java - Apache Derby示例数据库问题； 'Unable to connect'-6ren

java - Apache Derby示例数据库问题； 'Unable to connect'

转载作者：行者123 更新时间：2023-12-02 09:46:20

我在64位Windows 10 Pro上运行Netbeans 8.02，前几天我发现我无法再访问“示例” Derby数据库。我收到以下错误:

Unable to connect. Cannot establish a connection to jdbc:derby://localhost:1527/sample using org.apache.derby.jdbc.ClientDriver (DERBY SQL error: ERRORCODE: 40000, SQLSTATE:XJ040, SQLERRMC: Failed to start database 'sample' with class loader sun.misc.Launcher$AppClassLoader@60e53b93, see the next exception for details.::SQLSTATE:XSLAM).

Apache Derby正在运行，否则看起来工作正常。使用“示例”数据库的唯一事情是来自本完整教程的应用程序: Enterprise application tutorial

我唯一想到的可能是导致此错误的原因。
提前致谢。

最佳答案

感谢回复。这是我在日志中找到的内容:

        Sat Jan 23 13:30:29 GMT 2016:
    Booting Derby version The Apache Software Foundation 
    - Apache Derby - 10.11.1.2 - (1629631): instancE f67740d7-0152-6ead-        1de3-00003d273097 

    on database directory C:\Users\user\.netbeans-derby\sample with class loader 
    sun.misc.Launcher$AppClassLoader@60e53b93 
    Loaded from file:
    /C:/Program%20Files/Java/jdk1.8.0_40/db/lib/derby.jar
    java.vendor=Oracle Corporation
    java.runtime.version=1.8.0_40-b25
    user.
    dir=C:\Program Files\Java\jdk1.8.0_40\db
    os.name=Windows 8.1
    os.arch=amd64
    os.version=6.3
    derby.system.home=C:\Users\user\.netbeans-derby

    ------------  Begin Shutdown Error Stack -------------

    ERROR XSLA7: Cannot redo operation null in the log.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    ... 36 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= begin nested exception, level (1) ===========
    ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: java.io.EOFException
        at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
        ... 41 more
    ============= end nested exception, level (1) ===========
    ============= begin nested exception, level (2) ===========
    java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    ============= end nested exception, level (2) ===========
    ------------  End Shutdown Error Stack -------------

    ----------------------------------------------------------------
    Sat Jan 23 13:30:29 GMT 2016:
    Shutting down instance f67740d7-0152-6ead-1de3-00003d273097 on database directory C:\Users\user\.netbeans-derby\sample with class loader sun.misc.Launcher$AppClassLoader@60e53b93 
    Sat Jan 23 13:30:29 GMT 2016 Thread[DRDAConnThread_3,5,main] Cleanup action starting
        java.sql.SQLException: Failed to start database 'sample' with class loader sun.misc.Launcher$AppClassLoader@60e53b93, see the next exception for details.
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XJ040: Failed to start database 'sample' with class loader sun.misc.Launcher$AppClassLoader@60e53b93, see the next exception for details.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
    ... 16 more
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    ... 13 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= begin nested exception, level (1) ===========
    java.sql.SQLException: Cannot verify database format at {1} due to IOException: 
    C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
    at org.apache.derby.jdbc.EmbeddedDriver.connect(Unknown Source)
    at org.apache.derby.impl.drda.Database.makeConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.getConnFromDatabaseName(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.verifyUserIdPassword(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseSECCHK(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.parseDRDAConnection(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.processCommands(Unknown Source)
    at org.apache.derby.impl.drda.DRDAConnThread.run(Unknown Source)
    Caused by: ERROR XSLAM: Cannot verify database format at {1} due to IOException: 
    C:\Users\user\.netbeans-derby\sample
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.verifyLogFormat(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtPosition(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.getLogFileAtBeginning(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecordForward(Unknown Source)
    at org.apache.derby.impl.store.raw.log.Scan.getNextRecord(Unknown Source)
    at org.apache.derby.impl.store.raw.log.FileLogger.redo(Unknown Source)
    at org.apache.derby.impl.store.raw.log.LogToFile.recover(Unknown Source)
    at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
    at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
    at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
    ... 13 more
    Caused by: java.io.EOFException
    at java.io.RandomAccessFile.readInt(RandomAccessFile.java:803)
    ... 41 more
    ============= end nested exception, level (1) ===========

关于java - Apache Derby示例数据库问题； 'Unable to connect'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34964341/

