当我尝试使用JSTL时,JSP无法识别我用Servlet提供的数据。我可以在JSP中使用Java代码访问请求属性,但不使用JSTL。
我正在使用tomcat服务器。当我使用Maven时,我尝试更改POM XML中的一些依赖项。现在我使用的是JSTL的1.2版。
来自pom.xml
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
<scope>runtime</scope>
</dependency>
...
servlet
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String data = "Some data, can be a String or a Javabean";
request.setAttribute("data", data);
request.setAttribute("userList", users);
RequestDispatcher rd = request.getRequestDispatcher("/DisplayUsers.jsp");
rd.forward(request, response);
}
...
来自位于WebApp文件夹中的.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<html>
<head>
<title>Alle gespeicherten Nutzer</title>
<meta content = "text/html; charset = UTF-8"/>
</head>
<body>
<% String name = request.getAttribute("data").toString(); //this works
out.print(""+name);
%>
<p>The data from servlet: ${data}</p> // THIS DOESN´T recognize data
预期输出:来自Servlet的数据:某些数据可以是字符串或Javabean实际输出:Servlet的数据:$ {data}
尝试此导入的JSP
&lt;%@ page contentType =" text/html; charset = utf-8"语言=" java"%> 这个&lt;%@ page cageencoding =" utf-8" contentType =" text/html; charset = utf-8" trimDirectivewhitespaces =" true" true" true"%>