无法在 JUnit 中获得 JDBC 连接

Question

我看过与此问题相关的其他帖子，但似乎无法理解 and/or 应用我的代码来解决此问题。因此，您的帮助将非常有帮助。

这是错误堆栈跟踪：

org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot load JDBC driver class 'com.ibm.db2.jcc.DB2Driver'
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:627)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:692)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:724)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:734)
at org.springframework.jdbc.core.JdbcTemplate.queryForRowSet(JdbcTemplate.java:899)
at com.cinfin.edocs.services.dao.FormMatrixDaoImpl.validateNonProductionStatusInMatrix(FormMatrixDaoImpl.java:857)
at com.cinfin.edocs.services.dao.FormMatrixDaoImplTest.testValidateNonProductionStatusInMatrix(FormMatrixDaoImplTest.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:72)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:81)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:216)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:82)
at org.junit.runners.ParentRunner.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access[=11=]0(ParentRunner.java:53)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:229)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:60)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:67)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:162)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.sql.SQLException: Cannot load JDBC driver class 'com.ibm.db2.jcc.DB2Driver'
at org.apache.commons.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2001)
at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:1897)
at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1413)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 36 more
Caused by: java.lang.ClassNotFoundException: com.ibm.db2.jcc.DB2Driver
at java.net.URLClassLoader.run(URLClassLoader.java:366)
at java.net.URLClassLoader.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.apache.commons.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:1992)
... 40 more

我的 FormMatrixDaoImpl class:

import javax.sql.DataSource;

@Repository
public class FormMatrixDaoImpl extends NamedParameterJdbcDaoSupport implements FormMatrixDao {

@Autowired  
public FormMatrixDaoImpl(@Qualifier("vitDataSource") DataSource dataSource, @Value("#{edocsQueryMap}") HashMap<String, String> edocsQueryMap) {
    super();

        @Override
    public SqlRowSet validateNonProductionStatusInMatrix(String projectId) throws SQLException {
        logger.info("validateNonProductionStatusInMatrix. projectId: "+projectId);

        SqlRowSet ret = getJdbcTemplate().queryForRowSet(qValidateNonProductionStatusInMatrix, new Object[] {projectId});

        return ret;
    }
}

我的 FormMatrixDaoImplTest class:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:datasources.xml","classpath:edocservices.xml","classpath:edocservicesclients.xml", "/WEB-INF/edocservices-servlet.xml"})
@ActiveProfiles("local")

public class FormMatrixDaoImplTest {

@Autowired
private FormMatrixDaoImpl formMatrixDaoImpl;
public FormMatrixDaoImpl getFormMatrixDaoImpl() {
    return formMatrixDaoImpl;
}
public void setFormMatrixDaoImpl(FormMatrixDaoImpl formMatrixDaoImpl) {
    this.formMatrixDaoImpl = formMatrixDaoImpl;
}

@Test
public final void testValidateNonProductionStatusInMatrix() throws SQLException {
    SqlRowSet test = formMatrixDaoImpl.validateNonProductionStatusInMatrix("0b003e8880072976");
    assertEquals(test,null);
    }

我的 datasources.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:util="http://www.springframework.org/schema/util" 
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd"> 

<beans profile="production,user,quality,development">         
    <bean id="vitDataSource" class="org.springframework.jndi.JndiObjectFactoryBean" lazy-init="true">
        <description>JNDI VITEDOC DB2 datasource</description>
        <property name="jndiName" value="${database.vitedoc.jndi}"/>        
    </bean>
    <bean id="docDataSource" class="org.springframework.jndi.JndiObjectFactoryBean" lazy-init="true">
        <description>JNDI DOCEDOC DB2 datasource</description>
        <property name="jndiName" value="${database.docedoc.jndi}"/>        
    </bean>

    <beans profile="local">     
    <bean id="vitDataSource" class="org.apache.commons.dbcp2.BasicDataSource" lazy-init="true" destroy-method="close">
        <description>Standalone VITEDOC datasource</description>
        <property name="driverClassName" value="${database.vitedoc.driver.classname}"/>
        <property name="url" value="${database.vitedoc.url}" />
        <property name="username" value="${database.vitedoc.username}"/>
        <property name="password" value="${database.vitedoc.password}"/>
    </bean>
    <bean id="docDataSource" class="org.apache.commons.dbcp2.BasicDataSource" lazy-init="true" destroy-method="close">
        <description>Standalone DOCEDOC datasource</description>
        <property name="driverClassName" value="${database.docedoc.driver.classname}"/>
        <property name="url" value="${database.docedoc.url}" />
        <property name="username" value="${database.docedoc.username}"/>
        <property name="password" value="${database.docedoc.password}"/>
    </bean>
</beans>

