Javassist编译导致类文件损坏

Question

bounty到期在7天内。该问题的答案有资格获得+ 100声望赏金。Mahmoud Hashim正在寻找来自信誉良好的来源的答案。

我正在尝试使用javassist在编译时插入一些代码片段

环境

• Java 8
• Spring Boot 2.2.6
• 休眠5.4.12.Final
• Javassist

<dependency>
 <groupId>nl.topicus.plugins</groupId>
 <artifactId>javassist-maven-plugin-core</artifactId>
 <version>2.0</version>
</dependency>

Pom插件

            <plugin>
                <groupId>nl.topicus.plugins</groupId>
                <artifactId>javassist-maven-plugin</artifactId>
                <version>2.0</version>
                <dependencies>
                    <dependency>
                        <groupId>org.apache.commons</groupId>
                        <artifactId>commons-lang3</artifactId>
                        <version>3.7</version>
                    </dependency>
                     <dependency>
                        <groupId>org.reflections</groupId>
                        <artifactId>reflections</artifactId>
                        <version>0.9.10</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <transformerClass>[PACKAGE].EACClassTransformer</transformerClass>
                    <packageName>c.w.c.e.entities</packageName>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>javassist</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

Transformer Class

public class EACClassTransformer extends ClassTransformer {

    @Override
    public void applyTransformations(ClassPool classPool, CtClass classToTransform) throws TransformationException {
        ACBCodeProcessor acb = new ACBCodeProcessor();
        try {
            if (classToTransform.getAnnotation(AccessControled.class) != null) {
                getLogger().info("Processing class [" + classToTransform.getName() + "]");
                acb.process(classToTransform);
            }
        } catch (ClassNotFoundException e) {

        }
    }

}

我遇到的编译错误是在testCompile步骤：

[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] [PATH]/EPAServiceTest.java:[17,44] cannot access [PACKAGE].EP
  bad class file: [PATH]/EP.class
    bad constant pool entry in RegularFileObject[[PATH]/EP.class]
      expected CONSTANT_Utf8_info or CONSTANT_String_info at index 212
    Please remove or make sure it appears in the correct subdirectory of the classpath.
[ERROR] [PATH]/EPAServiceTest.java:[6,1] cannot find symbol
  symbol:   static makeDTO
  location: class
[INFO] 2 errors 
[INFO] -------------------------------------------------------------

虽然错误表明无法访问文件，但EP.class内容如下：

  // IntelliJ API Decompiler stub source generated from a class file
  // Implementation of methods is not available

package corrupted_class_files;

清楚地显示损坏的文件

Answer 1

经过大量搜索，我发现插件使用的javassist版本是3.18.0-GA，与休眠的5.14.12.Final使用的版本不匹配。

因此，我已将插件javassist的依赖项重写为通过编译步骤的版本3.24.0-GA。