Extracting zipped file from ResourceStream throws error “Invalid stored block lengths”

Question

I am trying to extract a ZIP file from my current JAR using:

InputStream resource = getClass().getClassLoader().getResourceAsStream(name);

Answer 1

Thanks to @PaulBGD's answer above. It saved me hours to figure out what happened to my system I add the following new snippets into my pom.xml file (which I didn't realize is the root cause before reading Paul's answer):

<resources>
  <resource>
    <directory>src/main/resources</directory>
    <filtering>true</filtering>
    <includes>
      <include>**/*.version</include>
      <include>**/*.properties</include>
      <include>**/*.xml</include>
      <include>**/*.csv</include>
      <include>**/*.txt</include>
      <include>**/*.gif</include>
      <include>**/*.json</include>
      <include>**/*.xlsx</include>
      <include>rythm/**</include>
    </includes>
  </resource>
</resources>

However I didn't take Paul's answer directly, instead I don't think those xlsx files should go through the resource plugin's filtering pipeline, thus I added another resource into pom:

  <resource>
    <directory>src/main/resources</directory>
    <filtering>false</filtering>
    <includes>
      <include>**/*.xlsx</include>
    </includes>
  </resource>

And it fixed my problem without changing the source encoding setting from UTF-8 to ISO-8859-1

Answer 2

Change spring-boot-starter-parent to 2.0.4.RELEASE. It worked for me.

  <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath />
    </parent>

Answer 3

After a few more hours of searching, I decompiled the maven-resources-plugin and noticed it used UTF-8 encoding by default. I quickly looked up the encoding I would need (ISO-8859-1) and put it in my pom.

<properties>
    <project.build.sourceEncoding>ISO-8859-1</project.build.sourceEncoding>
</properties>

Now the zip file copies into the jar perfectly, no corruption at all.