我是GWT的新手。我想我的Oracle10g
數據庫連接到GWT服務器程序,我使用這個代碼 :如何將GWT連接到Oracle數據庫
public class Database_connect
{
public static void connect()
{
System.out.println("This is a test project");
Connection con=null;
try
{
Class.forName("oracle.jdbc.OracleDriver");
System.out.println("Oracle JDBC driver loaded ok.");
con=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:XE","naren", "naren");
System.out.println("Connected with @localhost:1521:XE.");
System.out.println("We have done it successfully");
}
catch(Exception e)
{
System.out.println(e);
}
}
}
在服務器上的文件我打電話connect()
功能
public class GreetingServiceImpl extends RemoteServiceServlet implements GreetingService
{
public String greetServer(String input) throws IllegalArgumentException
{
Database_connect.connect();
}
}
但它的示值誤差。
我不知道現在該做什麼。任何人都幫助我。感謝您的提前。
誤差
[WARN] failed [email protected]
java.net.BindException: Address already in use: bind
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Unknown Source)
at sun.nio.ch.Net.bind(Unknown Source)
at sun.nio.ch.ServerSocketChannelImpl.bind(Unknown Source)
at sun.nio.ch.ServerSocketAdaptor.bind(Unknown Source)
at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:205)
at org.mortbay.jetty.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:304)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.Server.doStart(Server.java:233)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1093)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:836)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)
[ERROR] shell failed in doStartupServer method
我建議展示錯過了這個問題。我不清楚你想做什麼,但我肯定這不是要走的路。您不應該以這種方式將連接代碼硬連接到Java源代碼中。讓應用程序服務器處理這些連接參數並抽象數據源更爲典型。 – duffymo
未檢查的異常永遠不會寫入'throws'。 –
,但該行正在工作,當我做別的事情而不是Database_connect.connect();函數調用 – NareN