tomcat 热部署 修改jsp不需要重新编译（亲测有效）

解决方案：在C:\Program Files\Apache Software Foundation\Tomcat 6.0\conf\server.xml的Host内容里面添加<Context/>内容如下：
      

<Host name="localhost"  appBase="WebRoot"
unpackWARs="true"
xmlValidation="false" xmlNamespaceAware="false">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
-->
<Context path="/courseWeb" docBase="D:\\JAVA\\courseWeb\\WebRoot" debug="99" reloadable="true" />
</Host>

    其中path改成项目名称。docbase是你的workspace下的代码真实路径。