文章推荐： junit - derby内存数据库+ junit

文章推荐： java - 如何在FtpMessageHandler中设置目标目录？

文章推荐： java - Heroku 上的 NoSuchElementException 但适用于 localhost

文章推荐： java - 在Raspberry Pi上连接到Apache Derby数据库的问题

derby - Derby “&”无法正常工作
Select distinct APP.bca_cart.InventoryCode,APP.bca_cart.InventoryID,APP.bca_cart.CartID,APP.bca_cart
derby - 在 derby 数据库中更改表添加列之后
有没有办法在 derby 数据库中像 mysql 那样逐列添加？最佳答案我不相信。列排序并不是真正的标准 SQL 功能。编写良好的数据库应用程序不应该关心列排序。您可以通过命名 SQL 语句中的列
derby - 更改 Derby 数据库密码
我已经在 Glassfish/Netbeans 中设置了 Derby DB 密码。我还选中了记住我复选框。现在我不能再更改密码了。最佳答案要更改密码，您只需执行: call SYSCS_UTIL
derby - Apache Derby - 区分大小写
我在 google 上搜索了一些关于 apache derby 中不区分大小写的搜索。所有谷歌搜索结果都非常旧(2007 年最新)。我发现在不丢失索引的情况下搜索不区分大小写是不可能的(“LOWER”
derby - 如何在 Derby 中获取主键和唯一约束列
如何做到这一点？ SYSCOLUMNS 系统表只有表的列。 SYSCHECKS 有一个 REFERENCEDCOLUMNS 对象。有什么办法可以得到这个。我知道 JDBC getPrimaryKey
derby - 是否将粘贴的Apache derby db文件复制到另一个系统中使其工作正常
我已经使用derby db开发了一个应用程序。我已经在系统中创建了数据库。我需要将应用程序与数据库一起交付。我已删除表中的所有数据。仅保留表(数据为空的结构)。因此，如果我将db文件(所有这些文件，l
derby - 在 Derby 中选择前几行的简单方法？
Derby没有rownum功能吗？在oracle中，我可以选择前3行，如下所示。 select * from a where rownum < 3 在here中，他们建议如下。但这很乏味。 SELE
derby - 为嵌入式 Derby 重建索引
我正在使用嵌入式 Java 数据库来保存公交时刻表。当新计划可用时，我会自动将新计划加载到数据库表中，然后从数据库中删除旧计划。这会自动发生，无需用户干预。我注意到数据库会随着时间的推移而变慢。我有
derby - 如何列出 derby 服务器中可用的数据库名称？
假设我已连接到 derby 服务器。我需要知道哪些数据库可供我连接。有命令可以这样做吗？最佳答案没有这样的命令。 Derby 不维护所有已知数据库的整体注册表或目录。每个数据库都是独立的，可以通
node.js - Derby.js - npm install derby 成功，但找不到 derby 命令
我正在关注 Derby.js getting started guide .我跑了 $ npm install -g derby 一切都成功了，但是当我输入 $ derby new app-name
derby - 如何检查 Hsqldb/Derby 中是否存在数据库？
我正在寻找如何检查数据库是否存在的信息——从 Java 代码——在 hsqldb 和 Apache derby 中。在Mysql中很容易，因为我可以查询系统表--INFORMATION_SCHEMA.
derby - 显示 JavaDB (Derby) 数据库可视化模式的免费软件应用程序
我在我的 Mac 上使用 Netbeans 7.1 创建了一个 JavaDB(Derby) 数据库，我正在搜索一个免费软件应用程序，我可以使用它来查看包含所有表及其连接的完整数据库模式的图片。有任何想
java - Derby:另一个 Derby 实例可能已经启动了数据库
我想在网络服务器模式下使用 Derby，并按照他们网站上的说明进行操作。 Derby 开局: /opt/glassfish/4.0/javadb/bin/NetworkServerControl st
derby - 如何使用 SQLDeveloper 连接嵌入式 Derby 数据库
我有一个使用 derby 和 JPA 的项目。我可以在我的应用程序中正常连接到数据库。我想使用 SQL Developer 连接到嵌入式数据库，以便我可以轻松浏览/查询数据库中的数据。这是我正在使用
derby - 在生产模式下使用 Derby 或 HSQL 的经验
关闭。这个问题需要更多focused .它目前不接受答案。想改善这个问题吗？更新问题，使其仅关注一个问题 editing this post . 8年前关闭。 Improve this questi
derby - 如何在 Apache Derby ij 工具中设置查询的结果格式
有没有办法在 ij 中“漂亮地打印”查询结果？由于在查询结果中到处乱扔列，因此默认结果看起来非常难以理解。在 PostgreSQL 中，有/pset 命令来控制 pgsql 命令的结果，我正在为 D
derby - 如何关闭在 WildFly 上正确定义为 DataSource 的嵌入式 Derby
当我在 WildFly 上正常定义 Derby 数据源时，db.lck 文件未被删除，这表明每次关闭 WildFly 时数据库都没有正确关闭。因为嵌入式 Derby 需要一个特殊的关闭过程，该过程正在
Java:Hibernate 和嵌入式 Derby；在其他位置/目录上创建 Derby
我在 Google 上没有找到任何相关信息，但我认为这一定是可能的。我的 Hibernate 项目遇到了一个严重的问题: 我有两个模块，一个主模块和一个工具模块。他们应该使用相同的数据库(嵌入式 D
java - Derby 嵌入式驱动程序错误 XBM02 请确保您的类路径包含正确的 Derby 软件
我正在使用 Spring 构建一个 JavaEE 应用程序，我正在尝试将它与 DerbyEmbeddedDriver 连接起来。该应用程序将在 SAP Hana Cloud Platform 试用版上
derby - 与 Apache Qpid 一起使用时，Apache Derby 将其文件存储在何处？
我正在使用 Derby DB作为我的 Qpid broker 的存储.当作为嵌入式数据库运行时，试图找出 Derby 存储数据文件的位置。任何人都知道文件所在的位置或如何设置要使用的目录？最佳答案

行者123

个人简介

我是一名优秀的程序员,十分优秀！

作者热门文章

滴滴打车优惠券免费领取

全站热门文章

首页

博学

6Ren·AI

商城

java - Apache Derby示例数据库问题； 'Unable to connect'