我是新来的java,我试图创建一个方法,将从数据库检索信息基于查询将传递给它。Java和SQL Server
我以为我可以通过方法通过创建类型的对象:
private Connection controlTableConnection = null;
然后
Statement statement = controlTableConnection.createStatement();
,但是当我这样做,一段代码,我得到一个亮点错误: 未处理的异常
任何帮助,将不胜感激。
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class ConnectMSSQLServer {
private static final String db_connect_string = "jdbc:sqlserver://Cdsx\\SQxxs";
private static final String db_userid = "aa";
private static final String db_password = "bb";
private Connection controlTableConnection = null;
public void dbConnect() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection controlTableConnection = DriverManager.getConnection(db_connect_string, db_userid, db_password);
} catch (Exception e) {
e.printStackTrace();
}
}
public void dbDisconnect() {
try {
if (controlTableConnection != null && !controlTableConnection.isClosed()) {
controlTableConnection.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
public void createstatement() {
Statement statement = controlTableConnection.createStatement();
}
}