[通过Java解压缩zip文件时获取FileNotFoundException

Question

我有一种通过Java解压缩zip文件的方法。

此方法效果很好。

但是最近我尝试使用此方法解压缩某个文件（最终output.zip），但遇到运行时异常。

下面是该方法的代码：

public static List<String> unzipFiles(File zipFile, File targetDirectory) {
    List<String> files = new ArrayList<String>();                       
    try (FileInputStream fileInputStream = new FileInputStream(zipFile); ZipArchiveInputStream zipInputStream = new ZipArchiveInputStream(new BufferedInputStream(fileInputStream));){                  
        ZipEntry zipEntry;
        while ((zipEntry = zipInputStream.getNextZipEntry()) != null) {
            int length;
            byte data[] = new byte[bufferGlb];
            String fileName = zipEntry.getName();
            File opFile = new File(targetDirectory, fileName);
            FileOutputStream fileOutputStream = new FileOutputStream(opFile);//This is the line where the exception is thrown
            BufferedOutputStream dest = new BufferedOutputStream(fileOutputStream, bufferGlb);
            while ((length = zipInputStream.read(data, 0, bufferGlb)) != -1) {
                dest.write(data, 0, length);
            }
            dest.flush();
            files.add(fileName);
            fileOutputStream.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    } 
    return files;
}
//library import used:
//import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;

请注意，我能够使用WinRar成功解压缩此文件。

在上面的代码中，我得到异常的行用注释标记。

我得到的异常的堆栈跟踪如下：

java.io.FileNotFoundException: final output/0123450.pdf (No such file or directory)
    at java.io.FileOutputStream.open0(Native Method) ~[?:1.8.0_191]
    at java.io.FileOutputStream.open(FileOutputStream.java:270) ~[?:1.8.0_191]
    at java.io.FileOutputStream.<init>(FileOutputStream.java:213) ~[?:1.8.0_191]
    at java.io.FileOutputStream.<init>(FileOutputStream.java:162) ~[?:1.8.0_191]
    at ZipUtility.unzipFiles(ZipUtility.java:281)

也是例外中提到的文件，0123450.pdf实际上在zip文件中。请帮助。

Answer 1

我以前也遇到过类似的问题。异常中提到的文件：

java.io.FileNotFoundException: final output/0123450.pdf (No such file or directory)
    at java.io.FileOutputStream.open0(Native Method) ~[?:1.8.0_191]
    at java.io.FileOutputStream.open(FileOutputStream.java:270) ~[?:1.8.0_191]
    at java.io.FileOutputStream.<init>(FileOutputStream.java:213) ~[?:1.8.0_191]
    at java.io.FileOutputStream.<init>(FileOutputStream.java:162) ~[?:1.8.0_191]
    at ZipUtility.unzipFiles(ZipUtility.java:281)

即0123450.pdf实际上位于文件夹final output中，而不是直接位于zip文件中。尝试使用包含直接位于其中的文件的zip文件