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For input string: "20 " 求解

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 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NumberFormatException: For input string: "20 "
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1512)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
   at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)
   at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
   at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)
   at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:610)
   at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
   at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
   at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
   at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
   at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5118)
   at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5634)
   at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
   at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
   at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
   at java.util.concurrent.FutureTask.run(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NumberFormatException: For input string: "20 "
   at java.lang.NumberFormatException.forInputString(Unknown Source)
   at java.lang.Integer.parseInt(Unknown Source)
   at java.lang.Integer.parseInt(Unknown Source)
   at org.hibernate.cfg.HbmBinder.bindColumn(HbmBinder.java:1676)
   at org.hibernate.cfg.HbmBinder.bindColumns(HbmBinder.java:1085)
   at org.hibernate.cfg.HbmBinder.bindColumnsOrFormula(HbmBinder.java:1547)
   at org.hibernate.cfg.HbmBinder.bindSimpleValue(HbmBinder.java:1143)
   at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2102)
   at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2060)
   at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:381)
   at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:295)
   at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:166)
   at org.hibernate.cfg.Configuration.add(Configuration.java:716)
   at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:551)
   at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:680)
   at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:188)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1571)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509)
   ... 21 more