08-03 网络通信（UDP） URL XML解析器 JSON、DOM、SAX 枚举

//**MySend**
public class MySend {
public static void main(String[] args) {
try {
DatagramSocket send=new DatagramSocket();
DatagramSocket receiver=new DatagramSocket(8080);
Scanner scanner=new Scanner(System.in);

while(true){
String s=scanner.next();
byte[] array=s.getBytes();
System.out.println("Send:"+s);
DatagramPacket packet=new DatagramPacket(array, array.length, InetAddress.getByName("192.168.0.141"), 8088);
send.send(packet);

byte[] receiverArray=new byte[1024];
DatagramPacket packetReceiver=new DatagramPacket(receiverArray, 1024);
receiver.receive(packetReceiver);
byte[] date=packetReceiver.getData();
System.out.println("Send接收到的数据:"+new String(date,0,date.length));
}

} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//**MyServer**
public class MyReceiver {
public static void main(String[] args) {
try {
DatagramSocket receiver=new DatagramSocket(8088);
DatagramSocket send=new DatagramSocket();
Scanner scanner=new Scanner(System.in);

while(true){
byte[] array=new byte[1024];
DatagramPacket packet=new DatagramPacket(array,1024);
receiver.receive(packet);
byte[] date=packet.getData();
System.out.println("Receiver接收到的数据："+new String(date,0,date.length));

String sendString=scanner.next();
byte[] sendByte=sendString.getBytes();
System.out.println("Receiver:"+sendString);
DatagramPacket packetSend=new DatagramPacket(sendByte, sendByte.length, InetAddress.getByName("192.168.0.141"), 8080);
send.send(packetSend);
}

} catch (SocketException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

//**JSON解析器**
public class Test03 {
public static void main(String[] args) {
String json=createJSON();
JSONObject obj=JSONObject.fromObject(json);
System.out.println(obj.getString("city"));
JSONObject today=obj.getJSONObject("today");
JSONArray array=today.getJSONArray("index");
for (int i = 0; i < array.size(); i++) {
JSONObject obj1=array.getJSONObject(i);
System.out.println(obj1.get("name"));
}
}
private static String createJSON() {
JSONObject obj=new JSONObject();
obj.put("city", "北京");
obj.put("cityid", "001");
JSONObject today=new JSONObject();
today.put("date", "2015-08-03");
today.put("week", "星期一");
JSONArray array=new JSONArray();
JSONObject index1=new JSONObject();
index1.put("name", "感冒");
JSONObject index2=new JSONObject();
index2.put("name", "炎热");
JSONObject index3=new JSONObject();
index3.put("name", "防晒");
array.add(index1);
array.add(index2);
array.add(index3);
today.put("index", array);
obj.put("today", today);
System.out.println(obj.toString());
return obj.toString();
}
}
//**DOM解析器**
public class DOMTest {
public static void main(String[] args) {
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder=factory.newDocumentBuilder();
Document document=builder.parse("d:\\11.txt");
NodeList list=document.getElementsByTagName("Weather");
Node node=list.item(0);
Node child=node.getFirstChild();
Node next=child.getNextSibling();
while(next!=null){
if(next.getNodeType()==Node.ELEMENT_NODE){
Node content=next.getFirstChild();
if(content!=null){
System.out.println(next.getFirstChild().getNodeValue().trim());
}
}
next=next.getNextSibling();
}
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//**SAX解析器**
public class MySAXHandler extends DefaultHandler{
boolean isArrive=true;

@Override
public void characters(char[] ch, int start, int length) thro
baee
ws SAXException {
super.characters(ch, start, length);
if(isArrive){
System.out.println("我终于查到这个xcz的值了"+new String(ch,start,length));
}
System.out.println(new String(ch,start,length));
}

@Override
public void endDocument() throws SAXException {
super.endDocument();
System.out.println("解析文档结束");
}

@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
super.endElement(uri, localName, qName);
System.out.println(localName+"标签结束"+qName);
isArrive=false;
}

@Override
public void startDocument() throws SAXException {
super.startDocument();
System.out.println("解析文档开始");
}

@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
super.startElement(uri, localName, qName, attributes);
isArrive=qName.equals("xcz");
System.out.println(localName+"标签开始"+qName);
}
}
public class Test {
public static void main(String[] args) {
SAXParserFactory factory=SAXParserFactory.newInstance();
try {
SAXParser parser=factory.newSAXParser();
MySAXHandler handler=new MySAXHandler();
parser.parse(new File("d:\\11.txt"), handler);
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

public class Test {
public static void main(String[] args) {

//百度网址
try {
URL url=new URL("http://www.baidu.com/");
InputStream is=url.openStream();
InputStreamReader isr=new InputStreamReader(is);
BufferedReader br=new BufferedReader(isr);
String line=br.readLine();
while(line!=null){
System.out.println(line);
line=br.readLine();
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

try {
URL url=new URL("http://g.hiphotos.baidu.com/baike/c0%3Dbaike150%2C5%2C5%2C150%2C50/sign=cc809c888bd4b31ce4319ce9e6bf4c1a/54fbb2fb43166d22c927925f462309f79152d2ad.jpg");
File fileImp=new File("d://z.jpg");
while(!fileImp.exists()){
fileImp.createNewFile();
}
OutputStream os=new FileOutputStream(fileImp);
InputStream is=url.openStream();
byte[] array=new byte[1024];
int i=is.read(array);
while(i!=-1){
os.write(array, 0, i);
i=is.read(array);
}
os.flush();
os.close();
is.close();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

public enum Sex {
MALE,FEMALE
}
public class Student {
private int age;
private Sex sex;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Sex getSex() {
return sex;
}
public void setSex(Sex sex) {
this.sex = sex;
}
}