在IntelliJ中爲SQL SERVER 2008設置數據源時出現NullPointerException

Question

我試圖在使用sqljdbc4的SQL SERVER 2008的Intellij中設置數據源，並收到java.lang.NullPointerException的錯誤窗口。

網址，我想： jdbc:sqlserver://localhost\.:1433;databaseName=mobitrack jdbc:sqlserver://localhost:1433;databaseName=mobitrack 但相同的結果。

關於什麼可能導致異常的任何想法？

預先感謝您。

這裏是例外的截圖： http://i.imgur.com/idIwYqP.png

idea.log：

2013-03-22 17:13:12,770 [7171087] INFO - ution.rmi.RemoteProcessSupport - "c:\program files\jetbrains\intellij idea 11.0\jre\jre\bin\java" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 11.0\plugins\DatabaseSupport\lib\jdbc-console.jar;C:\Program Files\JetBrains\IntelliJ IDEA 11.0\lib\util.jar;C:\Program Files\JetBrains\IntelliJ IDEA 11.0\lib\annotations.jar;D:\sqljdbc4-4.0.2206.100.jar" com.intellij.persistence.database.console.RemoteJdbcServer com.microsoft.sqlserver.jdbc.SQLServerDriver 
2013-03-22 17:13:13,532 [7171849] INFO - ution.rmi.RemoteProcessSupport - Port/ID:30598/RemoteDriverImple39ef7c1 
2013-03-22 17:13:14,333 [7172650] ERROR - j.javaee.dataSource.DataSource - null 
java.lang.NullPointerException 
    at com.intellij.javaee.dataSource.DatabaseSchemaLoader.getSchemasToLoad(DatabaseSchemaLoader.java:77) 
    at com.intellij.javaee.dataSource.DataSource$1.perform(DataSource.java:324) 
    at com.intellij.javaee.dataSource.DataSource$1.perform(DataSource.java:317) 
    at com.intellij.javaee.dataSource.DataSource.performJdbcOperation(DataSource.java:257) 
    at com.intellij.javaee.dataSource.DataSource.refreshMetaData(DataSource.java:317) 
    at com.intellij.javaee.module.view.dataSource.DataSourceUiUtil$4.run(DataSourceUiUtil.java:138) 
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:457) 
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$5.run(ProgressManagerImpl.java:276) 
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:178) 
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:206) 
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:169) 
    at com.intellij.openapi.application.impl.ApplicationImpl$8$1.run(ApplicationImpl.java:617) 
    at com.intellij.openapi.application.impl.ApplicationImpl$6.run(ApplicationImpl.java:410) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) 
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:662) 
    at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:135) 
2013-03-22 17:13:14,334 [7172651] ERROR - j.javaee.dataSource.DataSource - IntelliJ IDEA 11.0 Build #IU-111.69 
2013-03-22 17:13:14,334 [7172651] ERROR - j.javaee.dataSource.DataSource - JDK: 1.6.0_29 
2013-03-22 17:13:14,334 [7172651] ERROR - j.javaee.dataSource.DataSource - VM: Java HotSpot(TM) Client VM 
2013-03-22 17:13:14,334 [7172651] ERROR - j.javaee.dataSource.DataSource - Vendor: Sun Microsystems Inc. 
2013-03-22 17:13:14,335 [7172652] ERROR - j.javaee.dataSource.DataSource - OS: Windows 7 
2013-03-22 17:13:14,353 [7172670] INFO - ution.rmi.RemoteProcessSupport - Process finished with exit code 1 

Answer 1

是的，網址是不正確的。試試這個：

jdbc:sqlserver://localhost:1433;databaseName=mobitrack 

首先要做的是：SQL Server偵聽器是否在1433端口上偵聽並偵聽？

打開命令shell並鍵入netstat -a。如果在端口1433上看不到LISTENING，則Java將無法連接。

NullPointerException並不意味着你沒有連接。我敢打賭，別的是錯的。

打印堆棧跟蹤。它告訴你有一個空引用的文件和行號。在調試器中瀏覽一下，看看是什麼和爲什麼。

我不知道你從哪裏得到JDBC驅動程序JAR，但是我用於SQL Server的名稱是sqljdbc.jar。嘗試更新驅動程序JAR並查看是否有幫助。

我可以用IntelliJ做到這一點，所以你也可以。