Java 无法从基础数据库获取连接！-HSQL数据库

我正试图通过Gavin King的Hibernate从Java持久性学习Hibernate

我刚刚从这个位置下载了书中给出的例子

我使用ant startdb启动了我的HSQL数据库，数据库成功启动

当尝试运行目标schemaexport时，我得到以下错误

schemaexport:[hibernatetool] 使用 标准配置[hibernatetool] 1.任务：hbm2ddl（生成数据库模式）[hibernatetool]18:07:56555 信息环境：500-Hibernate 3.2.0.cr5[hibernatetool]18:07:56555信息环境：533- hibernate.properties未找到 [hibernatetool]18:07:56555信息 环境：667-字节码提供程序 名称：cg lib[hibernatetool] 18:07:56571信息环境：584- 使用JDK1.4java.sql.Time戳 处理[hibernatetool]18:07:56617 信息配置：1384-配置 来自文件：h ibernate.cfg.xml [hibernatetool]18:07:56680信息 配置：507-读取映射 来自资源：hello/Message.hbm.xml [hibernatetool]18:07:56758信息 HbmBinder:300-映射类： 你好，留言 ->消息[hibernatetool]18:07:56851信息配置：1465 -配置的会话因子y:null[hibernatetool]18:07:56851信息 方言：141-使用方言： org.hibernate.di alect.hsql [hibernatetool]18:07:56914信息 SchemaExport:154-正在运行hbm2ddl 模式扩展端口[hibernatetool] 18:07:56914信息模式导出：174- 正在将生成的架构写入文件： C:\Users\Ramesh\Desktop\Tutorials\hibernate\hibernate 代码示例\jpwh- gettingstarted-070401\helloworld-native\helloworld-ddl.sql [hibernatetool]18:07:56914信息 SchemaExport:179-导出生成的 数据库模式[hibernatetool] 18:07:56914信息 C3P0ConnectionProvider:50-C3P0正在使用 驱动程序：org.hsqldb.jdbcDriver，URL: jdbc:hsqldb:hsql://localhost [hibernatetool]18:07:56914信息 C3P0ConnectionProvider:51-连接 属性：{user=sa}[hibernatetool] 18:07:56914信息 C3P0ConnectionProvider:54-自动提交 模式：false[hibernatetool] 18:08:26554警告 基本资源库：1222- com.mchange.v2.resource rcepool.BasicResourcePool$AcquireTask@61f1680f --获取尝试失败！！！清算未决收购。虽然 试图获得所需的新产品 资源，我们会取得更大的成功 超过允许的最大数量 获取尝试（30）。 [hibernatetool]18:08:26554错误 SchemaExport:202-模式导出 不成功

[hibernatetool]java.sql.SQLException： 无法从中获取连接 底层数据库！ [冬眠醇]在 com.mchange.v2.sql.SqlUtils.toSQLException（SqlUtils.j ava:104）[冬眠醇]at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.che ckoutPooledConnection（C3P0PooledConnectionPool.java:236） [冬眠醇]在 com.mchange.v2.c3p0.PoolBackedDataSource.getConnectio n（PoolBackedDataSource.java:94） [冬眠醇]在 org.hibernate.connection.C3P0ConnectionProvider.getCo 连接（C3P0ConnectionProvider.java:35） [冬眠醇]在 org.hibernate.tool.hbm2ddl.ManagedProviderConnectionH prepare（ManagedProviderConnectionHelper.java:28） [冬眠醇]在 org.hibernate.tool.hbm2ddl.SchemaExport.execute（Schem aExport.java:180）[hibernatetool]
在 org.hibernate.tool.hbm2ddl.SchemaExport.create（Schema Export.java:133）[hibernatetool]
在 org.hibernate.tool.ant.Hbm2DDLExporterTask.execute（Hb m2DDLExporterTask.java:55） [冬眠醇]在 org.hibernate.tool.ant.hibernateTooltTask.execute（Hibe rnateToolTask.java:171） [冬眠醇]在 org.apache.tools.ant.UnknowneElement.execute（UnknownEl ement.java:291）[hibernatetool]
在 sun.reflect.NativeMethodAccessorImpl.invoke0（本机 方法[hibernatetool]at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMet hodAccessorImpl.java:39） [冬眠醇]在 sun.reflect.DelegatingMethodAccessorImpl.invoke（Deleg atingMethodAccessorImpl.java:25） [冬眠醇]在 java.lang.reflect.Method.invoke（Method.java:597） [冬眠醇]在 org.apache.tools.ant.dispatch.DispatchUtils.execute（D java:106）[hibernatetool] 在 org.apache.tools.ant.Task.perform（Task.java:348） [冬眠醇]在 org.apache.tools.ant.Target.execute（Target.java:390） [冬眠醇]在 org.apache.tools.ant.Target.performTasks（Target.java: 411）[冬眠醇]在 org.apache.tools.ant.Project.executeSortedTargets（Pro java:1397）[hibernatetool]
在 org.apache.tools.ant.Project.executeTarget（Project.ja 弗吉尼亚州：1366[冬眠醇]at org.apache.tools.ant.helper.DefaultExecutor.executeTa rgets（DefaultExecutor.java:41） [冬眠醇]在 org.apache.tools.ant.Project.executeTargets（Project.j ava:1249[hibernatetool]at org.apache.tools.ant.Main.runBuild（Main.java:801） [冬眠醇]在 org.apache.tools.ant.Main.startAnt（Main.java:218） [冬眠醇]在 org.apache.tools.ant.launch.Launcher.run（Launcher.jav a:280[冬眠醇]在 org.apache.tools.ant.launch.Launcher.main（Launcher.ja va:109）[冬眠醇]由以下原因引起： com.mchange.v2.resourcepool.cannotacquireResourceExchange 选项：资源池无法启动 从其主服务器获取资源 工厂或供应商。[冬眠醇]
在 com.mchange.v2.resourcepool.BasicResourcePool.awaitAc quire（BasicResourcePool.java:970） [冬眠醇]在 com.mchange.v2.resourcepool.BasicResourcePool.checkou tResource（BasicResourcePool.java:208） [冬眠醇]在 com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.che ckoutPooledConnection（C3P0PooledConnectionPool.java:232） [冬眠醇]

