请问为什么这断运用jdbc的代码无法修改数据库？

import java.sql.*;

public class Test1 {
public static void main111(String[] args) throws Exception{
//1加载驱动
Class.forName("com.mysql.jdbc.Driver");

    //2构建数据库连接
    Connection conn=DriverManager.getConnection("jdbc:mysql:" +
            "//110.65.81.150:3306/jn?characterEnconding=GBK",
            "root","123456");

    //3构建执行语句
    Statement state=conn.createStatement();
    String sql="update xs set xingming='ZhangSan' where xuehao=2 ";
    state.execute(sql);
    conn.close();
}

}

ip改为localhost试试，要不就是jdk版本太高了

用最新的mysql的jdbc包试试