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分享session无法获得第一个jsp页面的值
//第一个页面
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String a="20171858";
session.setAttribute("sno2", a);
out.print(session.getAttribute("sno2"));
%>
<form name="form4" action="2.jsp" method="post">
<table>
<tr>
<td colspan="2"><input type="submit" value="更新"></td>
</tr>
</table>
</form>
</body>
</html> //第二个页面 <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<title>更新结果</title>
</head>
<body>
<%request.setCharacterEncoding("utf-8");
String a = String.valueOf(session.getAttribute("sno2"));
out.print(a);
%>
</body>
</html>.
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String a="20171858";
session.setAttribute("sno2", a);
out.print(session.getAttribute("sno2"));
%>
<form name="form4" action="2.jsp" method="post">
<table>
<tr>
<td colspan="2"><input type="submit" value="更新"></td>
</tr>
</table>
</form>
</body>
</html> //第二个页面 <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<title>更新结果</title>
</head>
<body>
<%request.setCharacterEncoding("utf-8");
String a = String.valueOf(session.getAttribute("sno2"));
out.print(a);
%>
</body>
</html>.
...全文
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