新项目的辅助系统，需要用到mongo系统，今天再次将其使用环境进行了操作搭建。还是遇到一些问题，毕竟之前使用的场景和现在的不同。版本也不一样了。
本次使用的环境：
mongo：3.4.4版本
OS： redhat7
java操作mongo库
1. 首先，mongo数据库的安装
直接到mongodb官网下载mongodb-linux-x86_64-rhel70-3.4.4.tgz。解压之后，运行mongod即可启动服务。当然，我这里是为了项目开发用，第一步就启用单实例。
看看我们的mongodb的配置：
#数据库数据存放路径
dbpath = /home/tkrobot/mongodb/data
#日志存放路径 logpath = /home/tkrobot/mongodb/logs/mongodb.log logappend = true port = 27017 fork = true
#启动认证功能，要想连接到数据库，必须经过用户名密码认证才可以 auth = true
#禁止http访问数据库 nohttpinterface = true
#连接数据库时必须是这个ip bind_ip = 10.90.7.10 journal = true
#最大连接数 maxConns = 100
这里，需要在mongod启动前，创建好/home/tkrobot/mongodb/data以及/home/tkrobot/mongodb/logs两个目录。
启动mongod的脚本：
./mongod --config /etc/mongodb.conf
这样，mongod就算启动好了。下面有其启动日志：
2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] MongoDB starting : pid=98891 port=27017 dbpath=/home/tkrobot/mongodb/data 64-bit host=localhost.localdomain 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] db version v3.4.4 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] git version: 888390515874a9debd1b6c5d36559ca86b44babd 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] allocator: tcmalloc 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] modules: none 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] build environment: 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] distmod: rhel70 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] distarch: x86_64 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] target_arch: x86_64 2017-05-02T11:20:03.553+0800 I CONTROL [initandlisten] options: { config: "/etc/mongodb.conf", net: { bindIp: "10.90.7.10", http: { enabled: false }, maxIncomingConnections: 100, port: 27017 }, security: { authorization: "enabled" }, st orage: { dbPath: "/home/tkrobot/mongodb/data", journal: { enabled: true } }, systemLog: { destination: "file", logAppend: true, path: "/home/tkrobot/mongodb/logs/mongodb.log" } } 2017-05-02T11:20:03.553+0800 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=15438M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=jo urnal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0), 2017-05-02T11:20:03.567+0800 I CONTROL [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended. 2017-05-02T11:20:03.567+0800 I CONTROL [initandlisten] 2017-05-02T11:20:03.567+0800 I CONTROL [initandlisten] 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** WARNING: You are running on a NUMA machine. 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** We suggest launching mongod like this to avoid performance problems: 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** numactl --interleave=all mongod [other options] 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'. 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2017-05-02T11:20:03.568+0800 I CONTROL [initandlisten] 2017-05-02T11:20:03.571+0800 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/home/tkrobot/mongodb/data/diagnostic.data' 2017-05-02T11:20:03.575+0800 I INDEX [initandlisten] build index on: admin.system.version properties: { v: 2, key: { version: 1 }, name: "incompatible_with_version_32", ns: "admin.system.version" } 2017-05-02T11:20:03.575+0800 I INDEX [initandlisten] building index using bulk method; build may temporarily use up to 500 megabytes of RAM 2017-05-02T11:20:03.576+0800 I INDEX [initandlisten] build index done. scanned 0 total records. 0 secs 2017-05-02T11:20:03.576+0800 I COMMAND [initandlisten] setting featureCompatibilityVersion to 3.4 2017-05-02T11:20:03.576+0800 I NETWORK [thread1] waiting for connections on port 27017
2. 接下来，我们操作一下，验证数据库部署的情况是否ok。
为了方便使用mongo客户端指令，将解压后的mongo配置到环境变量里面，方便操作。
export MONGODB_PATH=/home/tkrobot/mongodb-linux-x86_64-rhel70-3.4.4
export PATH=$JAVA_HOME/bin:$MONGODB_PATH/bin:$PATH
用mongo登录操作数据库：
[root@localhost bin]# mongo MongoDB shell version v3.4.4 connecting to: mongodb://10.90.7.10:27017 MongoDB server version: 3.4.4 Welcome to the MongoDB shell. For interactive help, type "help". For more comprehensive documentation, see http://docs.mongodb.org/ Questions? Try the support group http://groups.google.com/group/mongodb-user > show dbs; 2017-05-02T11:21:08.878+0800 E QUERY [thread1] Error: listDatabases failed:{ "ok" : 0, "errmsg" : "not authorized on admin to execute command { listDatabases: 1.0 }", "code" : 13, "codeName" : "Unauthorized" } : _getErrorWithCode@src/mongo/shell/utils.js:25:13 Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1 shellHelper.show@src/mongo/shell/utils.js:769:19 shellHelper@src/mongo/shell/utils.js:659:15 @(shellhelp2):1:1
没有权限，因为我们在mongod.conf里面指定要auth了。最简单的办法，就是将mongod.conf里面的auth注释掉，重新启动mongod，进行权限配置。
在没有auth属性的情况下，启动mongod，然后再次mongo连接上数据库，use指定的数据库，创建一个专属的用户。
use robotkdb
指定数据库robotkdb后，创建一个用户robotassister。
db.createUser({ ... user:"robotassister", ... pwd:"xxyyyxxxxx", ... roles:[{role:"dbOwner",db:"robotkdb“}]})
这样，就相当于给指定的数据库robotkdb创建了一个角色为dbOwener的用户robotassister。
最后，将mongodb.conf中的auth重新放开，启用auth，再启动mongod，并进行指定数据库和用户名的方式连接到mongodb：
mongo --host 10.90.7.10 --port 27017 -u robotassister -p xxyyyxxxx robotdb
如此，一切都ok，单实例的mongod配置带auth的启动，客户端通过credentials的方式连接到指定的库，准备工作就绪。
3. spring集成mongodb。
