#副標=AJAX開發工具(3)
#大標=使用Google Web Toolkit開發RSS閱讀器(下)
#眉標=AJAX
#作者=文／沈炳宏

　　
========BOX 程式1=========
import com.runpc.ajax.RssReader.client.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.xml.parsers.*;

public class RssFeedParser extends DefaultHandler {
    private URL url;
    private List result;
    private Entry target;
    private StringBuffer text;
    private boolean inContent = false;
private SimpleDateFormat sdf = 
new SimpleDateFormat (
"EEE, d MMM yyyy HH:mm:ss Z", 
new Locale("en"));

public RssFeedParser(String urlstring) 
throws Exception{}

public List getPostings() throws Exception {}

public void startElement(String uri, 
String localName, 
String qName,Attributes attributes) {}

public void characters(char[] ch, int start, int length){}

public void endElement(String uri, String localName, 
String qName) {}
==========END===========


=========BOX 程式2========
public RssFeedParser(String urlstring) 
　　　　throws Exception {
        this.url = new URL(urlstring);
}
=========END============


======BOX 程式3========
public List getPostings() throws Exception {
        HttpURLConnection conn =
 (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.setUseCaches(false);
        conn.setDefaultUseCaches(false);
        InputStream is = conn.getInputStream();
        this.result = new LinkedList();
        SAXParser parser = 
SAXParserFactory.newInstance().newSAXParser();
        parser.parse(is, this);
        return result;
    }
==========END==========


=======BOX程式4=========
public void startElement(String uri, String localName, 
String qName,
        Attributes attributes) {
        if (!inContent) {
            this.text = new StringBuffer();
        } else {
            this.text.append("<").append(qName);
            int l = attributes.getLength();
            for (int i = 0; i < l; i++) {
this.text.append(" ").
append(attributes.getQName(i))
.append("=\"").append(attributes.getValue(i))
.append("\"");
            }
            this.text.append(">");
        }

if (("content".equals(qName)) || 
("description".equals(qName))) {
inContent = true;
        }

if (("item".equals(qName)) || 
("entry".equals(qName))) {
this.target = new Entry();
this.result.add(target);
        }
    }
=========End=========


=========box程式5===========
public void characters(char[] ch, int start, int length)
        throws SAXException {
this.text.append(ch, start, length);
}
=========end===========


=======box程式6=========
public void endElement(String uri,
String localName, String qName) {
        if (inContent) {
            this.text.append("</").
append(qName).append(">");
        }
        if (("item".equals(qName)) || 
("entry".equals(qName))) {
            this.target = null;
        }
        if (this.target != null) {
            if ("title".equals(qName)) {
this.target.setTitle(this.text.toString());
            }
            if ("id".equals(qName)) {
this.target.setExternalId(this.text.toString());
            }
            if ("link".equals(qName)) {
this.target.setExternalId(this.text.toString());
            }
            if (("description".equals(qName)) || 
("content".equals(qName))) {
this.target.setSummary(this.text.toString());
this.target.setContent(this.text.toString());
this.inContent = false;
            }
            if (("media:category".equals(qName)) || 
("dc:subject".equals(qName) || 
("category".equals(qName)))) {
this.target.setKeywords(this.text.toString());
            }            
            if ("author".equals(qName) ) {
this.target.setAuthor(this.text.toString());
            }
            if (("pubDate".equals(qName)) ||
 ("created".equals(qName))) {
                try {
Date date = sdf.parse(text.toString());
this.target.setCreationDate(date.getTime());
SimpleDateFormat sdf2 = 
new SimpleDateFormat("MMM d");
this.target.setFormattedDate(sdf2.format(date));
                } catch (Exception e) {
e.printStackTrace();
this.target.setCreationDate(System.currentTimeMillis());
                }
            }
        }
    }
===========end==========



========box程式7=======
<module>
  <inherits name="com.google.gwt.i18n.I18N"/>
</module>
=========end=========


=========box程式8========
public interface MyConstants extends Constants {
  String helloRUNPC();
  String goodbyeRUNPC();
}
==========end==========


========box程式9==========
#MyConstants.properties
helloRUNPC = hello, RUNPC
goodbyeRUNPC = goodbye, RUNPC

#MyConstants.properties.zh_TW
helloRUNPC = 你好, RUNPC
goodbyeRUNPC = 再見, RUNPC
==========end==========



=======box程式10=======
public void useMyConstants() {
  MyConstants myConstants =
 (MyConstants) GWT.create(MyConstants.class);
  Window.alert(myConstants.helloRUNPC());
}
========end=========



==========box程式11===========
var CurrentTheme = {
  highlightColor: "#FFFFFF",
  shadowColor: "#808080",
  errorColor: "#FF0000",
  errorIconSrc: "stopsign.gif"
};
==========end===========


=========box程式12=========
public void useThemeDictionary() {
  Dictionary theme = 
Dictionary.getDictionary("CurrentTheme");
  String highlightColor = theme.get("highlightColor");
  String shadowColor = theme.get("shadowColor");
  applyShadowStyle(highlightColor, shadowColor);
  String errorColor = theme.get("errorColor");
  String errorIconSrc = theme.get("errorIconSrc");
  Image errorImg = new Image(errorIconSrc);
}
=========end==========



========box程式13==========
i18nCreator -eclipse RUNPC
com.RUNPC.RSSReader.client.MyConstants

Created directory src
Created directory src\com\RUNPC\RSSReader\client
Created file src\com\RUNPC\RSSReader\client\
MyConstants.properties
Created file MyConstants-i18n.launch
MyConstants-i18n.cmd
==========end==========



=========box程式14========
<module>
  <inherits name="com.google.gwt.user.User"/>
  <inherits name="com.google.gwt.i18n.I18N"/>
  <!-- Traditional Chinese -->
  <extend-property name="locale" values="zh_TW"/>
  <!-- English language, independent of country -->
  <extend-property name="locale" values="en"/>
</module>
=========end===========


===========box程式15========
<html>
  <head>
<meta name="gwt:module" content="com.google.
gwt.examples.i18n.RSSReaderExample">
<meta name="gwt:property" content="locale=zh_TW">
  </head>
  <body>
    <script src="gwt.js"></script>
  </body>
</html>
=========end=========


========box程式16=======
public static native void alert(String msg) /*-{
  $wnd.alert(msg);
}-*/
========end===========