[英]i'm trying to bind data from database using javascript ajax function but it didn't work
[英]pass parameter from servlet to function javascript , it didn't work when view database?
我有查看servlet的視圖,它在數據庫中查看用戶,在表中查看用戶的每一行,我們都具有將該行的單元格更改為文本框的按鈕,任何方式::我遇到的問題數據並進行for循環以查看每行內的表,我已經打印了一個更新按鈕,並將其附加到javascript函數THE IMPORTANT POINT上以傳遞此動態Row的ID,在運行代碼時沒有任何反應表明有問題! !
這是視圖servlet的代碼
@SuppressWarnings("serial")
公共類View擴展HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
out.println("<html> <head>");
out.println("<script type='text/javascript'>");
out.println("function show_textBOX(i){");
out.println("alert(\"update these users -- \"+i+ \" -- \")");
out.println(" document.getElementById(i).innerHTML ='f';");
out.println("}");
out.println("</script>");
out.println(" </head> <body>");
PersistenceManager pm = PMF.get().getPersistenceManager();
Query query = pm.newQuery("select from " + User.class.getName());
List<User> list = (List<User>) query.execute();
resp.getWriter().println("<form method='' action='' name='formMY'>");
resp.getWriter()
.println(
" <table border = '1'> <caption><h4>all users </h4></caption> ");
resp.getWriter()
.println(
"</br> <h2> <tr> "
+ "<td> "
+ " USERname "
+ "</td> <td> Salary "
+ " </td> <td>BirthDate "
+ " </td> <td> Modification1 </td> <td> Modification2 </td> </tr></h2>");
int i = 1;
for (User obj : list) {
DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
String today = formatter.format(obj.getDate());
resp.getWriter()
.println(
"</br> <tr id='"
+ i
+ "'> <td>"
+ obj.getName()
+ " </td> <td> "
+ obj.getSalary()
+ "</td> "
+ " <td> "
+ today
+ "</td>"
+ " <td>"
+ " <input type=button value='Update' onclick()='show_textBOX("
+ i + ")'>" + " </td> <td>"
+ " <input type=button value='DELETE' >"
+ " </td>" + " </tr>");
i++;
}
resp.getWriter().println("</table> </form>");
resp.getWriter().println("</body> </html> ");
您可以使用此簡單的javascript函數
function submitform(obj,action){
act = document.getElementById("act");
act.value = action;
obj.submit();
}
你會打電話給
" <td><input type=button value='Update' onclick()='submitform(this.form,"+i+")'></td>"
哪一個
this.form
調用相同的表單,然后它將操作參數傳遞給ur servlet,您將從中處理它
req.getParameter("action")
注意:我沒有測試它,因為我的JDEVELOPER不起作用:(
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