IOException-使用FileOutputStream拒绝访问

问题在于这些调用彼此接替：

  fileToWrite.mkdirs(); //creates a directory e.g. C:tempfoox  fileToWrite.createNewFile(); //attempts to create a file C:tempfoox

创建操作失败，因为您刚刚创建的目录名与要创建的文件相同。

您要执行的操作是：

fileToWrite.getParentFile().mkdirs()

而且，

createNewFile()

根据您的代码。以下“解压缩”一个zip文件：

import java.io.*;import java.util.zip.ZipFile;import java.util.zip.ZipEntry;import java.util.Enumeration;public class Unzipper {    public static void main(String[] args) throws IOException {        final File file = new File(args[0]);        final ZipFile zipFile = new ZipFile(file);        final byte[] buffer = new byte[2048];        final File tmpDir = new File(System.getProperty("java.io.tmpdir"), zipFile.getName());        if(!tmpDir.mkdir() && tmpDir.exists()) { System.err.println("Cannot create: " + tmpDir); System.exit(0);        }        for(final Enumeration entries = zipFile.entries(); entries.hasMoreElements();) { final ZipEntry zipEntry = (ZipEntry) entries.nextElement(); System.out.println("Unzipping: " + zipEntry.getName()); final InputStream is = zipFile.getInputStream(zipEntry); final File fileToWrite = new File(tmpDir, zipEntry.getName()); final File folder = fileToWrite.getParentFile(); if(!folder.mkdirs() && !folder.exists()) {     System.err.println("Cannot create: " + folder);     System.exit(0); } if(!zipEntry.isDirectory()) {     //No need to use buffered streams since we're doing our own buffering     final FileOutputStream fos = new FileOutputStream(fileToWrite);     int size;     while ((size = is.read(buffer)) != -1) {         fos.write(buffer, 0, size);     }     fos.close();     is.close(); }        }        zipFile.close();    }}

免责声明：我还没有测试过最基本的内容。