modification des données d'une table
salut , j'essai de modifier les donné d'une table, voila le code:
import java.awt.TextField;
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class First_serv2 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
Connection cnt=null;
Statement st=null,st1=null;
PreparedStatement pst=null;
ResultSet rst=null;
response.setContentType("text/html");
PrintWriter out = response.getWriter();
BufferedReader lineReader = new BufferedReader(new InputStreamReader(System.in));
out.println("<html>");
out.println("<head>");
out.println("<title>Multiplication</title>");
out.println("</head>");
out.println("<body>");
String var;
var=request.getParameter("txt");
out.print(var);
try
{ String url = "jdbc:odbc:db1";
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
Class.forName(driver).newInstance();
cnt = DriverManager.getConnection(url, "", "");
st=cnt.createStatement();
pst=cnt.prepareStatement("select * from etudiant where num=?");
pst.setString(1,var);
rst=pst.executeQuery() ;
while(rst.next())
{
out.print("<form name=frm3 method='get' action='First_serv2'>");
out.print("numéro etudiant :<input type='text' name='numtxt' value="+rst.getInt(1)+">");
out.print("<br>");
out.print("cne etudiant :<input type=text name='cnetxt' value="+rst.getInt(2)+">");
out.print("<br>");
out.print("nom etudiant :<input type=text name='nomtxt' value="+rst.getString(3)+">");
out.print("<br>");
out.print("prenom etudiant :<input type=text name='prenomtxt' value="+rst.getString(4)+">");
out.print(" <input type='submit' name='btmodif' value='modifier'>");
out.print("</form>");
}
String numtxt;
numtxt=request.getParameter("numtxt");
String cnetxt;
cnetxt=request.getParameter("cnetxt");
String nomtxt;
nomtxt=request.getParameter("nomtxt");
String prenomtxt;
prenomtxt=request.getParameter("prenomtxt");
pst = cnt.prepareStatement("UPDATE etudiant SET cne = ? " + "and nom= ? " + "and prenom= ? " + "WHERE num= ? ");
pst.setString(1,cnetxt);
pst.setString(2,nomtxt);
pst.setString(3,prenomtxt);
pst.setString(4,numtxt);
pst.execute();
cnt.close();
}
catch(Exception e)
{
out.print("Error: " + e);
}
out.print("");
out.print("");
out.print("");
out.println("</body>");
out.println("</html>");
}
}
lorsque je click qur le bouton modifier , rien ne m'arache,et pourtant il ne m'affiche pas un message d'erreur
merci pr votre aide.
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