NullPointerException JEE JSF
salut
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
package com.intervention.jsf.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.intervention.jsf.util.DbConn;
public class LoginDAO {
public static String validate(String user, String password) throws SQLException {
Connection con = null;
PreparedStatement ps = null;
String type="Undefined";
con = DbConn.connexion();
ps = con.prepareStatement("Select LOGIN, PASSWORD,type from INTERVENANT where LOGIN = ? and PASSWORD = ?");
ps.setString(1, user);
ps.setString(2, password);
ResultSet rs = ps.executeQuery();
if (rs.next()) {
type=rs.getString(3);
return type;
}
// hna mli makaykonch chi user type tatkon null att nchofo blan
if(type == "Undefined")
return "fail";
return type;
}
} |
et
Code:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
public String validateUsernamePassword() throws SQLException {
String test=null;
String valid = LoginDAO.validate(login, password);
if (valid.equals("admin")) {
HttpSession session = SessionBean.getSession();
session.setAttribute("username", login);
test="admin";
} else if (valid.equals("intervenant")) {
HttpSession session = SessionBean.getSession();
session.setAttribute("username", login);
test= "intervenant";
}
else if(valid.equals("false")) {
HttpSession session = SessionBean.getSession();
session.setAttribute("username", login);
test= "fail";
}
return test; |
l'erreur dis que ca viens de ces deux classes ci-dessus
Code:
1
2
3
4
5
6
7
8
9
10
11
12
|
Caused by: java.lang.NullPointerException
at com.intervention.jsf.dao.LoginDAO.validate(LoginDAO.java:18)
at com.intervention.jsf.beans.intervenant.validateUsernamePassword(intervenant.java:55)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.el.parser.AstValue.invoke(AstValue.java:289)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87) |
aider moi svp
