com.mysql.jdbc.Driver怎么办？
当我尝试启动我们的java服务器时，我得到了这个：java.lang.ClassNotFoundException：com.mysql.jdbc.Driver
但我在脚本所在的同一文件夹中有mysql-connector-java-5.1.22-bin.jar，并在运行脚本时进行此操作：
java -cp mysql-connector-java-5.1.22-bin.jar -jar AvatarServer.jar 但仍然得到这个。 该怎么办？ 我使用的是CentOS服务器。
root@host [/home/nagoom/Server_Example]# java -cp mysql-connector-java-5.1.22-bin.jar -jar AvatarServer.jar ************************ ** FIRING UP SERVER! ** ************************ Running MySQLChatMessageSaver java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at items.ItemsDatabase.DownloadData(ItemsDatabase.java:35) at items.ItemsDatabase.InitializeData(ItemsDatabase.java:24) at network.SocketHandler.startListening(SocketHandler.java:84) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at gameInstances.RoomController.DownloadRoomData(RoomController.java:46) at gameInstances.RoomController.InitializeRooms(RoomController.java:32) at network.SocketHandler.startListening(SocketHandler.java:85) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at gameInstances.RoomController.LoadLockedSeatsForAll(RoomController.java:121) at gameInstances.RoomController.InitializeRooms(RoomController.java:33) at network.SocketHandler.startListening(SocketHandler.java:85) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at gameInstances.RoomController.DownloadApartmentData(RoomController.java:89) at gameInstances.RoomController.InitializeRooms(RoomController.java:34) at network.SocketHandler.startListening(SocketHandler.java:85) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at gameInstances.RoomController.LoadItemsForAllRooms(RoomController.java:160) at gameInstances.RoomController.InitializeRooms(RoomController.java:35) at network.SocketHandler.startListening(SocketHandler.java:85) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at clothes.ClothesDatabase.DownloadGraphicsData(ClothesDatabase.java:42) at clothes.ClothesDatabase.InitializeGraphics(ClothesDatabase.java:31) at network.SocketHandler.startListening(SocketHandler.java:86) at server.AvatarServer.run(AvatarServer.java:44) MySQL exception: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver MySQL exception: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at moods.MoodsDatabase.DownloadData(MoodsDatabase.java:29) at moods.MoodsDatabase.InitializeData(MoodsDatabase.java:16) at network.SocketHandler.startListening(SocketHandler.java:89) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at robots.RobotHandler.downloadBots(RobotHandler.java:31) at network.SocketHandler.startListening(SocketHandler.java:90) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at levels.LevelDatabase.DownloadData(LevelDatabase.java:21) at network.SocketHandler.startListening(SocketHandler.java:91) at server.AvatarServer.run(AvatarServer.java:44) java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at database.DatabaseConnection.connect(DatabaseConnection.java:13) at network.SocketHandler.resetOnlineStatuses(SocketHandler.java:172) at network.SocketHandler.startListening(SocketHandler.java:93) at server.AvatarServer.run(AvatarServer.java:44)
将mysql-connector-java-5.1.22-bin.jar到mysql-connector-java-5.1.22-bin.jar中MANIFEST.MF文件中的类路径。 例：
Class-Path: mysql-connector-java-5.1.22-bin.jar
-jar和-cp是互斥的。 -jar说：classpath是以下jar，以及其manifest文件中引用的所有库。 所以你必须使用：
java -cp mysql-connector-java-5.1.22-bin.jar;AvatarServer.jar com.foo.bar.AvatarMainClass
或者，如果您想使用-jar运行您的应用程序，请参阅jar的清单文件中的mysql驱动程序jar，如jar教程中所述 。