Webwork2使用经验四则

1.jar包中的taglib使用

WebLogic是不支持直接在jar包中使用taglib的,所以,一个在tomcat下运行正常的页面,在weblogic server下可能出错:

Parsing of JSP File '/globalList.jsp' failed:

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 /globalList.jsp(2): Could not parse deployment descriptor: java.io.IOException: cannot resolve 'webwork' into a valid tag library

probably occurred due to an error in /globalList.jsp line 2:

<%@ taglib prefix="ww" uri="webwork"%>

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Tue Jan 11 15:34:02 CST 2005

解决办法:在web.xml中加入下面的内容

<taglib>

<taglib-uri>webwork</taglib-uri>

<taglib-location>/WEB-INF/lib/webwork-2.1.jar</taglib-location>

</taglib>

2.model的构造

webwork是不负责为你构造model的,所以你的action中应该这样构造model:

private ModelInfo modelInfo=new ModelInfo();

如果你写 private ModelInfo modelInfo会报错的.

3.使用ioc

webwork的ioc也需要你自己构造要组建的对象,所以你的model中应该这样写:

public class ModelInfo {

 private List workList=new ArrayList();

 private String actionTypeEnglish="";

 private String actionType="";

 private String actionHref="";

 ..........

如果不对List做初始化,系统会报NullPointerException

4.传递到view的model

必须自己为传递到view的model赋值:

ModelInfo model=service.getList(orgId);

   modelInfo.getWorkList().addAll(model.getWorkList());

   modelInfo.setActionHref(model.getActionHref());

   modelInfo.setActionType(model.getActionType());

   modelInfo.setActionTypeEnglish(model.getActionTypeEnglish());

不调用set方法,传递到view的model将是空的.