Java note (2)-connecting to sqlserver through eclipse

The connection code is as follows: Code
Public class test_sqlserver {
Static connection conn = NULL;
Static statement stmt = NULL;
Static resultset rs = NULL;

Private Static Boolean conn_sqlserver (){
Try {
Class. forname ("com. Microsoft. JDBC. sqlserver. sqlserverdriver ")
. Newinstance ();
String url = "JDBC: Microsoft: sqlserver: // localhost: 1433;
Databasename = test ";
String user = "sa ";
String Password = "sa ";
Conn = drivermanager. getconnection (URL, user, password );
Try {
Stmt = conn. createstatement ();
System. out. println ("connection successful! ");
Return true;
}
Catch (SQLException s_e ){
System. out. println ("s_E" + s_e.getMessage (). toString ());
Return false;
}
}
Catch (SQLException s_e ){
System. out. println ("connection error! SQLException "+ s_e.toString ());
Return false;
}
}

Private static void ExeSQL (String SQL, int flag ){
Try {
Long begin_ SQL _Ticks = System. currentTimeMillis ();
Boolean SQL _exe = false;
SQL _exe1_stmt.exe cute (SQL );
Long end_ SQL _ticks = system. currenttimemillis ();
If (SQL _exe ){
// Return results if required
If (flag = 1 ){
Rs = stmt. getresultset ();
Rs. First ();
While (! Rs. islast ()){
System. Out. Print (Rs. getstring (1) + "");
System. Out. Print (Rs. getint (2) + "");
System. Out. Print (Rs. getint (3) + "\ n ");
Rs. Next ();
}
Rs. Last ();
System. Out. Print (Rs. getstring (1) + "");
System. Out. Print (Rs. getint (2) + "");
System. Out. Print (Rs. getint (3) + "\ n ");
Long show_ticks = system. currenttimemillis ();
System. Out. println ("show total time consumption:" + (show_Ticks-end_ SQL _Ticks) + "millisecond ");
}
}
System. Out. println ("SQL statement execution time:" + (end_ SQL _Ticks-begin_ SQL _Ticks) + "millisecond ");
}
Catch (sqlexception s_e ){
System. Out. println (s_e.getmessage ());
}

Install the driver, patch SP4, and connect again. Everything is similar to MySQL. Code
Public static void main (string [] ARGs ){
If (conn_sqlserver ()){
Exesql ("use test;", 2 );
Exesql ("create table test_1 (name varchar (12), age smallint, Id INT)", 2 );
Exesql ("insert into test_1 values ('zs', 21,53535)", 1 );
Exesql ("select * From test_1", 1 );
// ExeSQL ("drop table test_1", 2 );
}

Create a table and insert data. Everything is OK. However, the following error is returned:
[Microsoft] [SQLServer 2000 Driver for JDBC] Unsupported method: ResultSet. first

It seems that JDBC does not support a method-this is a big headache.
Fortunately, after searching, we found that the problem could be solved.
Comprehensive Analysis: parameters included in createStatement () are described as follows:
1. TYPE_FORWORD_ONLY, which can be rolled forward only;
2. TYPE_SCROLL_INSENSITIVE: two-way scrolling, but not timely updating. If the data in the database has been modified, it is not reflected in the ResultSet.
3. TYPE_SCROLL_SENSITIVE, two-way scrolling, and timely tracking of database updates, in order to change the data in the ResultSet.
Therefore, you can solve the problem by changing to createStatement (ResultSet. TYPE_SCROLL_SENSITIVE, ResultSet. CONCUR_UPDATABLE.
Therefore, stmt = conn. createStatement (); is written
Stmt = conn. createStatement (ResultSet. TYPE_SCROLL_SENSITIVE, ResultSet. CONCUR_UPDATABLE); OK.