安装spring官方的文档介绍，这个过程是比较简单的。集成过程中需要用到的支持mongodb的jar包也不多。主要有：
mongo-java-driver-3.4.1.jar spring-data-commons-1.10.0.RELEASE.jar spring-data-commons-core-1.4.1.RELEASE.jar spring-data-mongodb-1.7.0.RELEASE.jar
上述的jar是我的集成过程中用到的。
我在自己既有的spring mvc的web项目里面，添加了mongodb的支持。
首先看看mongodb的xml配置文件spring-mongo.xml：
<?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:mongo="http://www.springframework.org/schema/data/mongo" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd" default-lazy-init="default"> <!--credentials的配置形式是：用户名:密码@默认数据库--> <mongo:mongo-client id="mongoClient" host="${mongo.host}" port="${mongo.port}" credentials="${mongo.username}:${mongo.password}@${mongo.dbname}"> <mongo:client-options write-concern="SAFE" connections-per-host="${mongo.connectionsPerHost}" threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}" connect-timeout="${mongo.connectTimeout}" max-wait-time="${mongo.maxWaitTime}" socket-timeout="${mongo.socketTimeout}"/> </mongo:mongo-client> <mongo:db-factory id="mongoDbFactory" dbname="${mongo.dbname}" mongo-ref="mongoClient" /> <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" /> </bean> </beans>
其中的参数配置文件mongo.properties:
mongo.dbname=robotkdb mongo.host=10.90.7.10 mongo.port=27017 mongo.username=robotassister mongo.password=xxyyyxxxxx #一个线程变为可用的最大阻塞数 mongo.connectionsPerHost=8 #线程队列数,它以上面connectionsPerHost值相乘的结果就是线程队列最大值 mongo.threadsAllowedToBlockForConnectionMultiplier=4 #连接超时时间（毫秒） mongo.connectTimeout=1500 #最大等待时间 mongo.maxWaitTime=1500 #自动重连 mongo.autoConnectRetry=true #scoket保持活动 mongo.socketKeepAlive= true #scoket超时时间 mongo.socketTimeout=1500 #读写分离 mongo.slaveOk=true
接下来，看看spring的配置文件applicationContext.xml:
<?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:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="configRealm" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="locations"> <list> <value>classpath:conf/internal.properties</value> <value>classpath:conf/jdbc.properties</value> <value>classpath:conf/redis.properties</value> <value>classpath:conf/session.properties</value> <value>classpath:conf/mongo.properties</value> </list> </property> </bean> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer"> <property name="properties" ref="configRealm"/> </bean> <bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"> <property name="cacheManager" ref="ehcacheManager"/> </bean> <bean id="ehcacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:conf/ehcache.xml"/> </bean> <cache:annotation-driven cache-manager="springCacheManager"/> <import resource="spring-servlet.xml"/> <import resource="spring-cache.xml"/> <import resource="spring-dao.xml"/> <import resource="spring-redis.xml"/> <import resource="spring-mongo.xml"/> </beans>
ok,到此，所有的配置工作都完毕了，我们就启动web项目，看看是否能正常启动吧！遗憾，出了下面的错误！！！！！
五月 02, 2017 4:49:49 下午 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Failed to import bean definitions from relative location [spring-mongo.xml] Offending resource: class path resource [conf/applicationContext.xml]; nested exception is org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 275 in XML document from class path resource [conf/spring-mongo.xml] is invalid; nested exception is org.xml.sax.SAXParseException; systemId: http://www.springframework.org/schema/data/mongo/spring-mongo-1.7.xsd; lineNumber: 275; columnNumber: 63; src-resolve: 无法将名称 'repository:auditing-attributes' 解析为 'attribute group' 组件。 at org.springframework.beans.factory.parsing.FailFastProblemReporter.error(FailFastProblemReporter.java:68) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:85) at org.springframework.beans.factory.parsing.ReaderContext.error(ReaderContext.java:76) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.importBeanDefinitionResource(DefaultBeanDefinitionDocumentReader.java:274) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseDefaultElement(DefaultBeanDefinitionDocumentReader.java:199) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:147) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:101) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:495) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:542) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4811) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5251) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 275 in XML document from class path resource [conf/spring-mongo.xml] is invalid; nested exception is org.xml.sax.SAXParseException; systemId: http://www.springframework.org/schema/data/mongo/spring-mongo-1.7.xsd; lineNumber: 275; columnNumber: 63; src-resolve: 无法将名称 'repository:auditing-attributes' 解析为 'attribute group' 组件。 at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:397) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303) at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.importBeanDefinitionResource(DefaultBeanDefinitionDocumentReader.java:258) ... 28 more Caused by: org.xml.sax.SAXParseException; systemId: http://www.springframework.org/schema/data/mongo/spring-mongo-1.7.xsd; lineNumber: 275; columnNumber: 63; src-resolve: 无法将名称 'repository:auditing-attributes' 解析为 'attribute group' 组件。 