进入正题：
1、待解析的XML:
<?xml version="1.0" encoding="utf-8"?> <mobile> <Response> <list> <item> <id>39</id> <username>user1</username> <content>content1</content> <flag>1</flag> <urlstr>20140103013946_jygy.amr</urlstr> </item> <item> <id>38</id> <username>user2</username> <content>content2</content> <flag>3</flag> <urlstr>20140103013621_jygy.jpg</urlstr> </item> </list> </Response> </mobile>
2、根据上面的XML定义实体
Item.java
public class Item {
private String id;
private String username;
private String content;
private String flag;
private String urlstr;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getFlag() {
return flag;
}
public void setFlag(String flag) {
this.flag = flag;
}
public String getUrlstr() {
return urlstr;
}
public void setUrlstr(String urlstr) {
this.urlstr = urlstr;
}
@Override
public String toString() {
return "Item [id=" + id + ", username=" + username + ", content="
+ content + ", flag=" + flag + ", urlstr=" + urlstr + "]";
}
}
ItemList.java
public class ItemList {
public ArrayList<Item> itemList;
public ItemList() {
itemList = new ArrayList<Item>();
}
public ArrayList<Item> getItemList() {
return itemList;
}
public void setItemList(ArrayList<Item> itemList) {
this.itemList = itemList;
}
@Override
public String toString() {
return "ItemList [itemList=" + itemList + "]";
}
}
3、解析器实现
public class GetItemListHandler extends DefaultHandler {
private ItemList result;
private final String TAG_ITEM = "item";
boolean isItem;
private final String TAG_ID = "id";
boolean isId;
private final String TAG_USERNAME = "username";
boolean isUsername;
private final String TAG_CONTENT = "content";
boolean isContent;
private final String TAG_FLAG = "flag";
boolean isFlag;
private final String TAG_USRSTR = "urlstr";
boolean isUrlstr;
private Item item;
private String curValue = "";
private String curTag = "";
public GetItemListHandler() {
super();
result = new ItemList();
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
super.startElement(uri, localName, qName, attributes);
Debug.print(GetItemListHandler.class, "uri=" + uri + " localName="
+ localName + " qName=" + qName + " attributes=" + attributes);
if (TAG_ITEM.equals(localName)) {
isItem = true;
item = new Item();
} else if (TAG_ID.equals(localName)) {
isId = true;
} else if (TAG_USERNAME.equals(localName)) {
isUsername = true;
} else if (TAG_CONTENT.equals(localName)) {
isContent = true;
} else if (TAG_FLAG.equals(localName)) {
isFlag = true;
} else if (TAG_USRSTR.equals(localName)) {
isUrlstr = true;
}
curValue = "";
curTag = localName;
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
super.endElement(uri, localName, qName);
handleElementValue(curTag, curValue);
Debug.print(GetItemListHandler.class, "uri=" + uri + " localName="
+ localName + " qName=" + qName);
if (TAG_ITEM.equals(localName)) {
isItem = false;
if (item != null) {
result.getItemList().add(item);
Debug.print(GetItemListHandler.class, "item="+item.toString());
item = null;
}
} else if (TAG_ID.equals(localName)) {
isId = false;
} else if (TAG_USERNAME.equals(localName)) {
isUsername = false;
} else if (TAG_CONTENT.equals(localName)) {
isContent = false;
} else if (TAG_FLAG.equals(localName)) {
isFlag = false;
} else if (TAG_USRSTR.equals(localName)) {
isUrlstr = false;
}
curTag = "";
}
protected void handleElementValue(String tag, String value) {
if (!TextUtils.isEmpty(value) && !TextUtils.isEmpty(tag)) {
// 必须是在item里面才处理
if (isItem && item != null) {
if (isId) {
item.setId(value);
} else if (isUsername) {
item.setUsername(value);
} else if (isContent) {
item.setContent(value);
} else if (isFlag) {
item.setFlag(value);
} else if (isUrlstr) {
item.setUrlstr(value);
}
}
}
}
@Override
public final void characters(char[] ch, int start, int length)
throws SAXException {
String str = null;
try {
str = new String(ch, start, length);
} catch (Exception e) {
}
Debug.print(GetItemListHandler.class, "str=" + str);
curValue = str;
}
public ItemList getResult() {
return result;
}
public void setResult(ItemList result) {
this.result = result;
}
}
4、开始解析测试
public class MainActivity extends Activity {
private SAXParser saxParser;
private GetItemListHandler listHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
saxParser = getSAXParser();
listHandler=new GetItemListHandler();
try{
AssetManager am = getAssets();
InputStream is = am.open("demo.xml");
saxParser.parse(is,
listHandler);
for(Item item:listHandler.getResult().getItemList()){
Debug.print(MainActivity.class, "item="+item.toString());
}
}catch(Exception e){
Debug.print(MainActivity.class, "e="+e.toString());
}
}
private SAXParser getSAXParser() {
if (saxParser == null) {
// 创建sax解析器
SAXParserFactory spf = SAXParserFactory.newInstance(); // 初始化sax解析器
try {
saxParser = spf.newSAXParser();
} catch (ParserConfigurationException e) {
// e.printStackTrace();
} catch (SAXException e) {
// e.printStackTrace();
}
}
return saxParser;
}
}
例子比较简单,可以直接看源码,有日志输出,看看日志基本上可以把SAX解析的流程整理清楚,代码写的比较急,比较粗糙,希望能够抛砖引玉
http://www.eoeandroid.com/forum.php?mod=attachment&aid=MTEzMzE3fGFlNDQyY2I4fDEzODg3NjI0NTJ8MTY3NDJ8MzIwMjQ5
声明：本人所有随笔全部原创,eoe论坛账号mei_ping89
