/**
* @param transition
* @param processInstance
* @return 返回下一可用任务节点(任务节点/结束节点);
*/
public org.jbpm.graph.def.Node getNextTaskNode(Transition transition,
ProcessInstance processInstance,JbpmContext cxt) {
System.out.println("Find Next-Node...");
long processDefinitionID = processInstance.getProcessDefinition()
.getId();

String regex = getNodeInfo(processDefinitionID, getGBK(transition
.getTo().getName()));
//流程已结束．
        if(regex.equals("0")){
        System.out.println("找到流程结束节点．");      
            return (new org.jbpm.graph.node.EndState());
        }
// 如果是任务节点
if (regex.equals("7")) {

TaskNode task = (TaskNode)cxt.getSession().load(TaskNode.class, transition.getTo());
return task;
}
if (regex == null) {
return null;
} else {
ExecutionContext ec = new ExecutionContext(processInstance.getRootToken());
Transition nextTransition = null;

if (regex.startsWith("decision:")) {
String express = regex.substring(regex.indexOf("decision:") + 9, regex.length());
System.out.println("getNextTaskNode-Decision表达式："+express);
String lev = JbpmExpressionEvaluator.evaluate(express, ec).toString();
nextTransition = transition.getTo().getLeavingTransition(lev);
System.out.println("getNextTaskNode-Decision表达式　分析结果："+nextTransition.getName());
} else {
nextTransition = transition.getTo().getDefaultLeavingTransition();
System.out.println("getNextTaskNode-Decision　默认"+nextTransition.getName());
}
return getNextTaskNode(nextTransition, processInstance,cxt);

}

}

这个方法,返回流程的一下可用.任务节点.