J2ME 中的无线通信协议

1. package HttpConnection;
2. import java.io.DataInputStream;
3. import java.io.IOException;
5. import javax.microedition.io.ConnectionNotFoundException;
6. import javax.microedition.io.Connector;
7. import javax.microedition.io.HttpConnection;
8. /**********************************************************************
9.  * 
10.  * @author 
11.  *Description:发送请求消息，返回字符串数据
12. ***********************************************************************/
14. public class HttpStringThread implements Runnable{
15.     String host;
16.     String parameter;
17.     HttpConnection hc;
18.     DataInputStream dis;
19.     public String result;
20.     String canvas;
21.     String resURL;
22.     TaskInterface ti;
23.     public HttpStringThread(String resURL,TaskInterface ti){
24.         this.resURL = resURL;
25.         this.canvas=null;
26.         if(resURL.indexOf("/") == -1){
27.             host = resURL;
28.             parameter = "";
29.         }else{
30.             host = resURL.substring(0,resURL.indexOf("/"));
31.             parameter = resURL.substring(resURL.indexOf("/"));
32.         }
33.         this.ti=ti;
34.     }
35.     public HttpStringThread(String resURL){
36.         ti=null;
37.         this.resURL = resURL;
38.         this.canvas=null;
39.         if(resURL.indexOf("/") == -1){
40.             host = resURL;
41.             parameter = "";
42.         }else{
43.             host = resURL.substring(0,resURL.indexOf("/"));
44.             parameter = resURL.substring(resURL.indexOf("/"));
45.         }
46.     }
47.     public HttpStringThread(String resURL,TaskInterface ti,String canvas){
48.         this.resURL = resURL;
49.         this.canvas=canvas;
50.         if(resURL.indexOf("/") == -1){
51.             host = resURL;
52.             parameter = "";
53.         }else{
54.             host = resURL.substring(0,resURL.indexOf("/"));
55.             parameter = resURL.substring(resURL.indexOf("/"));
56.         }
57.         this.ti=ti;
58.     }
59.     public void run() {
60.         // TODO 自动生成方法存根
61.         try {
62.             /*
63.             hc = (HttpConnection)Connector.open("http://" + "10.0.0.172:80"    //注，这里重点，代表某种机子通信需要代理
64.             + parameter,3,true);                                                                              //服务地址，才能实现无线通信，
65.             hc.setRequestProperty("X-Online-Host",host);
66.             hc.setRequestProperty("Connection","close");
67.             */
68.             
69.             
70.                 hc = (HttpConnection)Connector.open("http://"+resURL);  //这种通信代表某和机子已经包含有代理服务地址
71.                 hc.setRequestMethod(HttpConnection.GET);                  //设置
72.                 dis = hc.openDataInputStream();
73.                 int k;
74.                 byte[] data = new byte[10240];
75.                 int i = 0;
76.                 while((k = dis.read()) != -1){
77.                     data[i] = (byte)k;
78.                     i++;
79.                 }
80.                 String s = new String(data,0,i);
81.                 result=s;
82.                 System.out.println("This is HttpStringThread");
83.                 
84.             }catch(NullPointerException e){
85.                 result="CommunicationError";
86.             }catch(ConnectionNotFoundException e){
87.                 result="CommunicationError";
88.             }catch(IOException e){
89.                 result="CommunicationError";
90.             }catch(Exception e){
91.                 result="CommunicationError";
92.             }finally{
93.                 System.out.println(result);
94.                 try {
95.                     hc.close();
96.                     if(dis!=null){
97.                         dis.close();
98.                     }
99.                     
100.                 } catch (IOException e) {
101.                     // TODO 自动生成 catch 块
102.                     e.printStackTrace();
103.                 }
104.                 if(this.canvas!=null){
105.                     ti.data(result, this.canvas);
106.                 }else{
107.                     ti.data(result);
108.                 }
109.             }
110.     }
111. }