struts2的ModelDriven

public class StudentAction extends BaseAction implements ModelDriven<StudentBO>,
		Preparable {

	private static final long serialVersionUID = 1L;
	@Resource
	private StudentService studentService;
	
	@Override
	public StudentBO getModel() {
		return student;
	}
	
	@Override
	public void prepare() throws Exception {
		student = new StudentBO();
	}

	public StudentService getStudentService() {
		return studentService;
	}

	public void setStudentService(StudentService studentService) {
		this.studentService = studentService;
	}

}

 

         当返回result前对业务对象修改了，但是值栈中对应的对象依然是之前的就值，若想在返回result之前刷新值栈中业务对象各个属性的根对象，需在该action中配置如下参数：

		<action name="studentAction"
			class="com.amouse.student.action.StudentAction">
			<interceptor-ref name="defaultStack">
				<!-- 渲染页面前刷新model在ValueStack的root的引用 -->
				<param name="modelDriven.refreshModelBeforeResult">
					true
				</param>
			</interceptor-ref>
			<result name="main">/pages/student/student.jsp</result>
			<result name="login">/pages/student/login.jsp</result>
			<result name="success">/pages/student/studentInfo.jsp</result>
		</action>