JSP 页面用jstl获取数据问题

吸尘器 2014-10-20 03:50:26

后台在request中存在
键值
aa "12345"
bb "${aa}"

在jsp中有没有什么处理能通过 bb 取到 "12345"

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wanghualeilei 2014-10-21

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引用 9 楼 chenxinhui741 的回复:

[quote=引用 7 楼 u014658559 的回复:]

public class text1 extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String aa = "12345";
		request.setAttribute("aa", aa);
		request.getRequestDispatcher("/WEB-INF/pages/text2.jsp").forward(request, response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

感谢回答不过可能没理解我的意思。我是开发一个页面编辑器，可以创建页面元素，比如创建了个元素 <input name="input01" value="${dataMap['input01']}" /> 我会把创建的这个元素保存在数据库然后再其它地方查出用到这个元素在页面输出这个元素，现在输出时<input name="input01" value="${dataMap['input01']}" /> 但我想要的输出是(在后台有个Map，Map中有.put("input01","2")，这个map存在request中)<input name="input01" value="2" /> [/quote] "然后再其它地方查出用到这个元素" 其他地方是指什么地方？查出来之后放到哪里

吸尘器 2014-10-20

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引用 7 楼 u014658559 的回复:

public class text1 extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String aa = "12345";
		request.setAttribute("aa", aa);
		request.getRequestDispatcher("/WEB-INF/pages/text2.jsp").forward(request, response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

笑為紅顏苦為誰 2014-10-20

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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    <title>My JSP 'text2.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>	
  	bb=${aa}
  </body>
</html>

笑為紅顏苦為誰 2014-10-20

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public class text1 extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String aa = "12345";
		request.setAttribute("aa", aa);
		request.getRequestDispatcher("/WEB-INF/pages/text2.jsp").forward(request, response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

吸尘器 2014-10-20