我在初始化我的javadb網絡服務器並設置連接時遇到問題。這是一個JavaFX程序。連接到Derby網絡服務器時未找到數據庫錯誤
這是我到目前爲止有:
try {
Class.forName("org.apache.derby.jdbc.ClientDriver").newInstance();
javadbserver = new NetworkServerControl();
javadbserver.start(null);
} catch (ClassNotFoundException e) {
Logger.getLogger(MainGuiController.class.getName()).log(Level.SEVERE, null, ex);
System.out.println("Where is your JavaDB embedded Driver?");
return;
}
String dbName = "mydb";
String dbUser = "auser";
String dbPass = "password";
PreparedStatement prepstmt;
try {
this.conn = DriverManager.getConnection("jdbc:derby://localhost:1527/mydb;user=auser;password=password");
System.out.println("Went through!");
} catch (SQLException ex) {
Logger.getLogger(MainGuiController.class.getName()).log(Level.SEVERE, null, ex);
}
我總是趕在第二個例外。
如果我右鍵單擊netbeans中的javadb服務並選擇連接,則一切運行順利。 [其實這會是不錯的知道什麼樣的代碼或程序的Java在後臺運行,當我選擇]
在我的項目列表下的圖書館我看到的derby.jar,derbyclient.jar中和derbynet.jar
我究竟做錯了什麼?請幫忙!
這裏的錯誤,我得到
java.sql.SQLNonTransientConnectionException: The connection was refused because the database mydb was not found.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.jdbc.ClientDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:579)
at java.sql.DriverManager.getConnection(DriverManager.java:243)
at mydb.MainGuiController.initialize(MainGuiController.java:105)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2152)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2028)
at mydb.mydb.start(mydb.java:37)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:215)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.derby.client.am.DisconnectException: The connection was refused because the database mydb was not found.
at org.apache.derby.client.net.NetConnectionReply.parseRDBNFNRM(Unknown Source)
at org.apache.derby.client.net.NetConnectionReply.parseAccessRdbError(Unknown Source)
at org.apache.derby.client.net.NetConnectionReply.parseACCRDBreply(Unknown Source)
at org.apache.derby.client.net.NetConnectionReply.readAccessDatabase(Unknown Source)
at org.apache.derby.client.net.NetConnection.readSecurityCheckAndAccessRdb(Unknown Source)
at org.apache.derby.client.net.NetConnection.flowSecurityCheckAndAccessRdb(Unknown Source)
at org.apache.derby.client.net.NetConnection.flowUSRIDPWDconnect(Unknown Source)
at org.apache.derby.client.net.NetConnection.flowConnect(Unknown Source)
at org.apache.derby.client.net.NetConnection.<init>(Unknown Source)
at org.apache.derby.client.net.NetConnection40.<init>(Unknown Source)
at org.apache.derby.client.net.ClientJDBCObjectFactoryImpl40.newNetConnection(Unknown Source)
你只是在吞嚥異常!至少打印一個堆棧跟蹤如果你不打算處理或「鴨子」它。一旦你得到堆棧跟蹤,但仍然不確定發生了什麼,請將其包含在你的問題中。 – ikumen
是的。我有多愚蠢。問題編輯 –