瘋狂

1. Action其實是一個POJO,所以我們可以直接把Action生成一個XML.只要把Result Type設為xslt就可以了:
      <action name="XmlModel" class="cpu.XmlModelAction">
            <result name="success" type="xslt" />
      </action>
里面包含了Action的所有屬性,還有Locale等信息. 可以在瀏覽器里輸入http://localhost:8080/XXX/XXX/XmlModel.action來看.

2. 為了定制自己想要的XML,我們可以輸入參數來輸出自己想要的Action的某個屬性(屬性可以是一個List).
      <action name="XmlModel" class="cpu.XmlModelAction">
            <result name="success" type="xslt">
                  <param name=”exposedValue”>modelList</param>
            </result>
      </action>

3. 如果有多于一個屬性呢.加個大括號圍起來
      <action name="XmlModel" class="cpu.XmlModelAction">
            <result name="success" type="xslt">
                  <param name=”exposedValue”>{modelList, type}</param>
            </result>
      </action>

4. 以上三個方法都是由Action 來控制生成格式.那么對于我們這種控制欲很強的人來說并不滿足,最好是由我們自己來定義生成樣子.那么這時我們就要做的就是在屬性里生成一個 org.w3c.dom.Document屬性.注意:不要用org.dom4j.Document類.要不會出現轉化錯誤,死得很慘.
      <action name="XmlModel" class="cpu.XmlModelAction">
      <result name="success" type="xslt">
            <param name="exposedValue">xmlDoc</param>
      </result>
      </action>
上面的xmlDoc就是 Action里的org.w3c.dom.Document類型.

5. 我只會用并且非要用org.dom4j.Document類怎么辦? 那就在最后轉化成 org.w3c.dom.Document:

 import java.io.ByteArrayInputStream;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
public class XmlUtil {
private XmlUtil() {
}
public static org.w3c.dom.Document XmlString2W3cDom(String xml)
throws SAXException, IOException, ParserConfigurationException {
byte[] byteArray = xml.getBytes("UTF-8");
ByteArrayInputStream baos = new ByteArrayInputStream(byteArray);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
org.w3c.dom.Document doc = factory.newDocumentBuilder().parse(baos);
return doc;
}
public static org.dom4j.Document W3c2Dom4j(org.w3c.dom.Document doc) {
if (doc == null) {
return (null);
}
org.dom4j.io.DOMReader xmlReader = new org.dom4j.io.DOMReader();
return (xmlReader.read(doc));
}
}

Action里加上一句: xmlDoc = Xmlutil.XmlString2W3cDom(dom4jDoc.asXML());
上面的xmlDoc就是 Action里的org.w3c.dom.Document類型.

6. 用org.dom4j.dom.DOMDocumentFactory()來建立 Document.而不要用DocumentHelper.createDocument()來產生.最后直接cast一下.

    public String execute() throws UnsupportedEncodingException, ParserConfigurationException, SAXException, IOException {
InfoCpuService cpuSvc = null;
cpuSvc = (InfoCpuService) ServiceLocator.getInstance().getService(InfoCpuService.class);
modelList = cpuSvc.getModels(prodBrand);
log.info(ReflectionToStringBuilder.toString(this));
org.dom4j.Document dom4jDoc = new org.dom4j.dom.DOMDocumentFactory().createDocument();
Element root = dom4jDoc.addElement("root");
root.addAttribute("prodType", "CPU");
for (Object o : modelList) {
root.addElement("model").addAttribute("name", (String) o);
}
//xmlDoc = XmlUtil.XmlString2W3cDom(doc.asXML());
xmlDoc = (Document) dom4jDoc;
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/xml;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
return SUCCESS;
}

其中三句代碼是為了防止生成中文亂碼
   HttpServletResponse response = ServletActionContext.getResponse();
   response.setContentType("text/xml;charset=UTF-8");
   response.setHeader("Cache-Control", "no-cache");

7. 在action中返回類型最好設置為import org.w3c.dom.Document;

private Document retXML;

配置格式為：