these codes in method of Struts2 Action
TaskQuery taskQuery = taskService.createTaskQuery().processDefinitionKey("leave").taskCandidateUser(UserUtil.getCurrentUserId());
List<Task> tasks = taskQuery.listPage(0, 10);
for (Task task : tasks) {
TaskEntity taskEntity = (TaskEntity) task;
System.out.println(taskEntity.getIdentityLinks());
}
in applicationContext.xml：
<!– activiti begin –>
<bean id="jdbcTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<property name="dataSource" ref="dataSource" />
<property name="transactionManager" ref="jdbcTransactionManager" />
<property name="databaseSchemaUpdate" value="false" />
<property name="jobExecutorActivate" value="false" />
<property name="deploymentResources" value="classpath*:/com/wsria/demo/activiti/*.bpmn20.xml"></property>
</bean>
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
<property name="processEngineConfiguration" ref="processEngineConfiguration" />
</bean>
<bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
<bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" />
<bean id="formService" factory-bean="processEngine" factory-method="getFormService" />
<bean id="identityService" factory-bean="processEngine" factory-method="getIdentityService" />
<bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" />
<bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" />
<bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" />
<!– activiti end –>
java.lang.NullPointerException at org.activiti.engine.impl.persistence.entity.TaskEntity.getIdentityLinks(TaskEntity.java:342) at com.wsria.demo.activiti.web.oa.leave.LeaveAction.runningList(LeaveAction.java:112) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254) at ………………
