登录
当前位置： 首页 > 知识库问答 >
问题：

Spring、Hibernate和嵌入式derby-Jetty自动重新部署DB连接问题

端木骞尧
2023-03-14

我正在运行一个带有嵌入式derby Db的spring hibernate应用程序，并在jetty上通过自动重新部署运行它。现在，在执行自动重新部署时，我遇到了一个DB连接错误：

[INFO] restarting o.e.j.m.p.JettyWebAppContext@2f7a6e0e{/,file:/D:/aa/branches/dev/saas/src/main/webapp/,AVAILABLE}{file:/D:/aa/branches/dev/saas/src/main/webapp/}
2016-05-10 11:57:40.932:INFO:/:Scanner-0: Destroying Spring FrameworkServlet 'mvc-dispatcher'
2016-05-10 11:57:40 INFO  XmlWebApplicationContext:862 - Closing WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Tue May 10 11:57:25 IST 2016]; root of context hierarchy
2016-05-10 11:57:40.967:INFO:oejsh.ContextHandler:Scanner-0: Stopped o.e.j.m.p.JettyWebAppContext@2f7a6e0e{/,file:/D:/aa/branches/dev/saas/src/main/webapp/,UNAVAILABLE}{file:/D:/aa/branches/dev/saas/src/main/webapp/}
[INFO] Webapp source directory = D:\aa\branches\dev\saas\src\main\webapp
[INFO] Reload Mechanic: automatic
[INFO] Classes = D:\aa\branches\dev\saas\target\classes
[INFO] Context path = /
[INFO] Tmp directory = D:\aa\branches\dev\saas\target\tmp
[INFO] Web defaults = org/eclipse/jetty/webapp/webdefault.xml
[INFO] Web overrides =  none
[INFO] web.xml file = file:/D:/aa/branches/dev/saas/src/main/webapp/WEB-INF/web.xml
[INFO] Webapp directory = D:\aa\branches\dev\saas\src\main\webapp
2016-05-10 11:57:42.191:INFO:saas:Scanner-0: No Spring WebApplicationInitializer types detected on classpath
2016-05-10 11:57:42.322:INFO:saas:Scanner-0: Initializing Spring FrameworkServlet 'mvc-dispatcher'
2016-05-10 11:57:42 INFO  DispatcherServlet:484 - FrameworkServlet 'mvc-dispatcher': initialization started
2016-05-10 11:57:42 INFO  XmlWebApplicationContext:510 - Refreshing WebApplicationContext for namespace 'mvc-dispatcher-servlet': startup date [Tue May 10 11:57:42 IST 2016]; root of context hierarchy
2016-05-10 11:57:42 INFO  XmlBeanDefinitionReader:317 - Loading XML bean definitions from ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]
2016-05-10 11:57:42 INFO  PropertySourcesPlaceholderConfigurer:172 - Loading properties file from class path resource [application.properties]
2016-05-10 11:57:42 INFO  AutowiredAnnotationBeanPostProcessor:153 - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2016-05-10 11:57:42 INFO  MLog:92 - MLog clients using log4j logging.
2016-05-10 11:57:42 INFO  C3P0Registry:216 - Initializing c3p0-0.9.2.1 [built 20-March-2013 10:47:27 +0000; debug? true; trace: 10]
2016-05-10 11:57:42 INFO  Version:66 - HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2016-05-10 11:57:42 INFO  Version:54 - HHH000412: Hibernate Core {4.3.8.Final}
2016-05-10 11:57:42 INFO  Environment:239 - HHH000206: hibernate.properties not found
2016-05-10 11:57:42 INFO  Environment:346 - HHH000021: Bytecode provider name : javassist
2016-05-10 11:57:42 INFO  AbstractPoolBackedDataSource:522 - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName -> 1hge0ws9g16jrn8m15ijs29|2a8c236e, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> org.apache.derby.jdbc.EmbeddedDriver, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, identityToken -> 1hge0ws9g16jrn8m15ijs29|2a8c236e, idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl -> jdbc:derby:aaSaas;create=true, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 0, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 15, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 3, numHelperThreads -> 3, preferredTestQuery -> null, properties -> {user=******, password=******}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
2016-05-10 11:58:13 WARN  BasicResourcePool:1851 - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@53b953ec -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception: 
java.sql.SQLException: Failed to start database 'aaSaas' with class loader WebAppClassLoader=saas@5fce839, 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.AutoloadedDriver.connect(Unknown Source)
    at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
    at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)
Caused by: ERROR XJ040: Failed to start database 'aaSaas' with class loader WebAppClassLoader=saas@5fce839, 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)
    ... 18 more
Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database D:\aa\branches\dev\saas\aaSaas.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.privGetJBMSLockOnDB(Unknown Source)
    at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.getJBMSLockOnDB(Unknown Source)
    at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.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.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)
    ... 15 more
2016-05-10 11:58:13 WARN  BasicResourcePool:1851 - com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@443e7c3e -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception: 
java.sql.SQLException: Failed to create database 'aaSaas', 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.createDatabase(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.AutoloadedDriver.connect(Unknown Source)
    at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
    at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)
Caused by: ERROR XJ041: Failed to create database 'aaSaas', 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)
    ... 18 more
Caused by: ERROR XBM0J: Directory D:\aa\branches\dev\saas\aaSaas already exists.
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
    at org.apache.derby.impl.services.monitor.StorageFactoryService$10.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.derby.impl.services.monitor.StorageFactoryService.createServiceRoot(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
    at org.apache.derby.impl.services.monitor.BaseMonitor.createPersistentService(Unknown Source)
    at org.apache.derby.impl.services.monitor.FileMonitor.createPersistentService(Unknown Source)
    at org.apache.derby.iapi.services.monitor.Monitor.createPersistentService(Unknown Source)
    ... 15 more

