使用CGLib完成代理模式遇到的错误

最新推荐文章于 2022-12-31 17:38:01 发布

转载最新推荐文章于 2022-12-31 17:38:01 发布 · 643 阅读

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原文链接：http://www.cnblogs.com/woniu4/p/8384020.html

文章标签：

#java

本文记录了解决CGLIB使用过程中遇到的NoClassDefFoundError和VerifyError错误的过程，通过调整ASM版本最终解决问题。

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错误堆栈信息：

Exception in thread "main" java.lang.NoClassDefFoundError: org/objectweb/asm/Type
    at net.sf.cglib.core.TypeUtils.parseType(TypeUtils.java:184)
    at net.sf.cglib.core.KeyFactory.<clinit>(KeyFactory.java:66)
    at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
    at com.xxxx.model.proxy.cglib.CglibProxy.getProxy(CglibProxy.java:14)
    at com.xxxx.model.proxy.cglib.TestProxy.main(TestProxy.java:11)
Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.Type
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 5 more

通过网上查询，发现是由于缺少jar包导致，引入了asm4.1.jar，又出现新的错误信息。

异常堆栈信息如下：

Exception in thread "main" java.lang.VerifyError: class net.sf.cglib.core.DebuggingClassWriter overrides final method visit.(IILjava/lang/String;Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;)V
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at net.sf.cglib.core.AbstractClassGenerator.<init>(AbstractClassGenerator.java:38)
    at net.sf.cglib.core.KeyFactory$Generator.<init>(KeyFactory.java:127)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:112)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
    at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
    at com.xxxx.model.proxy.cglib.CglibProxy.getProxy(CglibProxy.java:14)
    at com.xxxx.model.proxy.cglib.TestProxy.main(TestProxy.java:11)