Java Spring实例化Bean时出错_Java_Spring

Java Spring实例化Bean时出错

java spring

Java Spring实例化Bean时出错,java,spring,Java,Spring,当我尝试在eclipse之外运行应用程序时，出现以下错误：创建名为“naLdap”的bean时出错：bean的实例化失败；嵌套的异常为org.springframework.beans.BeanInstantiationException:无法实例化bean类[org.springframework.ldap.core.LdapTemplate]：构造函数引发异常；嵌套异常是java.lang.NullPointerException 搜索所有帖子，我只找到使用Spring身份验证的示例。在本

当我尝试在eclipse之外运行应用程序时，出现以下错误：

创建名为“naLdap”的bean时出错：bean的实例化失败；嵌套的异常为org.springframework.beans.BeanInstantiationException:无法实例化bean类[org.springframework.ldap.core.LdapTemplate]：构造函数引发异常；嵌套异常是java.lang.NullPointerException

搜索所有帖子，我只找到使用Spring身份验证的示例。在本例中，我将根据区域搜索三个不同的Ldap实例。如有任何帮助/见解，将不胜感激

配置如下：

<?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:ldap="http://www.springframework.org/schema/ldap"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/ldap http://www.springframework.org/schema/ldap/spring-ldap.xsd">

   <ldap:context-source
          url="ldap://corporate.root.corp:389"
          base="dc=corporate, dc=root, dc=corp"
          username="xyz"
          password="xyz"
          referral="follow"
          id="na-context" />

   <ldap:context-source
          url="ldap://europe.root.corp:389"
          base="DC=europe,DC=root,DC=corp"
          username="xyz"
          password="xyz"
          referral="follow"
          id="europe-context" />

   <ldap:context-source
          url="ldap://asia-pac.root.corp:389"
          base="DC=asia-pac,DC=root,DC=corp"
          username="xyz"
          password="xyz"
          referral="follow"
          id="asia-context" />


   <ldap:ldap-template id="naLdap" context-source-ref="na-context" />
   <ldap:ldap-template id="asiaLdap" context-source-ref="asia-context" />
   <ldap:ldap-template id="europeLdap" context-source-ref="europe-context" />

   <bean id="personRepo" class="com.test.users.repo.PersonRepoImpl">
      <property name="naTemplate" ref="naLdap" />
      <property name="asiaTemplate" ref="asiaLdap" />
      <property name="europeTemplate" ref="europeLdap" />
   </bean>

</beans>

完整堆栈跟踪：

 Error creating bean with name 'naLdap': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'naLdap': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1076)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1021)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
        at com.test.users.LoadUsersFromAD.getAllUsersToExamine(LoadUsersFromAD.java:330)
        at com.test.users.LoadUsersFromAD.run(LoadUsersFromAD.java:102)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:164)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1069)
        ... 15 more
Caused by: java.lang.NullPointerException
        at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.isAtLeast30(DefaultObjectDirectoryMapper.java:80)
        at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.<init>(DefaultObjectDirectoryMapper.java:71)
        at org.springframework.ldap.core.LdapTemplate.<init>(LdapTemplate.java:93)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148)
        ... 17 more

