修改代码后，不重启tomcat的小技巧
使用一个jrebel.jar包可以让减少启动tomcat的次数。
1、比如下载的jrebel.jar包，放置在C:\test\jrebel\jrebel.jar下。
2、有了第一步的操作，你此时可以在配置你的tomcat的地方，的最后一项Optional program? arguments 的值为：
???? -noverify -javaagent:C:/test/jrebel/jrebel.jar
?
3、在左边的菜单栏中的，进入Tomcat选项中后，为JDK也配同样的优化参数。
?
启动tomcat，此时在tomcat的最前方有：---》 表示安装成功
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