我已经在Alfresco中以名称CreateUserHandler创建了一个类，以便为电子邮件地址生成用户名和随机密码。我对此感到异常。请有人帮助我...
public class CreateUserHandler {
private static Logger logger = LoggerFactory.getLogger(CreateUserHandler.class);
private NodeService nodeService = getServiceRegistry().getNodeService();
private PersonService personService = getServiceRegistry()
.getPersonService();
private ActionService actionService = getServiceRegistry()
.getActionService();
private SearchService searchService = getServiceRegistry()
.getSearchService();
private PolicyComponent eventManager;
private ServiceRegistry serviceRegistry;
//private String userName;
public void setServiceRegistry(ServiceRegistry serviceRegistry) {
this.serviceRegistry = serviceRegistry;
}
private ServiceRegistry getServiceRegistry() {
// TODO Auto-generated method stub
return null;
}
public void setPolicyComponent(PolicyComponent policyComponent) {
this.eventManager = policyComponent;
}
public void registerEventHandlers() {
eventManager.bindClassBehaviour(
NodeServicePolicies.OnCreateNodePolicy.QNAME,
ContentModel.TYPE_USER,
new JavaBehaviour(this, "onaddUser",
Behaviour.NotificationFrequency.EVERY_EVENT));
}
protected String userName = null;
protected String password = null;
/**
* Get user password
* @return user password
*/
public String getPassword() {
return password;
}
/**
* Set user password
* @param password user password
*/
public void setPassword(String password) {
this.password = password;
}
public void onaddUser(ChildAssociationRef parentChildAssocRef) {
//new PersonService().setPersonProperties(userName, properties);
System.out.println("Creation of user successfully completed");
//NodeRef userNodeRef;
// String sTempUserName = this.userName;
NodeRef person = null;
String username = (String) serviceRegistry.getNodeService().getProperty(person,ContentModel.PROP_USERNAME);
System.out.println("Username got :" + username);
if (personService.personExists(username)) {
//NodeRef person = personService.getPerson(sTempUserName);
person = personService.getPerson(username);
String address = (String) nodeService.getProperty(person,
ContentModel.PROP_EMAIL);
if (address != null && address.length() != 0) {
// recipients.add(address);
System.out.println("Email Address is :" + address);
String newPassword = Password.generatePassword();
char[] cadChars = new char[newPassword.length()];
for (int i=0; i<newPassword.length(); i++)
{
cadChars[i] = newPassword.charAt(i);
}
// Save new password
serviceRegistry.getAuthenticationService().setAuthentication(username, newPassword.toCharArray());
// Save new password
setPassword(newPassword);
System.out.println("Password is :" + newPassword);
}
}
}
}
我还附加了空指针异常的日志堆栈跟踪：
Nov 10, 2016 4:46:33 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.alfresco.repo.webdav.WebDAVSessionListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.eisenvault.autoMailgenerate.createUserHandler' defined in class path resource [alfresco/module/demoact1-repo/context/service-context.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.eisenvault.autoMailgenerate.CreateUserHandler]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1038)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:984)
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$1.getObject(AbstractBeanFactory.java:293)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:191)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:633)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.alfresco.web.app.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:63)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.eisenvault.autoMailgenerate.CreateUserHandler]: Constructor threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1031)
... 23 more
Caused by: java.lang.NullPointerException
at com.eisenvault.autoMailgenerate.CreateUserHandler.<init>(CreateUserHandler.java:30)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148)
... 25 more
最佳答案
这可能是因为
private ServiceRegistry getServiceRegistry() {
// TODO Auto-generated method stub
return null;
}
和
private PersonService personService = getServiceRegistry()
.getPersonService();
结果，抛出了NPE。
关于java - 如何使露天的以下代码正常工作？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40526757/