在CentOS服务器上运行一个java代码来连接mysql

我的代码是 -

String server = "", url = "", password = "", user = "", databasename = "";

Connection con = null;

try {

server = "xxx.xxx.xxx.xxx";

databasename = "xx";

user = "user";

password = "pass";

Class.forName("com.mysql.jdbc.Driver");

url = "jdbc:mysql://" + server + "/" + databasename + "";

con = DriverManager.getConnection(url, user, password);

System.out.println(server + " Database connection established");

System.out.println(con);

} catch (Exception e) {

System.out.println("***************connection failed********************");

e.printStackTrace();

}我的数据库运行在同一台服务器上。

我在我的本地系统和其他服务器上运行这个代码以获得相同的数据库，并且它的运行正常，但是它不在我的数据库可用的相同服务器上运行。

我得到这个例外 -

com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '??????????????' at line 1

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1027)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3361)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3295)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1852)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1975)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2470)

at com.mysql.jdbc.ConnectionImpl.configureClientCharacterSet(ConnectionImpl.java:1669)

at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3336)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1979)

at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:718)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:287)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:283)

at java.sql.DriverManager.getConnection(libgcj.so.10)

at java.sql.DriverManager.getConnection(libgcj.so.10)

at testthread.ConnectionFactory.getConnection(ConnectionFactory.java:28)

at testthread.ConnectionFactory.main(ConnectionFactory.java:39)是任何一个帮助我什么问题。