Syntax error, annotations are only available if source level is 5.0

生成的代理类中如果出现以下错误： Syntax error,annotations are only available if source level is 5.0 解决办法：Project->JavaCompiler->Compiler Compliance Level->Select "5.0" or Higher Project->Java Build Path->Libraries->Add Library...->JUnit->Select "JUnit 4.0"->Finish 经过以上设置后可顺利解决问题。