我的 edocservices.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:ws="http://www.springframework.org/schema/web-services"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:c="http://www.springframework.org/schema/c"    
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util" 
xmlns:jms="http://www.springframework.org/schema/jms"   
xsi:schemaLocation="http://www.springframework.org/schema/web-services http://www.springframework.org/schema/web-services/web-services.xsd
                    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
                    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd                       
                    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd                      
                    http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-4.1.xsd">

上面的 xml 有编组器、解组器、端点和 wsdls。

这是我的 edocservicesclient.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
xmlns:util="http://www.springframework.org/schema/util"     
xmlns:context="http://www.springframework.org/schema/context"   
xmlns:oxm="http://www.springframework.org/schema/oxm"       
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd       
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
    http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.1.xsd">

<context:property-placeholder location="classpath:edocservices.properties"/>
<context:component-scan base-package="com.cinfin.edocs.services"/>

上面的xml还有一些其他的编组器、解组器和saajmessagefactory。

这是我的 edocservices-servlet.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:oxm="http://www.springframework.org/schema/oxm"
xmlns:mvc="http://www.springframework.org/schema/mvc"  xmlns:util="http://www.springframework.org/schema/util"
xmlns:p="http://www.springframework.org/schema/p" xmlns:c="http://www.springframework.org/schema/c"
xmlns:cache="http://www.springframework.org/schema/cache" xmlns:task="http://www.springframework.org/schema/task"               
xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd  
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.1.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd      
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
    http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.1.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd">

<context:property-placeholder location="classpath:edocservices.properties"/>
<context:component-scan base-package="com.cinfin.edocs.services"/>  
<context:annotation-config/>

当我运行我的 FormMatrixDaoImplTest class 作为 JUnit 测试时，我得到无法获得 jdbc 连接错误。此错误仅与 JUnit 测试相关，并且在本地程序运行s 时不会出现。所以我觉得我可能会遗漏一些 JUnit 设置或类似的东西。

任何在代码 and/or 中指出 errors/mistakes 指向其他方法来测试运行 'select' 命令以从数据库检索数据的帮助将不胜感激。

提前致谢。

Answer 1

错误无法加载 JDBC 驱动程序 class 'com.ibm.db2.jcc.DB2Driver' 指出包含 class 的 jar 在运行时 classpath 中不可用。确保包含 class 的罐子可用。

参考：How to Set Runtime classpath with eclipse

Answer 2

1) 从我上面的笔记中：

It sounds like you're probably using Spring on WebSphere. The core error in your log is Cannot load JDBC driver class com.ibm.db2.jcc.DB2Driver.

SUGGESTIONS:

trace where your JNDI definitions (for example, vitDataSource) are defining their driver classnames (like database.vitedoc.driver.classname)

2) Make sure this DB2Driver available as a JDBC resource in your WebSphere Admin console ... and/or ...

3) Make sure the DB2 driver .jar is configured in your pom.xml (if you're using Maven).

2) 您已确认：

"...the classname is defined as: database.vitedoc.driver.classname=com.ibm.db2.jcc.DB2Driver"

<= Good!

3) 所以现在你需要做的就是：

a) 确保你有一个有效的 db2jcc.jar:

http://www-01.ibm.com/support/docview.wss?uid=swg21363866

b) 确保 .jar 在类路径中

如果您是运行 WebSphere，我更喜欢在 WebSphere 管理控制台中执行此操作：

http://www-01.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/tdat_ccrtpds.html?cp=SSAW57_8.5.5%2F1-3-0-23-3-0-7-2

如果这是一个简单的 Web 应用程序，您可以将它添加到 Eclipse 项目的 \lib 文件夹中：

http://help.eclipse.org/indigo/index.jsp?topic=%2Forg.eclipse.wst.webtools.doc.user%2Ftopics%2Fccwebprj.html

Answer 3

以下是将第三方库添加到 eclipse 的方法。

打开 eclipse 转到包资源管理器。
右键单击您的项目和 select 项目属性。
单击 java 左侧栏中的构建路径弹出。
Select 库选项卡。
Select "Add External Jar File" 并使用浏览器导航到您的 JAR 文件和 select 它们 "Open" 然后 "OK".

无法在 JUnit 中获得 JDBC 连接

Could not get JDBC connection in JUnit

java

xml

junit

spring

jdbc