ognl.OgnlException: target is null for setProperty(null, "id" [Ljava.l

ognl.OgnlException: target is null for setProperty(null, "id", [Ljava.lang.Strin
源码：ReqTask model类里面有个Project model类，jsp页面需要选择project的id

private ReqTask reqTask;private Project project=new Project();