如何将对象值从servlet发送到jsp页面
[英]how to send a object value from a servlet to a jsp page
问题描述
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
BufferedReader br = new BufferedReader(new FileReader("src/suraj.txt"));
String everything="rahul";
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null)
{
sb.append(line);
sb.append("\n");
line = br.readLine();
everything = sb.toString();
}
request.setAttribute("date",everything);
RequsetDispatcher rd= Requ//here i got stuck how to forward the request to a jsp file }
}
I want to send the value of my String variable that is everything to a jsp file so that I can display it on the browser. 
我想将所有内容的String变量的值发送到一个jsp文件，以便可以在浏览器中显示它。
3 个解决方案
解决方案1
0 2013-03-25 19:30:13
您可以将请求转发到jsp文件，并在jsp文件中使用request.getattribute...。更好地，您可以学习基础教程并了解其工作原理。
解决方案2
0 2013-03-25 19:34:57
In the JSP, to receive an attribute, try to do this thing: 在JSP中，要接收属性，请尝试执行以下操作：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%
String everything = (String) request.getAttribute("date");
System.out.println(everything);
%>
UPDATE: 更新：
In addition, if you want set the value to a Java Script variable: 另外，如果要将值设置为Java Script变量：
<script language="JavaScript" type="text/JavaScript">
var strEverything= '<%=everything%>';
</script>
UPDATE ACTION: 更新动作：
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
BufferedReader br = new BufferedReader(new FileReader("src/suraj.txt"));
String everything="rahul";
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null)
{
sb.append(line);
sb.append("\n");
line = br.readLine();
everything = sb.toString();
}
request.setAttribute("date",everything);
RequestDispatcher requestDispatcher ;
requestDispatcher = request.getRequestDispatcher("/thankYou.jsp" ) ;
requestDispatcher.forward( request, response ) ;
}
解决方案3
0 2013-03-25 19:39:58
in JSP u need to get like String data=request.getAttribute("date")+""; 在JSP中，您需要像String data = request.getAttribute（“ date”）+“”; then u will get the value in jsp Make sure your response should be that jsp then only u got the request scope. 那么您将在jsp中获取值确保您的响应应为jsp，然后只有您获得了请求范围。 other wise put session.setAttribute("date",everthing); 其他明智的做法session.setAttribute（“ date”，everything）; in jsp session.getAttribute("date"); 在jsp session.getAttribute（“ date”）;中 then u will get any where. 那么你会在任何地方。
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