HttpClient的使用模式：

1. 创建一个HttpClent

2.实例化新的HTTP方法，比如PostMethod 或 GetMethod

3.设置HTTP参数名称/值

4.使用HttpClent执行HTTP调用

5.处理Http响应

import java.io.IOException;import java.io.InputStream;import java.net.URLEncoder;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.StatusLine;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.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import com.itheima.httpclient.utils.Utils;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {	Handler handler = new Handler(){		@Override		public void handleMessage(android.os.Message msg) {			Toast.makeText(MainActivity.this, (String)msg.obj, 0).show();		}	};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    //get方法    public void get(View v){    	EditText et_name = (EditText) findViewById(R.id.et_name);    	EditText et_pass = (EditText) findViewById(R.id.et_pass);    	    	final String name = et_name.getText().toString();    	final String pass = et_pass.getText().toString();    	    	    	Thread t = new Thread(){    		@Override    		public void run() {    			String path = "http://192.168.13.13/Web/servlet/CheckLogin?name=" + URLEncoder.encode(name) + "&pass=" + pass;    	    	//使用httpClient框架做get方式提交    	    	//1.创建HttpClient对象    	    	HttpClient hc = new DefaultHttpClient();    	    	    	    	//2.创建httpGet对象，构造方法的参数就是网址    	    	HttpGet hg = new HttpGet(path);    	    	    	    	//3.使用客户端对象，把get请求对象发送出去    	    	try {    				HttpResponse hr = hc.execute(hg);    				//拿到响应头中的状态行    				StatusLine sl = hr.getStatusLine();    				if(sl.getStatusCode() == 200){    					//拿到响应头的实体    					HttpEntity he = hr.getEntity();    					//拿到实体中的内容，其实就是服务器返回的输入流    					InputStream is = he.getContent();    					String text = Utils.getTextFromStream(is);    					    					//发送消息，让主线程刷新ui显示text    					Message msg = handler.obtainMessage();    					msg.obj = text;    					handler.sendMessage(msg);    				}    			} catch (Exception e) {    				// TODO Auto-generated catch block    				e.printStackTrace();    			}    		}    	};    	t.start();    	    }    //post方法    public void post(View v){    	EditText et_name = (EditText) findViewById(R.id.et_name);    	EditText et_pass = (EditText) findViewById(R.id.et_pass);    	    	final String name = et_name.getText().toString();    	final String pass = et_pass.getText().toString();    	    	Thread t = new Thread(){    		@Override    		public void run() {    			String path = "http://192.168.13.13/Web/servlet/CheckLogin";    	    	//1.创建客户端对象    	    	HttpClient hc = new DefaultHttpClient();    	    	//2.创建post请求对象    	    	HttpPost hp = new HttpPost(path);    	    	    	    	//封装form表单提交的数据    	    	BasicNameValuePair bnvp = new BasicNameValuePair("name", name);    	    	BasicNameValuePair bnvp2 = new BasicNameValuePair("pass", pass);    	    	List
    
      parameters = new ArrayList
     
      ();    	    	//把BasicNameValuePair放入集合中    	    	parameters.add(bnvp);    	    	parameters.add(bnvp2);    	    	    	    	try {    	    		//要提交的数据都已经在集合中了，把集合传给实体对象    		    	UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters, "utf-8");    		    	//设置post请求对象的实体，其实就是把要提交的数据封装至post请求的输出流中    		    	hp.setEntity(entity);    		    	//3.使用客户端发送post请求    				HttpResponse hr = hc.execute(hp);    				if(hr.getStatusLine().getStatusCode() == 200){    					InputStream is = hr.getEntity().getContent();    					String text = Utils.getTextFromStream(is);    					    					//发送消息，让主线程刷新ui显示text    					Message msg = handler.obtainMessage();    					msg.obj = text;    					handler.sendMessage(msg);    				}    			} catch (Exception e) {    				// TODO Auto-generated catch block    				e.printStackTrace();    			}    		}    	};    	t.start();    	    }}
     
    

Utils方法：

import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;public class Utils {	public static String getTextFromStream(InputStream is){				byte[] b = new byte[1024];		int len = 0;		ByteArrayOutputStream bos = new ByteArrayOutputStream();		try {			while((len = is.read(b)) != -1){				bos.write(b, 0, len);			}			String text = new String(bos.toByteArray());			bos.close();			return text;		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		}		return null;	}}