JDK不兼容异常(class file has wrong version 49.0, should be 48.0)及解决方法
在安装JDK1.4.2_11或更高版本的JDK,包括JDK1.5时,运行Tomcat5.0.x会出现类似如下异常:class file has wrong version 49.0, should be 48.0或:Unsupported major.minor version 49.0这是由于JDK的tools.jar版本与Tomcat所带的tools.jar版本不一致