一键端出现这个怎么解决
X:\M\冒险岛\冒险岛online\Bugger>color B
X:\M\冒险岛\冒险岛online\Bugger>com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransien
tConnectionException: Could not create connection to database server. Attempted
reconnect 3 times. Giving up.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.Util.getInstance(Util.java:384)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:929)
at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:
2226)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2127)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:774)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:375)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java
:289)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at database.DatabaseConnection.connectToDB(DatabaseConnection.java:111)
at database.DatabaseConnection.getConnection(DatabaseConnection.java:45)
at server.ServerProperties.<clinit>(ServerProperties.java:191)
at server.Start.run(Start.java:55)
at server.Start.main(Start.java:187)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communicatio
ns link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driv
er has not received any packets from the server.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1
118)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:343)
at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:
2168)
... 17 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.ja
va:256)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:292)
... 18 more
Exception in thread "main" java.lang.ExceptionInInitializerError
at server.Start.run(Start.java:55)
at server.Start.main(Start.java:187)
Caused by: java.lang.NullPointerException
at server.ServerProperties.<clinit>(ServerProperties.java:191)
... 2 more
请按任意键继续. . . 同求，一样的问题卡了我好多天了
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