com.mysql.jdbc.Driver該怎麼辦？

我得到這個當我嘗試推出我們的Java服務器：拋出java.lang.ClassNotFoundException：com.mysql.jdbc.Drivercom.mysql.jdbc.Driver該怎麼辦？

但我有使用mysql-connector-java的5.1.22-bin.jar在腳本所在的同一個文件夾中，並且在我運行腳本時進行此操作：

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

但仍然得到此。該怎麼辦？我使用的是CentOS服務器。

[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)

來源

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

來源

2012-12-22 16:23:13 Ilya

謝謝，我發現它應該在哪裏，並重命名文件等感謝！ – JKMadsen

-jar和-cp是互斥的。 -jar說：類路徑是以下jar，並且其清單文件中引用了所有庫。所以，你必須使用：

java -cp mysql-connector-java-5.1.22-bin.jar;AvatarServer.jar com.foo.bar.AvatarMainClass

，或者，如果你想與-jar運行你的應用程序，參考MySQL驅動的jar JAR的清單文件，如the jar tutorial解釋。

來源

2012-12-22 16:21:54

您的示例不起作用。我不熟悉Java。這是我之前程序員的一個java源代碼。我不知道該怎麼辦。 – JKMadsen

定義「不起作用」。從字面上看，你沒有使用類名「com.foo.bar.AvatarMainClass」，是嗎？如果是這樣，當然，您必須將此類名稱替換爲您想要啓動的實際主類。在jar的清單文件中引用的那個。 –

com.mysql.jdbc.Driver該怎麼辦？

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