jbpm4很好的练习实例

package com.langsin.action; import java.util.List; import org.jbpm.api.ExecutionService; import org.jbpm.api.ProcessDefinition; import org.jbpm.api.ProcessInstance; import org.jbpm.api.RepositoryService; import org.jbpm.api.TaskService; import org.jbpm.api.task.Task; import com.langsin.util.JbpmUtil; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class ListItemsAction extends ActionSupport { private String username; private List<Task> tasks; private List<ProcessDefinition> processDefinitions; private List<ProcessInstance> processInstances; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public List<Task> getTasks() { return tasks; } public void setTasks(List<Task> tasks) { this.tasks = tasks; } public List<ProcessDefinition> getProcessDefinitions() { return processDefinitions; } public void setProcessDefinitions(List<ProcessDefinition> processDefinitions) { this.processDefinitions = processDefinitions; } public List<ProcessInstance> getProcessInstances() { return processInstances; } public void setProcessInstances(List<ProcessInstance> processInstances) { this.processInstances = processInstances; } @Override public String execute() throws Exception { TaskService taskService = JbpmUtil.getTaskService(); ExecutionService executionService = JbpmUtil.getExecutionService(); RepositoryService repositoryService = JbpmUtil.getRepositoryService(); this.username = (String) ActionContext.getContext().getSession().get( "username"); this.tasks = taskService.findPersonalTasks(username); this.processDefinitions = repositoryService .createProcessDefinitionQuery().list(); this.processInstances = executionService.createProcessInstanceQuery() .list(); return SUCCESS; } }