点击导入Excel报404错误，代码如下

index.jsp的代码

<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    request.setAttribute("basePath",basePath);
%>
//省略中间代码
<h3 onclick="clickSecondMenu(this,'<%=basePath%>importExcel')">
   <a>导入Excel</a>
</h3>

serlvet代码

public class ImportExcelInitServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.getRequestDispatcher("/WEB-INF/jsp/importExcel.jsp").forward(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
}

web.xml配置

<servlet>
    <servlet-name>ImportExcelInitServlet</servlet-name>
    <servlet-class>com.my.servlet.ImportExcelInitServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>ImportExcelInitServlet</servlet-name>
    <url-pattern>/importExcel</url-pattern>
</servlet-mapping>

网页f12开发者工具报错信息

/**

 * 方法描述:单击二级菜单（页面左部菜单），初始化主页面

 */

function clickSecondMenu(element,src) {

var nodes = document.getElementById('menuDiv').children;

for(var i = 0; i < nodes.length; i++) {

nodes[i].children[0].className = '';

}

element.children[0].className = 'on';

//setAttribute('src',src);这里红色下划线错误，fail to load resourse

document.getElementById('mainPage').setAttribute('src',src);

}