java - ZipOutputStream - 先 closeEntry() 或先 close()

Question

以下是部分代码。我需要在 finally 子句中关闭资源。我需要先调用 closeEntry() 还是 close()？我收到一些错误消息。

Error closing the zipoutjava.io.IOException: Stream closed at 
  java.util.zip.ZipOutputStream.ensureOpen(ZipOutputStream.java:70) at 
  java.util.zip.ZipOutputStream.closeEntry(ZipOutputStream.java:189)

代码

 ZipOutputStream zos = null;

  try{

    ZipEntry entry = new ZipEntry("file.csv")
    zipout.putNextEntry(entry);
            csvBeanWriter = new CsvBeanWriter(writer,
                    CsvPreference.STANDARD_PREFERENCE);
            csvBeanWriter.writeHeader(header);
            for (Book book : bookList) {
                csvBeanWriter.write(book, header);
                csvBeanWriterTest.write(book, header);

            }

        } catch (Exception e) {
            logger.error("Export of package data failed: "
                    + e);

        } finally {

            if (zipout != null) {
                try {
                    zos.closeEntry();
                    zos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    logger.error("Error closing the zos"
                            + e);
                }
            }
}

Answer 1

考虑使用zipout的方案:

zipout = // open zipout someway
// do something with it
zipout.close();

所以，在 block 中，我们用 zipout 做一些事情，你应该创建和关闭条目:

ZipEntry z = ...
// do something with it
zipout.closeEntry();

最终的方案是:

zipout = ...

ZipEntry z1 = ...
zipout.putNextEntry(z1);
// write something to zipout
zipout.closeEntry();

ZipEntry z2 = ...
zipout.putNextEntry(z2);
// write something to zipout
zipout.closeEntry();

//...

ZipEntry zN = ...
zipout.putNextEntry(zN);
// write something to zipout
zipout.closeEntry();


zipout.close();

所以，你应该先关闭入口，然后zipout。

示例代码:https://community.oracle.com/thread/2097141?start=0