Why ZipInputStream can't read the output of ZipOutputStream?

Question

I\'m stuck with this junit test:

public void test() throws Exception {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    ZipOutputStream zipOu         


        

Answer 1

Recently I had a similar problem while reading a zip bytes created using ZipOutputStream.

The following snippet led to java.lang.NegativeArraySizeException.

zipEntry = zipInputStream.getNextEntry();
byte[] bytes = new byte[(int) zipEntry.getSize()];

An quick solution it was to use Apache commons-io IOUtils to read the all bytes of current entry.

zipEntry = zipInputStream.getNextEntry();
byte[] bytes = org.apache.commons.io.IOUtils.toByteArray(zipInputStream);

I hope this will be helpful to someone.