Urgent preparestatement issue

Question

Hi
i am trying to update the single record based on my requirement. here my requirement is i have 2 fields in page like userid,username and 3 fields in database userid,username and end_date of xx_user table . when i enter the data and click the apply button save this records into database along with i want to update end_date record in database. for that i used prepare statement to update the record. here records are saving success fully, but end_date record is not updated according to my requirement. i used below code.
if(pageContext.getParameter("Apply")!=null)
String username=pageContext.getParameter("username");
String s="update xx_user set END_DATE=trunc(SYSDATE+13) where user_name='"+username+"'";
try
PreparedStatement ps=am.getOADBTransaction().getJdbcConnection().prepareStatement(s);
int update=ps.executeUpdate(s);
if(update>0)
System.out.println("update Sucessfull");
else
System.out.println("update UnSucessfull");
catch(Exception e)
System.out.println(e);
am.getOADBTransaction().commit();
here i am not facing any errors. let me know is any thing wrong in mycode and any any thing i have to add in my code. please can any any one solve the issue.
Thanks in advance.

Answer 1

Please note the code snippet below:
String username=pageContext.getParameter("username");
//Have a bind parameter in your string
String s="update xx_user set END_DATE=trunc(SYSDATE+13) where user_name=:1";
try
PreparedStatement ps=am.getOADBTransaction().getJdbcConnection().prepareStatement(s);
//Bind the bind parameter and execute the prepared statement.
ps.setString(1,username);
int update=ps.executeUpdate(s);
if(update>0)
System.out.println("update Sucessfull");
else
System.out.println("update UnSucessfull");
}