在序列化和存储在Jarfile中时,什么可以修改SerialVersionUID?

IOException during package import : java.util.ArrayList; local class incompatible: stream classdesc serialVersionUID = 8664875232659988799, local class serialVersionUID = 8683452581122892189

因此,我认为问题在于当我将序列化对象保存到Jarfile条目中时。我认为我做得对,因为可以正确读取以相同方式保存在Jarfile中的其他文件。 在使用“cmp”和“hexdump”后,我发现将其保存为jar会导致一个八位字节的变化,如果uuid是,否则内容是相同的。

我真的很失望,无法说明问题可能在哪里。

添加源代码:

/**
 * Writes content provided from a reader into a file contained in a jar.
 * 
 * @param output the output stream to write on
 * @param entryName the name of the file that will contain reader data
 * @param contentReader 
 * 
 * @return the zip entry that has been created into the jar
 */
ZipEntry writeEntry(JarOutputStream output, String entryName, ByteArrayInputStream input) {
    if (output == null || entryName == null || entryName.trim().length() == 0 || input == null) {
        throw new NullPointerException("Null argument passed");
    }

    ZipEntry entry = new ZipEntry(entryName);
    byte[] buffer = new byte[BUFFER_LENGTH];

    try {
        output.putNextEntry(entry);
        int nRead;

        while ((nRead = input.read(buffer, 0, BUFFER_LENGTH)) > 0) {
            output.write(buffer, 0, nRead);
        }

        output.closeEntry();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return entry;
}

/**
 * Export rules files to a serialized object (ArrayList<KnowledgePackage>) into 
 * an output stream, then write the output content as an entry of a jar.
 * 
 * @param os the output jar to write in
 */
void writeRulesPackageEntry(JarOutputStream os) {
    // serialize objects and write them to the output stream
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    RulesPackaging rulesPackaging = new RulesPackaging();
    rulesPackaging.exportResources(this.rules, output);

    // create a new input stream to read written objects from
    ByteArrayInputStream input = new ByteArrayInputStream(output.toByteArray());
    this.writeEntry(os, Product.ENTRY_RULES_PACKAGE, input);
}

/**
 * Creates a JarFile containing resources. 
 * 
 * @param filename the exported jar filename
 * @return the jar as an object, null if an error occured
 */
public JarFile exportToJar(String filename) {
    FileOutputStream fOs;
    JarOutputStream jOs;
    JarFile jar = null;

    try {
        fOs = new FileOutputStream(filename);
        jOs = new JarOutputStream(fOs);

        this.writeRulesPackageEntry(jOs);

        jOs.close();

        // construct a jar from the output jar
        jar = new JarFile(new File(filename));
    } catch (IOException e) {
        e.printStackTrace();
    }

    return jar;
}