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我有一個java servlet將數組傳遞給一個jsp頁面,在該jsp頁面上它顯示了一堆結果。我試圖做的是當它打印出來打印一個鏈接,所以我可以用它作爲參數。在我的情況下,它打印出一大堆實驗室類,我想要發生的是他們點擊與該實驗室相關的鏈接,然後我單擊鏈接並可以在sql語句中使用該lab.id。Servlet Jsp數組打印鏈接
這裏是正在打印的數組的代碼進行
這裏是servlet
private void sendBack(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession(true);
//Set data you want to send back to the request (will be forwarded to the page)
//Can set string, int, list, array etc.
//Set data you want to send back to the request (will be forwarded to the page)
//Can set string, int, list, array etc.
String sql = "SELECT s.name, l.time, l.day, l.room" +
" FROM lab l, subject s, user_lab ul" +
" WHERE ul.user_id=" + (Integer)session.getAttribute("id") +" AND ul.lab_id ="+ "l.id"+" AND l.subject_id ="+"s.id";
try{
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/wae","root","");
System.out.println("got boobs");
System.out.println(session.getAttribute("id"));
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery(sql);
System.out.println(res);
ArrayList<String> list1 = new ArrayList<String>();
if (res.next()){
do{
list1.add(res.getString(1) + " " + res.getString(2) +" "+ res.getString(3) + " " + res.getString(4));
System.out.print(res.getString(1) + res.getString(2));
}while(res.next());
System.out.println("Outside");
String[] arr = list1.toArray(new String[list1.size()]);
request.setAttribute("res", arr);
}
}catch (SQLException e) {
}
catch (Exception e) {
}
//Decides what page to send the request data to
RequestDispatcher view = request.getRequestDispatcher("Lecturer_labs.jsp");
//Forward to the page and pass the request and response information
view.forward(request, response);
,這裏是JSP頁面
<h3>Manage Labs</h3>
<table>
<% String[] list1 = (String[])request.getAttribute("res");
if(null == list1){%>
<%
}else{
for(int i=0; i<list1.length; i++)
{ %>
<tr><%out.println(list1[i] + "<br/>");%></tr>
<% }
}
%>
</table>
所以我怎樣才能得到它的打印作爲通過參數的鏈接的結果
不幸的是,我們是不允許使用JSTL :( – user1393064
然後使用 - > 的(一個String:鏈接){ 的System.out。的println( 「
上。 é問題,它沒有傳遞到URL的身份證,我知道在PHP它確實要傳遞變量是Java一樣嗎? – user1393064