Junit測試時，test類調用manage類，manage類調用dao類

dao類的代碼中有如下語句:ContextLoader.getCurrentWebApplicationContext()

執行這條語句時返回空值,程序代碼如下:

下面給出junit測試時的錯誤語句

下面給出Junit運行時控制臺輸出的語句:

九月?26,?2014?9:31:33?上午?org.springframework.context.support.ClassPathXmlApplicationContext?prepareRefresh

INFO:?Refreshing?org.springframework.context.support.ClassPathXmlApplicationContext@5cba16:?startup?date?[Fri?Sep?26?09:31:33?CST?2014];?root?of?context?hierarchy

九月?26,?2014?9:31:33?上午?org.springframework.beans.factory.xml.XmlBeanDefinitionReader?loadBeanDefinitions

INFO:?Loading?XML?bean?definitions?from?class?path?resource?[applicationContext.xml]

九月?26,?2014?9:31:34?上午?org.springframework.context.support.PropertySourcesPlaceholderConfigurer?loadProperties

INFO:?Loading?properties?file?from?class?path?resource?[jdbc.properties]

九月?26,?2014?9:31:34?上午?org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor?

INFO:?JSR-330?""javax.inject.Inject""?annotation?found?and?supported?for?autowiring

九月?26,?2014?9:31:34?上午?com.mchange.v2.log.slf4j.Slf4jMLog$Slf4jMLogger$InfoLogger?log

INFO:?MLog?clients?using?slf4j?logging.

九月?26,?2014?9:31:34?上午?com.mchange.v2.log.slf4j.Slf4jMLog$Slf4jMLogger$InfoLogger?log

INFO:?Initializing?c3p0-0.9.5-pre8?[built?04-April-2014?04:20:15?-0700;?debug??true;?trace:?10]

九月?26,?2014?9:31:34?上午?org.hibernate.annotations.common.reflection.java.JavaReflectionManager?

INFO:?HCANN000001:?Hibernate?Commons?Annotations?{4.0.4.Final}

九月?26,?2014?9:31:34?上午?org.hibernate.Version?logVersion

INFO:?HHH000412:?Hibernate?Core?{4.3.5.Final}

九月?26,?2014?9:31:34?上午?org.hibernate.cfg.Environment?

INFO:?HHH000206:?hibernate.properties?not?found

九月?26,?2014?9:31:34?上午?org.hibernate.cfg.Environment?buildBytecodeProvider

INFO:?HHH000021:?Bytecode?provider?name?:?javassist

九月?26,?2014?9:31:34?上午?com.mchange.v2.log.slf4j.Slf4jMLog$Slf4jMLogger$InfoLogger?log

INFO:?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,?contextClassLoaderSource?->?caller,?dataSourceName?->?1hge137941cpv65mc0oevj|15fcabc,?debugUnreturnedConnectionStackTraces?->?false,?description?->?null,?driverClass?->?com.microsoft.sqlserver.jdbc.SQLServerDriver,?extensions?->?{},?factoryClassLocation?->?null,?forceIgnoreUnresolvedTransactions?->?false,?forceUseNamedDriverClass?->?false,?identityToken?->?1hge137941cpv65mc0oevj|15fcabc,?idleConnectionTestPeriod?->?60,?initialPoolSize?->?10,?jdbcUrl?->?jdbc:sqlserver://localhost:1433;DatabaseName=zl,?maxAdministrativeTaskTime?->?0,?maxConnectionAge?->?0,?maxIdleTime?->?60,?maxIdleTimeExcessConnections?->?0,?maxPoolSize?->?30,?maxStatements?->?200,?maxStatementsPerConnection?->?30,?minPoolSize?->?5,?numHelperThreads?->?3,?preferredTestQuery?->?null,?privilegeSpawnedThreads?->?false,?properties?->?{user=******,?password=******},?propertyCycle?->?0,?statementCacheNumDeferredCloseThreads?->?0,?testConnectionOnCheckin?->?false,?testConnectionOnCheckout?->?false,?unreturnedConnectionTimeout?->?0,?userOverrides?->?{},?usesTraditionalReflectiveProxies?->?false?]

