将数据从servlet传递给jsp而没有表单？ [英] Pass data from servlet to jsp without forms?
问题描述
所以我在这里要做的就是从servlet中获取JSP中没有任何形式的酒店列表。
So what I'm basically trying to do here is get a list of hotels in JSP , from the servlet , without any forms.
这是我的JSP：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<ul>
<c:forEach var="elem" items="${list}">
<li>${elem.name}</li>
</c:forEach>
</ul>
</body>
</html>
Servlet功能：
Servlet function:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
java.util.List<Hotel> list = model.getAllHotels();
request.setAttribute("list", list);
RequestDispatcher rDispatcher = request.getRequestDispatcher("/index.jsp");
rDispatcher.forward(request, response);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
现在我知道如何通过表单获取/ post，因为servlet具有特定的功能。但是如何在没有表单的情况下发送这些数据？
Now I know how to do this via form with get / post , since the servlet has specific functions for that. But how can I send this data without forms ?
推荐答案
您只需要一个指向您的servlet的链接：
You simply need a link to your servlet:
<a href="<c:url value='/yourServlet' />">Click here to list the hotels</a>
您也可以通过在浏览器的地址栏中输入地址来调用servlet：
You can also invoke the servlet by typing its address in the address bar of your browser:
http://localhost:8080/yourWebApp/yourServlet
你的servlet的代码很好，以及JSP的代码。
The code of your servlet is fine, and the code of the JSP as well.
servlet被映射到某个URL （在我的示例中为 / yourServlet ），这要归功于web.xml中的< servlet-mapping> 元素，或者感谢servlet类上的 @WebServlet 注释。
The servlet is mapped to some URL (/yourServlet in my example) thanks to a <servlet-mapping> element in the web.xml, or thanks to a @WebServlet annotation on the servlet class.
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