2013-05-15 49 views
0

我通過URL向另一個jsp頁面傳遞變量值,但是當我在第二個jsp頁面上運行System.out.println來檢查變量值時,它始終爲空。使用url在jsp頁面之間發送變量

任何幫助表示讚賞。

下面的代碼是我的原始程序的片段,以減少羅嗦。

Testsend.jsp

<%@ page import ="java.sql.*" %> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 
<title>Insert title here</title> 
</head> 
<body> 
    <!-- Prints out Table header --> 
    <table border="1"> 
    <tr> 
    <td>Title</td> 
    </tr> 
<% 

PreparedStatement pstmt; 

pstmt = conn.prepareStatement("Select * from tadot"); 

ResultSet rs = pstmt.executeQuery(); 

while(rs.next()){ 

    out.println("<form action ='Testsend.jsp' method='post'"); 
    out.println("<tr>"); 
    out.println("<td>" + rs.getString("Title") + "</td>"); 
    out.println("<td> <input type='hidden' name='hidden' value='"+rs.getString("Title")+"'> <input type='submit' name='editm' value='Edit'> </td>"); 
    out.println("</tr>"); 
    out.println("</form>"); 
    } 

String ed=""; 

// Check if edit button is clicked 
if(request.getParameter("editm") != null) { 
    String getmov3 = request.getParameter("hidden"); 
    // DEBUG - PRINTS OUT VALUE CORRECTLY 
    System.out.println("Testsend.jsp"+getmov3); 
    ed = getmov3; 
    // DEBUG - PRINTS OUT VALUE CORRECTLY 
    System.out.println(ed); 

// Passes variable ed to Testrec.jsp  
response.sendRedirect("Testrec.jsp?ed"+ed); 

} 

%> 
</table> 

</body> 
</html> 

Testrec.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
    pageEncoding="ISO-8859-1"%> 
     <%@ page import ="java.sql.*" %> 
<!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> 

<% 

    String getmov2 = request.getParameter("ed"); 
    // DEBUG - NULL VALUE PRINTED. ERROR. 
    System.out.println("Testrec.jsp"+getmov2); 

%> 
</body> 
</html> 

回答

1

看起來,你錯過了"="

response.sendRedirect("Testrec.jsp?ed="+ed); 
+0

非常感謝。該死的只是錯過了一個標點符號,這讓我非常頭疼。 – iridescent