Get the database auto-generated primary key value

Package COM.ATGUIGU.JDBC;

Import java.sql.Connection;
Import Java.sql.Date;
Import java.sql.PreparedStatement;
Import Java.sql.ResultSet;
Import Java.sql.ResultSetMetaData;
Import java.sql.Statement;

Import Org.junit.Test;

public class Jdbctest {
/**
* Get the database auto-generated primary key value
*/
@Test
public void Testgetkeyvalue () {
Connection Connection=null;
PreparedStatement Preparedstatement=null;
try{
Connection=jdbctools.getconnection ();
String sql= "INSERT into Customers (Name,email,birth) VALUES (?,?,?)";

Preparedstatement=connection.preparestatement (SQL,);
Use overloaded preparestatement (Sql,flag) to generate PreparedStatement objects
Preparedstatement=connection.preparestatement (SQL, Statement.return_generated_keys);

Preparedstatement.setstring (1, "Chai Yuxia");
Preparedstatement.setstring (2, "[email protected]");
Preparedstatement.setdate (3, New Date (New Java.util.Date (). GetTime ()));
Preparedstatement.executeupdate ();
Get the Resutlset object that contains the new primary key by using. Getgeneratedkeys ()

There is only one column of Generated_dey in resultset to hold the newly generated primary key value
ResultSet Rs=preparedstatement.getgeneratedkeys ();
if (Rs.next ()) {
System.out.println (Rs.getobject (1));
}
ResultSetMetaData Resultsetmetadata=rs.getmetadata ();
for (int i=0;i<resultsetmetadata.getcolumncount (); i++) {
System.out.println (Resultsetmetadata.getcolumnname (i+1));
}
}catch (Exception e) {
E.printstacktrace ();
}finally{
Jdbctools.release (NULL, PreparedStatement, connection);
}
}

}

Get the database auto-generated primary key value