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaErr(XSDHandler.java:4162) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaError(XSDHandler.java:4145) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getGlobalDecl(XSDHandler.java:1741) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDAttributeGroupTraverser.traverseLocal(XSDAttributeGroupTraverser.java:80) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDAbstractTraverser.traverseAttrsAndAttrGrps(XSDAbstractTraverser.java:643) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDComplexTypeTraverser.processComplexContent(XSDComplexTypeTraverser.java:1122) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDComplexTypeTraverser.traverseComplexTypeDecl(XSDComplexTypeTraverser.java:335) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDComplexTypeTraverser.traverseLocal(XSDComplexTypeTraverser.java:164) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:392) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDElementTraverser.traverseGlobal(XSDElementTraverser.java:242) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.traverseSchemas(XSDHandler.java:1433) at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:630) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:616) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(XMLSchemaValidator.java:2453) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1772) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:746) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:378) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2778) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347) at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:75) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:389) ... 31 more
这个，还真是折腾了我一段时间，最终找到原因：
上述这个错误，需要在spring-mongo.xml文件中添加下面的两行内容
http://www.springframework.org/schema/data/repository
http://www.springframework.org/schema/data/repository/spring-repository-1.7.xsd
采用基于mongo:mongo-client标签进行安全配置，mongo要求spring-mongo.xsd必须是1.6及以上的版本。我们这里选用的是1.7.
ok，再次运行看看吧。。。。。。结果如何呢。。。。。。。。。
五月 02, 2017 6:03:55 下午 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mongoTemplate' defined in class path resource [conf/spring-mongo.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.data.mongodb.core.MongoTemplate]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/objenesis/ObjenesisStd at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:285) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1077) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:981) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:487) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:636) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:938) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4811) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5251) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.data.mongodb.core.MongoTemplate]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/objenesis/ObjenesisStd at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:121) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:277) ... 23 more Caused by: java.lang.NoClassDefFoundError: org/springframework/objenesis/ObjenesisStd at org.springframework.data.mongodb.core.convert.DefaultDbRefResolver.<init>(DefaultDbRefResolver.java:72) at org.springframework.data.mongodb.core.MongoTemplate.getDefaultMongoConverter(MongoTemplate.java:2029) at org.springframework.data.mongodb.core.MongoTemplate.<init>(MongoTemplate.java:216) at org.springframework.data.mongodb.core.MongoTemplate.<init>(MongoTemplate.java:201) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148) ... 25 more Caused by: java.lang.ClassNotFoundException: org.springframework.objenesis.ObjenesisStd at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139) ... 34 more
又出现了错误。。。看来不是很顺利啊，再研究看root cause是什么呢？？？依据
爆出上述错误，经过查找原因，得知，sping-data-mongo要求spring-core必须是4.x的版本，也就是说spring4才行。
源头是通过查找日志中红色部分的错误信息，得知相关的jar依赖文件，在spring-core 4.x的版本中默认含有，于是，将项目中原来3.2的配置信息，全部更新为4.2的，并相应的将工程的lib中spring的版本更新到4.2.再次启动应用。这次，一切都ok了。
最终能正常运行的applicationContext.xml的内容如下：
<?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:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="configRealm" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="locations"> <list> <value>classpath:conf/internal.properties</value> <value>classpath:conf/jdbc.properties</value> <value>classpath:conf/redis.properties</value> <value>classpath:conf/session.properties</value> <value>classpath:conf/mongo.properties</value> </list> </property> </bean> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer"> <property name="properties" ref="configRealm"/> </bean> <bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager"> <property name="cacheManager" ref="ehcacheManager"/> </bean> <bean id="ehcacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:conf/ehcache.xml"/> </bean> <cache:annotation-driven cache-manager="springCacheManager"/> <import resource="spring-servlet.xml"/> <import resource="spring-cache.xml"/> <import resource="spring-dao.xml"/> <import resource="spring-redis.xml"/> <import resource="spring-mongo.xml"/> </beans>