mid不能解析爲變量

所以我再次堅持這個這是我的代碼爲.JSP頁，我試圖點擊一個藝術家的名字，它會顯示電影，他們出現在我擁有的一切在第一個查詢中工作，但是當我到達queryMovies時，我嘗試將電影的標題改回到應該帶我到另一個頁面的電影ID，我得到的錯誤中間無法解析爲變量。我究竟做錯了什麼？謝謝。mid不能解析爲變量

<html> 
<head> 
<%@ include file="header.htm" %> 
<%@ page import="java.sql.*" %> 
<% 
    Class.forName("com.mysql.jdbc.Driver").newInstance(); 
    String cs="jdbc:mysql://localhost:3306/hunters?user=root&password=password"; 
    Connection cxn = DriverManager.getConnection(cs); 
    Statement stm = cxn.createStatement(); 

int oscar = 0; 

String fname = request.getParameter("fname"); 
String lname = "", dob = "", nation = "", imdb = "", url = "", newaid = "", title = "", studio = "", role = "", rlsdate = ""; 
String queryArtist = "SELECT * FROM artist WHERE aid = '" + request.getParameter("selectedName") + "';"; 

ResultSet rsArtist = stm.executeQuery(queryArtist); 

    rsArtist.next(); 
    fname = rsArtist.getString("fname"); 
    lname = rsArtist.getString("lname"); 
    dob = rsArtist.getString("dob").substring(0,4); 
    nation = rsArtist.getString("nation"); 
    imdb = rsArtist.getString("imdb"); 
    url = rsArtist.getString("url"); 
%> 
    <title><%= fname %> <%= lname %></title> 

<h2><FONT COLOR="B22222"><%= fname%> <%= lname%></FONT></h2> 

<p>Born in: <%= dob%></p> 
<p>Nationality: <%= nation%></p> 
<p>IMDB Bio: <a href="http://www.imdb.com/name/<%= imdb%>/" target="_blank">http://www.imdb.com/name/<%= imdb%>/</a></p> 
<% 
if (url == null) 
{ 
out.println("<br />"); 
} 
else 
{ 
out.println("Website: <a href=" + url + "target=_blank>" + url + "</a><br>"); 
} 
%> 
<hr /> 
<h3><FONT COLOR="B22222">Filmography</FONT></h3> 
<% 
newaid = request.getParameter("selectedName"); 



String queryMovies = "SELECT * FROM artist, movies, artistmovie WHERE artistmovie.mid = movies.mid AND artist.aid = artistmovie.aid AND artist.aid = '"; 
    queryMovies += request.getParameter("selectedName") + "';"; 

ResultSet rsMovies = stm.executeQuery(queryMovies); 

while(rsMovies.next()) 
{ 
    title = rsMovies.getString("title"); 
    studio = rsMovies.getString("studio"); 
    rlsdate = rsMovies.getString("rlsdate"); 
    role = rsMovies.getString("role"); 
    oscar = rsMovies.getInt("oscar"); 
    mid = rsMovies.getInt("mid"); 

    out.println("<tr><td>&nbsp;</td><td><a href= artistmovie.jsp?SelectedTitle=" + mid + ">" + title + " <a/></td>"); 
    out.println("<td>&nbsp;&nbsp;&nbsp;</td><td>(" + studio + "</a></td>"); 
    out.println("<td></td><td>" + rlsdate + ")</td>"); 
    out.println("<td>&nbsp;&nbsp;</td><td>" + role + "</td></br></br>"); 

} 
if (oscar == 0) 
{ 
    out.println("<td>&nbsp;</td><td><br /></td>"); 
} 
else 
{ 
    out.println("<td>&nbsp;</td><td>Won oscar</td></tr>"); 
} 
%> 
<%@ include file="footer.htm" %> 
</body> 
</html>

來源

2012-04-17 user1186518

無關具體問題，你有一個[SQL注入]（http://en.wikipedia.org/wiki/SQL_injection）攻擊漏洞，你泄漏數據庫資源。 – BalusC 2012-04-17 17:30:34

對不起，如果我做錯了BalusC這是一個假設的數據庫，不會放在任何地方。希望我的新鮮事不會造成任何問題。 – user1186518 2012-04-17 17:47:38

更改

out.println("<tr><td>&nbsp;</td><td><a href= artistmovie.jsp?SelectedTitle=" + mid + ">" + title + " <a/></td>");

到

out.println("<tr><td>&nbsp;</td><td><a href=\"artistmovie.jsp?SelectedTitle="+ mid +"\">" + title + " <a/></td>");

應該工作。

比這

out.println("<td>&nbsp;&nbsp;&nbsp;</td><td>(" + studio + "</a></td>");

其他你在哪裏開始「<a>」標籤，它正在結束不久的「<td>」。

來源

2012-04-17 16:27:50

謝謝你的幫助Hardik。我仍然收到錯誤，雖然顯示第63行中的錯誤是中間= rsMovies.getInt（「mid」）; while語句下的。 blah – user1186518 2012-04-17 16:41:04

你在哪裏宣佈所有變量？提供完整的堆棧跟蹤。 – 2012-04-17 17:15:32

再次感謝Hardik多數民衆贊成它只需要問正確的問題:)我在哪裏宣佈Varibles你是男人！ – user1186518 2012-04-17 17:32:25

mid不能解析爲變量

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