package package10;

import java.sql.*;

public class Conn {

 private Connection con;
 
 public Connection getConnection() {
  try {
//   Class.forName("com.mysql.jdbc.Driver");
   Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
   System.out.println("数据库驱动加载成功！");
  } catch (ClassNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  try {
//   con = DriverManager.getConnection("jdbc:mysql:" + "//127.0.0.1:3306/sys?useSSL=true", "root", "111111");
   con = DriverManager.getConnection("jdbc:sqlserver://127.0.0.1:1433;DatabaseName=test", "sa", "111111");
   System.out.println(con + "数据库连接成功！");
  } catch (SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  return con;
 }
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  Conn con = new Conn();
  con.getConnection();
 }

}

运行结果如下：

数据库驱动加载成功！
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/DatatypeConverter
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.sendLogon(SQLServerConnection.java:4098)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.logon(SQLServerConnection.java:3160)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.access$100(SQLServerConnection.java:43)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection$LogonCommand.doExecute(SQLServerConnection.java:3123)
 at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7505)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:2445)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1981)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1628)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1459)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:773)
 at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1168)
 at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:678)
 at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:229)
 at package10.Conn.getConnection(Conn.java:21)
 at package10.Conn.main(Conn.java:33)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.DatatypeConverter
 at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
 at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
 at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
 ... 15 more

这是什么问题？