JDK-8254840 : Release Note: Refine ZipOutputStream.putNextEntry() to Recalculate ZipEntry's Compressed Size
- Type: Sub-task
- Component: core-libs
- Sub-Component: java.util.jar
- Affected Version: 16
- Priority: P4
- Status: Closed
- Resolution: Delivered
- Submitted: 2020-10-15
- Updated: 2021-12-03
- Resolved: 2020-10-16
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| JDK 16 |
|---|
16Resolved  |
Description
Prior to JDK 16, `ZipOutputStream.putnextEntry()` would not recalculate the compressed size for a compressed (DEFLATED) entry. This could result in the ZipException, "invalid entry compressed size", being thrown if the current ZLIB implementation being used when `ZipOutputStream.putNextEntry()` was called differed from the implementation at the time when the entry was added to the original ZIP file. Starting with JDK 16, if the compressed size has not been explicitly set with the `ZipEntry.setCompressedSize(long)` method when writing a compressed (DEFLATED) entry, then the compressed size is set to the actual compressed size after deflation.