HTTP Status 500 错误是怎么回事啊？？

Question

怎么导入类啊？～～这是index.jsp中使用JavaBean的代码：<jsp:useBean id="connectionPool" scope="application" type="ConnectionPool" /><jsp:useBean id="dbBridge" scope="page" class="DBBridge" >
<jsp:setProperty name="dbBridge" property="connectionPool" value="<%=connectionPool%>" />
<jsp:setProperty name="dbBridge" property="bridgeSwitch" value="on" />
</jsp:useBean><jsp:useBean id="loginUser" scope="page" class="LoginUser" >
<jsp:setProperty name="loginUser" property="id" param="id" />
<jsp:setProperty name="loginUser" property="password" param="password" />
<jsp:setProperty name="loginUser" property="dbBridge" value='<%=dbBridge%>' />
</jsp:useBean>

Answer 1

类里面有包吗?
比如:ConnectionPool类中,定义过包吗,如果有,加上,

Answer 2

在Bean类中加上package指令，把编译后的包放在WEB-INF\classes下就好了~~
谢谢大家~~