debian/changelog

 zip4j (1.3.3+ds-1) unstable; urgency=medium
 
-  * Initial release (Closes: #nnnn)
+  * Initial release (Closes: #929421)
 
  -- Andrius Merkys <merkys@debian.org>  Thu, 23 May 2019 01:19:51 -0400

debian/repack.sh

+#!/bin/sh
+
+JAR="$1"
+PKG_NAME=$(basename ${JAR} .jar)
+REPKG_NAME=$(basename ${PKG_NAME} -sources | sed 's/-/_/g')+ds.orig.tar.gz
+
+TMPDIR=$(mktemp -d)
+
+cp ${JAR} ${TMPDIR}
+
+(
+    cd ${TMPDIR}
+    jar xf $(basename ${JAR})
+    mkdir --parents zip4j/src/main/java
+    mv net zip4j/src/main/java
+    tar -cvzf ${REPKG_NAME} zip4j
+)
+
+cp ${TMPDIR}/${REPKG_NAME} .
+rm -rf ${TMPDIR}

debian/watch

+version=4
+opts="dversionmangle=s/\+ds$//,repacksuffix=+ds" \
+ http://central.maven.org/maven2/net/lingala/zip4j/zip4j/(\d.*)/ \
+ zip4j-([\d\.]+)-sources.jar debian sh debian/repack.sh