Question

我有4个jsp文件和1个js文件：index.jsp，connect.jsp，load1.jsp，load2.jsp和function.js。请参阅以下代码以了解它们之间的关系。

index.jsp的

<%@include file = "load1.jsp" %>
<%@include file = "load2.jsp" %>

connect.jsp

<%!
    public String makeConnection(){
        String str = "connect to database";
        return str;
    }
%>

load1.jsp

<%@include file = "connect.jsp" %>
<%
    out.print(makeConnection());
%>
<button onclick = "doXHR()">load2</button>

load2.jsp

<%@include file = "connect.jsp" %>
<%
    out.print(makeConnection());
%>

function.js

function doXHR(){
    ...
    xmlhttp.open("GET", "load2.jsp", true);
    ...
}

请注意，这些代码不是实际代码，因为我必须使其更简单，所以我可以在这里发布。问题是，当我转到index.jsp时，会出现类似makeConnection() is already defined的错误。

如果我从<%@include file = "connect.jsp" %>删除此行load2.jsp，它将会有效，但如果我点击该按钮，则会提供500个状态代码，其错误类似于cannot find symbol: method makeConnection()。登记/> 我怎么解决这个问题？谢谢！

如何在JSP中避免递归和多个include指令？

0 个答案: