解决导入spring源码org.springframework.cglib.core.ClassGenerator无法编译的错误 https://blog.csdn.net/xiongyouqiang/article/details/78395187
2.spring4源码GroovyDynamicElementReader报错 要安装一个eclipse的groovy插件，之间的插件不大管用。 在eclipse的 Help -> Install New Software 中，添加groovy的下载连接： http://dist.springsource.org/milestone/GRECLIPSE/e4.4/
然后全选后，开始下载，下载完后，重启eclipse，然后clean一下项目就搞定了。
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