创建名为“naLdap”的bean时出错：bean实例化失败；嵌套的异常为org.springframework.beans.BeanInstantiationException:无法实例化bean类[org.springframework.ldap.core.LdapTemplate]：构造函数引发异常；嵌套异常是java.lang.NullPointerException
org.springframework.beans.factory.BeanCreationException:创建名为“naLdap”的bean时出错：bean实例化失败；嵌套的异常为org.springframework.beans.BeanInstantiationException:无法实例化bean类[org.springframework.ldap.core.LdapTemplate]：构造函数引发异常；嵌套异常是java.lang.NullPointerException
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.InstanceBean（AbstractAutowireCapableBeanFactory.java:1076）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowireCapableBeanFactory.java:1021）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:504）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:475）
位于org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject（AbstractBeanFactory.java:304）
位于org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:228）
位于org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:300）
位于org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:195）
位于org.springframework.beans.factory.support.DefaultListableBeanFactory.PreInstanceSingleton（DefaultListableBeanFactory.java:700）
位于org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:760）
位于org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:482）
位于org.springframework.context.support.ClassPathXmlApplicationContext。（ClassPathXmlApplicationContext.java:139）
位于org.springframework.context.support.ClassPathXmlApplicationContext。（ClassPathXmlApplicationContext.java:83）
在com.test.users.LoadUsersFromAD.GetAllUsersToTest（LoadUsersFromAD.java:330）上
位于com.test.users.LoadUsersFromAD.run（LoadUsersFromAD.java:102）
位于java.lang.Thread.run（未知源）
原因：org.springframework.beans.BeanInstantiationException:无法实例化bean类[org.springframework.ldap.core.LdapTemplate]：构造函数引发异常；嵌套异常是java.lang.NullPointerException
位于org.springframework.beans.BeanUtils.InstanceClass（BeanUtils.java:164）
位于org.springframework.beans.factory.support.SimpleInstallationStrategy.instantiate（SimpleInstallationStrategy.java:89）
位于org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.InstanceBean（AbstractAutowireCapableBeanFactory.java:1069）
... 还有15个
原因：java.lang.NullPointerException
位于org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.isAtLeast30（DefaultObjectDirectoryMapper.java:80）
位于org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper。（DefaultObjectDirectoryMapper.java:71）
位于org.springframework.ldap.core.LdapTemplate（LdapTemplate.java:93）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（未知源）
位于sun.reflect.delegatingConstructor或AccessorImpl.newInstance（未知源）
位于java.lang.reflect.Constructor.newInstance（未知源）
位于org.springframework.beans.BeanUtils.InstanceClass（BeanUtils.java:148）
... 还有17个

编辑：这是SpringLDAP 2.0.0中的一个错误。确保至少使用2.0.1或2.0.2（最新版本）

以下是我的第一个解释：

显然，根据stacktrace，Spring在确定Spring版本时存在问题。让我解释一下发生了什么：

SpringLDAP正在尝试确定使用的Spring版本是否大于3.0（发生在方法isAtLeast30中）。这是通过使用SpringJAR（特别是密钥实现版本）中MANIFEST.MF的信息来完成的。如果缺少此信息（例如，因为您有一个重新打包的Spring版本），则实现版本将返回null，这将导致此NullPointerException

因此，您应该检查SpringCoreJAR是否有正确的MANIFEST.MF（在META-INF文件夹中）。也可能是这样，您拥有正确的MANIFEST.MF，但类加载器无法检索元数据。在这种情况下，除了在Spring LDAP项目中提交错误之外，您无法做任何事情，因为他们在方法中不处理这种情况。

请发布NullPointerException的完整stacktrace。很抱歉，我已将完整跟踪添加到原始帖子中。感谢您的帮助。你的解决方案解决了这个问题。在我的情况下，我在做一个老项目，这个NPE ex

ApplicationContext context = new ClassPathXmlApplicationContext(
        "ldap-config.xml");

PersonRepo simpleSearch = context.getBean("personRepo",
        PersonRepo.class);

 Error creating bean with name 'naLdap': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'naLdap': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1076)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1021)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
        at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
        at com.test.users.LoadUsersFromAD.getAllUsersToExamine(LoadUsersFromAD.java:330)
        at com.test.users.LoadUsersFromAD.run(LoadUsersFromAD.java:102)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.ldap.core.LdapTemplate]: Constructor threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:164)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1069)
        ... 15 more
Caused by: java.lang.NullPointerException
        at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.isAtLeast30(DefaultObjectDirectoryMapper.java:80)
        at org.springframework.ldap.odm.core.impl.DefaultObjectDirectoryMapper.<init>(DefaultObjectDirectoryMapper.java:71)
        at org.springframework.ldap.core.LdapTemplate.<init>(LdapTemplate.java:93)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148)
        ... 17 more