com.mysql.jdbc.Driver该怎么办？

我得到这个当我尝试推出我们的Java服务器：抛出java.lang.ClassNotFoundException：com.mysql.jdbc.Drivercom.mysql.jdbc.Driver该怎么办？

但我有使用mysql-connector-java的5.1.22-bin.jar在脚本所在的同一个文件夹中，并且在我运行脚本时进行此操作：

java -cp mysql-connector-java-5.1.22-bin.jar -jar AvatarServer.jar

但仍然得到此。该怎么办？我使用的是CentOS服务器。

[email protected] [/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)

来源

2012-12-22 JKMadsen

add mysql-connector-java-5.1.22-bin.jar to class-path in MANIFEST.MF file in AvatarServer.jar。示例：

Class-Path: mysql-connector-java-5.1.22-bin.jar

来源

2012-12-22 16:23:13 Ilya

谢谢，我发现它应该在哪里，并重命名文件等感谢！ – JKMadsen

-jar和-cp是互斥的。 -jar说：类路径是以下jar，并且其清单文件中引用了所有库。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，如果你想与-jar运行你的应用程序，参考MySQL驱动的jar JAR的清单文件，如the jar tutorial解释。

来源

2012-12-22 16:21:54

您的示例不起作用。我不熟悉Java。这是我之前程序员的一个java源代码。我不知道该怎么办。 – JKMadsen

定义“不起作用”。从字面上看，你没有使用类名“com.foo.bar.AvatarMainClass”，是吗？如果是这样，当然，您必须将此类名称替换为您想要启动的实际主类。在jar的清单文件中引用的那个。 –

com.mysql.jdbc.Driver该怎么办？

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