fixed pg connection

data/2.Java中阶/2.使用JDBC操作数据库/2.数据库操作/PSQLConnection.md

@@ -13,7 +13,7 @@ import java.sql.SQLException;
 import java.sql.Statement;
 
 public class PSQLConnection {
-    public static void main(String[] args) throws ClassNotFoundException, SQLException {
+    public static void main(String[] args) {
         Connection conn = null;
         try {
             Class.forName("org.postgresql.Driver");