现在我的问题是如何在重新部署时关闭连接，以便它可以创建一个新连接，或者我可以使用相同的连接吗？

mvc调度程序servlet。xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- Specifying base package of the Components like Controller, Service, 
        DAO -->
    <context:component-scan base-package="com.aa.saas" />

    <!-- Getting Database properties -->
    <context:property-placeholder location="classpath:application.properties" />

    <mvc:annotation-driven />

    <!-- Specifying the Resource location to load JS, CSS, Images etc -->
    <mvc:resources mapping="/resources/**" location="/resources/" />

    <!-- View Resolver <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
        <property name="prefix" value="/WEB-INF/pages/" /> <property name="suffix" 
        value=".jsp" /> </bean> -->

    <!-- DataSource -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass" value="${database.driverClass}" />
        <property name="jdbcUrl" value="${database.url}" />
        <property name="user" value="${database.username}" />
        <property name="password" value="${database.password}" />
        <!-- <property name="acquireIncrement" value="${connection.acquireIncrement}" 
            /> <property name="minPoolSize" value="${connection.minPoolSize}" /> <property 
            name="maxPoolSize" value="${connection.maxPoolSize}" /> <property name="maxIdleTime" 
            value="${connection.maxIdleTime}" /> -->
    </bean>

    <!-- Hibernate SessionFactory -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
                <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
            </props>
        </property>
        <property name="packagesToScan" value="com.aa.saas"></property>
    </bean>

    <!-- Transaction -->
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="aaSaasUserDAO" class="com.aa.saas.aaSaasUserDAOImpl"></bean>

</beans>

网状物xml

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    id="WebApp_ID">
    <display-name>saas</display-name>

    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>

</web-app>

应用属性

#Database related properties
database.driverClass=org.apache.derby.jdbc.EmbeddedDriver
database.url=jdbc:derby:aaSaas;create=true
database.username=aa
database.password=aa

#Hibernate related properties
hibernate.dialect=org.hibernate.dialect.DerbyDialect
hibernate.hbm2ddl.auto=update
hibernate.show_sql=true
hibernate.format_sql=true

#Connection pool related properties
#connection.acquireIncrement=2
#connection.minPoolSize=20
#connection.maxPoolSize=50
#connection.maxIdleTime=600

共有1个答案

宗政欣可
2023-03-14

哈林德，

我想你需要编辑一些代码。

读取错误消息。。

  1. 目录D:\aa\branchs\dev\saas\aaaas已经存在

derby文件夹中的delate文件夹（aaSaas）

        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.DerbyDialect</prop> 
            <prop key="hibernate.default_schema">test</prop>
            <prop key="hibernate.connection.pool_size">4</prop>
            <prop key="hibernate.connection.shutdown">true</prop>
            <prop key="hibernate.show_sql">true</prop> 
            <prop key="hibernate.hbm2ddl.auto">create</prop><!--delete all entity after create entity  -->
        </props>

嗯。。。

数据源

 <bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> 
    <property name="driverClass" value="org.apache.derby.jdbc.ClientDriver"></property> 
    <property name="username" value="user"></property> <property name="password" 
    value="1234"></property> <property name="url" value="jdbc:derby://localhost:1527/aaSaas;create=true"></property> 
    </bean>