<!-- Start the HSQL DB server -->
<target name="startdb" description="Run HSQL database server with clean DB">
    <!-- Delete database files -->
    <delete dir="${database.dir}"/>
    <java classname="org.hsqldb.Server"
          fork="yes"
          classpathref="project.classpath"
          failonerror="true">
        <arg value="-database.0"/>
        <arg value="file:${database.dir}/db"/>
    </java>
</target>

startdb:
     [delete] Deleting directory C:\Users\Ramesh\Desktop\Tutorials\hibernate\Hibernate Code samples\jpwh-gettingstarted-070401\helloworld-native\database
     [java] [Server@15ded0fd]: [Thread[main,5,main]]: checkRunning(false) entered
     [java] [Server@15ded0fd]: [Thread[main,5,main]]: checkRunning(false) exited

     [java] [Server@15ded0fd]: Startup sequence initiated from main() method
     [java] [Server@15ded0fd]: Loaded properties from [C:\Users\Ramesh\Desktop\Tutorials hibernate\Hibernate Code samples\jpwh-gettingstarted-070401\helloworld-native\server.properties]
     [java] [Server@15ded0fd]: Initiating startup sequence...
     [java] [Server@15ded0fd]: Server socket opened successfully in 29 ms.
     [java] [Server@15ded0fd]: Database [index=0, id=0, db=file:database/db, alias=] opened sucessfully in 469 ms.
     [java] [Server@15ded0fd]: Startup sequence completed in 523 ms.
     [java] [Server@15ded0fd]: 2010-11-08 22:11:08.027 HSQLDB server 1.8.0 is online
     [java] [Server@15ded0fd]: To close normally, connect and execute SHUTDOWN SQL
     [java] [Server@15ded0fd]: From command line, use [Ctrl]+[C] to abort abruptly

$ ant startdb 
Buildfile: /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build.xml

startdb:
     [java] [Server@a97b0b]: [Thread[main,5,main]]: checkRunning(false) entered
     [java] [Server@a97b0b]: [Thread[main,5,main]]: checkRunning(false) exited
     [java] [Server@a97b0b]: Startup sequence initiated from main() method
     [java] [Server@a97b0b]: Loaded properties from [/home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/server.properties]
     [java] [Server@a97b0b]: Initiating startup sequence...
     [java] [Server@a97b0b]: Server socket opened successfully in 39 ms.
     [java] [Server@a97b0b]: Database [index=0, id=0, db=file:database/db, alias=] opened sucessfully in 1148 ms.
     [java] [Server@a97b0b]: Startup sequence completed in 1281 ms.
     [java] [Server@a97b0b]: 2010-11-08 18:29:20.094 HSQLDB server 1.8.0 is online
     [java] [Server@a97b0b]: To close normally, connect and execute SHUTDOWN SQL
     [java] [Server@a97b0b]: From command line, use [Ctrl]+[C] to abort abruptly

$ ant schemaexport 
Buildfile: /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build.xml

compile:
    [mkdir] Created dir: /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build
    [javac] /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build.xml:39: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 3 source files to /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build

copymetafiles:
     [copy] Copying 3 files to /home/pascal/Projects/jpwh-gettingstarted-070401/helloworld-native/build

schemaexport:
[hibernatetool] Executing Hibernate Tool with a Standard Configuration
[hibernatetool] 1. task: hbm2ddl (Generates database schema)
[hibernatetool] 
[hibernatetool]     alter table MESSAGES 
[hibernatetool]         drop constraint FK_NEXT_MESSAGE;
[hibernatetool] 
[hibernatetool]     drop table MESSAGES if exists;
[hibernatetool] 
[hibernatetool]     create table MESSAGES (
[hibernatetool]         MESSAGE_ID bigint generated by default as identity (start with 1),
[hibernatetool]         MESSAGE_TEXT varchar(255),
[hibernatetool]         NEXT_MESSAGE_ID bigint,
[hibernatetool]         primary key (MESSAGE_ID)
[hibernatetool]     );
[hibernatetool] 
[hibernatetool]     alter table MESSAGES 
[hibernatetool]         add constraint FK_NEXT_MESSAGE 
[hibernatetool]         foreign key (NEXT_MESSAGE_ID) 
[hibernatetool]         references MESSAGES;
[hibernatetool] 1 errors occurred while performing <hbm2ddl>.
[hibernatetool] Error #1: java.sql.SQLException: Table not found: MESSAGES in statement [alter table MESSAGES]

BUILD SUCCESSFUL
Total time: 14 seconds

$ java -cp lib/hsqldb.jar org.hsqldb.Server