分享两个模拟get和post方法的工具类，让应用能够与服务器进行数据交互

　　很久没有码字了，今天跟大家分享一个模拟get和post方法的工具类，在安卓应用中很多都需要跟服务器进行数据交互，这需要两方面的配合，首先服务器端会给应用提供一些数据交互的接口，可是怎样在应用中去调用呢？这就需要用到get和post方法了，下面是自己总结并且一直在用的两个工具类，请看代码：

用来模拟get方法：

package com.standopen.exceptionsdk;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.content.Context;
import android.os.Handler;
import android.os.Message;


public class doGet {

    private Context ctx;
    private String url;
    private thread_callback callback;

    public doGet(Context ctx, String url, thread_callback back) {
        this.ctx = ctx;
        this.url = url;
        this.callback = back;
        post_thread th = new post_thread(ctx, url);
        th.start();

    }

    public class post_thread extends Thread {
        private String url;
        private Context ctx;

        public post_thread(Context ctx, String url) {
            this.url = url;
            this.ctx = ctx;
        }

        Handler handler = new Handler() {

            @Override
            public void handleMessage(Message msg) {
                // TODO Auto-generated method stub
                super.handleMessage(msg);
                // int type = Integer.parseInt(msg.obj.toString());
                String back = msg.obj.toString();
                callback.callback(back);
            }
        };

        @Override
        public void run() {
            // TODO Auto-generated method stub
            super.run();
            String str = null;
            try {
                str = post(url);
                Message msg1 = handler.obtainMessage();
                msg1.obj = str;
                handler.sendMessage(msg1);

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

        }

        @Override
        public synchronized void start() {
            // TODO Auto-generated method stub
            super.start();
        }

        public String post(String url) throws ClientProtocolException,
                IOException {

            String str = "";
            HttpClient client = new DefaultHttpClient();
        
            HttpGet get = new HttpGet(url);
            HttpResponse response = client.execute(get);
            int code = response.getStatusLine().getStatusCode();
            if (code == 200) {
                InputStream is = response.getEntity().getContent();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int len = 0;
                if ((len = is.read(buffer)) != -1) {
                    baos.write(buffer, 0, len);
                }
                byte[] b = baos.toByteArray();
                is.close();
                baos.close();
                str = new String(b, "utf-8");
            
            
        }
            return str;
    }

}
}

用来模拟post方法：

package com.standopen.exceptionsdk;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import android.content.Context;
import android.os.Handler;
import android.os.Message;

public class doPost {

    private Context ctx;
    private String url;
    private thread_callback callback;
    private ArrayList<NameValuePair> data = null;

    public doPost(Context ctx, String url, ArrayList<NameValuePair> data,
            thread_callback back) {
        this.ctx = ctx;
        this.url = url;
        this.callback = back;
        this.data = data;
        post_thread th = new post_thread(ctx, url, data);
        th.start();

    }

    public class post_thread extends Thread {
        private String url;
        private Context ctx;

        private ArrayList<NameValuePair> data;

        public post_thread(Context ctx, String url,
                ArrayList<NameValuePair> data) {
            this.url = url;
            this.ctx = ctx;
            this.data = data;
        }

        Handler handler = new Handler() {

            @Override
            public void handleMessage(Message msg) {
                // TODO Auto-generated method stub
                super.handleMessage(msg);
                // int type = Integer.parseInt(msg.obj.toString());
                String back = msg.obj.toString();
                callback.callback(back);
            }
        };

        @Override
        public void run() {
            // TODO Auto-generated method stub
            super.run();
            String str = null;
            try {
                str = post(url);
                Message msg1 = handler.obtainMessage();
                msg1.obj = str;
                handler.sendMessage(msg1);

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

        }

        @Override
        public synchronized void start() {
            // TODO Auto-generated method stub
            super.start();
        }

        public String post(String url) throws ClientProtocolException,
                IOException {

            String str = "";
            HttpClient client = new DefaultHttpClient();
            HttpPost post = new HttpPost(url);
            post.setEntity(new UrlEncodedFormEntity(data, "utf-8"));
            HttpResponse response = client.execute(post);
            int code = response.getStatusLine().getStatusCode();
            if (code == 200) {
                InputStream is = response.getEntity().getContent();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int len = 0;
                if ((len = is.read(buffer)) != -1) {
                    baos.write(buffer, 0, len);
                }
                byte[] b = baos.toByteArray();
                is.close();
                baos.close();
                str = new String(b);

            }
            return str;
        }

    }
}

 用来数据回调的接口：

package com.standopen.exceptionsdk;

public interface thread_callback {
    public void callback(String back);
}

　　从数据库中获取到数据后，就要对数据进行解析，提取到需要的数据进行使用，这些也非常简单，下次再分享。