我使用JPA和Derby。。在其他情况下。

嗯。。祝你好运

 类似资料：
  • 嵌入式derby多连接问题

    我的web应用程序（将部署在tomcat上）需要一个嵌入式数据库来存储临时用户数据，以便更快地检索。我选择Apache Embedded Derby是因为它很容易嵌入到web应用程序中，而且是一个纯Java DB。 我还实现了连接池来检索连接。我在这里面临着两个关键的问题（显示塞子）。首先，我的应用程序一次不能有两个以上的活动连接。所以，我的应用程序挂断了。 其次，我不断发现另一个应用程序已经启动

  • Spring Boot嵌入式Apache Derby

    我知道以前也有人问过类似的问题并回答过。但我试过了前面的答案的解决方案，但它们并不奏效。我已经尽我所能尝试了，希望有人能为我面临的问题提供一些启示。 在Spring Boot应用程序中配置嵌入式Derby 这是我的代码, 应用程序.属性 ApachederByExample.java 我只是试图在应用程序中使用Apache Derby嵌入式数据库，并且使用Maven中定义的依赖项，我不知道为什么仍

  • ActiveMQ和CachingConnectionFactory的自动重新连接问题

    问题内容： 我在使用ActiveMQ和Spring时遇到问题。我像这样设置它们： 正在使用故障转移传输： 我遇到的问题是，如果一个盒子掉了，我们应该开始在另一个盒子上发送消息，但是它似乎仍在使用旧的连接（每次发送都超时）。如果我重新启动该程序，它将再次连接并且一切正常。 我的理解是应该自行修复（重新连接到新盒子），并且每次都应请求新连接，因此应该可以。我想知道这是否可能做得不好（是否在缓存与旧服务

  • 嵌入式Jetty 8热部署类(使用Maven)

    我定义了一个标准的Maven webapp结构，它使用Spring MVC。 我正在使用嵌入式 Jetty 服务器（java 类）来测试开发中的应用程序。 用于创建 Jetty 服务器的代码概述如下。如果我对任何 JSP 文件进行更改，则这些更改将立即在浏览器中可见。 然而，如果我更改了任何类文件，例如控制器，这些更改不会被热部署。 我该怎么做才能让它工作？ 我已经搜索了这个，我认为我需要使用类组

  • Spring Data Elasticsearch自动重新连接

    我有一个Spring Boot应用程序，我使用ElasticsearchTemplate连接到我的ElasticSearch。然而，当它工作时，我关闭了Elasticsearch，每次我使用ElasticTemplate方法时，我都会得到一个组织。elasticsearch。客户运输NoNodeAvailableException。这很好，因为ElasticSearch不起作用。 然而，当Elas

  • 将hibernate与嵌入式derby一起使用

    问题内容： 我想在 独立应用程序* 中将 hibernate 与 嵌入式derby 一起使用，并且我有一些问题： * 我需要什么jar？ 必要的hibernate配置是什么？ 还有其他必要的配置吗？ 查询/条件是否有任何问题/限制？ 如果您还可以建议我一些适合这种方法的好教程，那将是可取的，谢谢。 问题答案： 我将Apache Derby与Hibernate一起用于测试项目的一个模型类（它们的 e

相关问答

自动连接和注入bean的外部Java库问题嵌入式Jetty 8和无XML的JNDI MySQL连接池配置Spring Boot JPA-配置自动重新连接如何在Spring中自动重新连接数据源连接？Spring Boot嵌入式Kafka无法连接

相关文章

猫鼬自动重新连接选项Web环境中的NoClassDefFoundError错误问题Spring / Wicket / Derby / JettyJava Eclipse Paho实现-自动重新连接Spring自动连接列表Wildfly并自动重新连接到数据库

相关阅读

新产业嵌入式软件 凉经兆易创新嵌入式软件一面嵌入式面经30题嵌入式每日30题Oracle自身连接

相关工具

红旗嵌入式Linuxspring-db-templateApache DerbyAndroid 自动更新DemoJetty

相关文档

嵌入式笔记部署 kubernetes 集群Hibernate 入门教程Hibernate 入门教程Laravel 开发环境部署 6.x
快捷导航： 新手教程 算法原理 架构设计 Java进阶 数据库进阶 大厂专栏 面试经验 编程笔记 编程问答 所有专题 文档资料 工具软件 电子书籍 小牛导航
在线工具： 房贷计算器 个税计算器 Linux命令查询 Json格式化 正则表达式 颜色转换 AES加解密 SHA1加密 MD5加密 毒鸡汤 字数统计 随机密码生成 进制转换 Base64编解码 励志句子
Copyright © 2019-2024 小牛知识库@xnip.cn. All Rights Reserved.