夹
    	   */
    	  public static void fileChannelCopy(File fromfile, File tofile) {
    	        FileInputStream fi = null;
    	        FileOutputStream fo = null;
    	        FileChannel in = null;
    	        FileChannel out = null;
    	        try {
    	            fi = new FileInputStream(fromfile);
    	            fo = new FileOutputStream(tofile);
    	            in = fi.getChannel();//得到对应的文件通道
    	            out = fo.getChannel();//得到对应的文件通道
    	            in.transferTo(0, in.size(), out);//连接两个通道，并且从in通道读取，然后写入out通道
    	        } catch (IOException e) {
    	            e.printStackTrace();
    	        } finally {
    	            try {
    	                fi.close();
    	                in.close();
    	                fo.close();
    	                out.close();
    	            } catch (IOException e) {
    	                e.printStackTrace();
    	            }
    	        }
    	    }
    }</span>