九月?26,?2014?9:31:35?上午?org.hibernate.dialect.Dialect?

INFO:?HHH000400:?Using?dialect:?org.hibernate.dialect.SQLServer2008Dialect

九月?26,?2014?9:31:35?上午?org.hibernate.engine.transaction.internal.TransactionFactoryInitiator?initiateService

INFO:?HHH000399:?Using?default?transaction?strategy?(direct?JDBC?transactions)

九月?26,?2014?9:31:35?上午?org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory?

INFO:?HHH000397:?Using?ASTQueryTranslatorFactory

九月?26,?2014?9:31:35?上午?org.hibernate.validator.util.Version?

INFO:?Hibernate?Validator?bean-validator-3.0-JBoss-4.0.2

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.SchemaUpdate?execute

INFO:?HHH000228:?Running?hbm2ddl?schema?update

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.SchemaUpdate?execute

INFO:?HHH000102:?Fetching?database?metadata

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.SchemaUpdate?execute

INFO:?HHH000396:?Updating?schema

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.TableMetadata?

INFO:?HHH000261:?Table?found:?zl.dbo.t_user

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.TableMetadata?

INFO:?HHH000037:?Columns:?[id,?username,?allowance,?name,?basepay,?salary,?realname,?duties,?branchname,?password,?indexs]

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.TableMetadata?

INFO:?HHH000108:?Foreign?keys:?[]

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.TableMetadata?

INFO:?HHH000126:?Indexes:?[pk__t_user__3213e83f060deae8,?uk_g8gqk4e142wekcb1t6d3v2mwx]

九月?26,?2014?9:31:35?上午?org.hibernate.tool.hbm2ddl.SchemaUpdate?execute

INFO:?HHH000232:?Schema?update?complete

九月?26,?2014?9:31:36?上午?org.springframework.orm.hibernate4.HibernateTransactionManager?afterPropertiesSet

INFO:?Using?DataSource?[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,?contextClassLoaderSource?->?caller,?dataSourceName?->?1hge137941cpv65mc0oevj|15fcabc,?debugUnreturnedConnectionStackTraces?->?false,?description?->?null,?driverClass?->?com.microsoft.sqlserver.jdbc.SQLServerDriver,?extensions?->?{},?factoryClassLocation?->?null,?forceIgnoreUnresolvedTransactions?->?false,?forceUseNamedDriverClass?->?false,?identityToken?->?1hge137941cpv65mc0oevj|15fcabc,?idleConnectionTestPeriod?->?60,?initialPoolSize?->?10,?jdbcUrl?->?jdbc:sqlserver://localhost:1433;DatabaseName=zl,?maxAdministrativeTaskTime?->?0,?maxConnectionAge?->?0,?maxIdleTime?->?60,?maxIdleTimeExcessConnections?->?0,?maxPoolSize?->?30,?maxStatements?->?200,?maxStatementsPerConnection?->?30,?minPoolSize?->?5,?numHelperThreads?->?3,?preferredTestQuery?->?null,?privilegeSpawnedThreads?->?false,?properties?->?{user=******,?password=******},?propertyCycle?->?0,?statementCacheNumDeferredCloseThreads?->?0,?testConnectionOnCheckin?->?false,?testConnectionOnCheckout?->?false,?unreturnedConnectionTimeout?->?0,?userOverrides?->?{},?usesTraditionalReflectiveProxies?->?false?]]?of?Hibernate?SessionFactory?for?HibernateTransactionManager

但是，按照下面的邏輯順序來執行時卻沒有發生錯誤:

action類調用manage類，manage類調用dao類，manage類和dao類的代碼不變。

下面給出action類的代碼:

我想請問一下，這是為什么?如何解決?請給出具體的代碼，先謝了！

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