File中的delete()

一般来说 java file.delete失败 有以下几个原因：

1.看看是否被别的进程引用，手工删除试试。

2.file是文件夹 并且不为空，有别的文件夹或文件。

3.极有可能有可能自己前面没有关闭此文件的流 。

 

如：

public static void unZipFromFile(File file){
		
		try {
			ZipFile zipFile = new ZipFile(file);
			
			Enumeration e = zipFile.getEntries();
			
			ZipEntry zipEntry = null;
			String outPutDictroy = file.getName();
			createDirectory(outPutDictroy, "");
			
			while (e.hasMoreElements()) {
				zipEntry = (ZipEntry) e.nextElement();
				System.out.println("unziping "+zipEntry.getName());
				
				if(zipEntry.isDirectory()){
					
					String name = zipEntry.getName();
					name= name.substring(0, name.length()-1);
					File outPutFile = new File(outPutDictroy+name);
					outPutFile.mkdir();
					System.out.println("创建目录:"+outPutDictroy+name);
				}else{
					
					String name = zipEntry.getName();
					name = name.replace('\\', '/');
					if(name.indexOf("/")!=-1){
						createDirectory(outPutDictroy, name.substring(0, name.lastIndexOf("/")));
						 name=name.substring(name.lastIndexOf("/")+1,name.length());
					}
					
					  File f = new File(outPutDictroy + File.separator + zipEntry.getName());
					  f.createNewFile();
					  
					  InputStream in = zipFile.getInputStream(zipEntry);
			          FileOutputStream out=new FileOutputStream(f);

			          byte[] by = new byte[1024];
			          int c;
			          while ( (c = in.read(by)) != -1) {
			            out.write(by, 0, c);
			          }
			          out.close();
			          in.close();
			        }

				}
			
			zipFile.close(); //如果不关闭该流，则无法删除该文件
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}

 

 

PS:转载自一下文章，略作修改：

http://fujinbing.iteye.com/blog/563699