android post请求

参考文章：http://blog.csdn.net/lotusyangjun/article/details/22292445

http://blog.csdn.net/withiter/article/details/19908679

代码如下：

package tdrhedu.com.edugame;
import android.content.Intent;
import android.graphics.Paint;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by zhaoliang on 2016/6/15.
 */
public class Login2Activity extends AppCompatActivity {
    private static final String TAG = "Login2Activity";
    Button mLogin = null;
    TextView mForgetPassword = null;
    TextView mJustSee = null;
    EditText mAccountName, mAccountPasswd;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login2);

        View v = findViewById(R.id.mLoginGuide);//找到你要设透明背景的layout 的id
        v.getBackground().setAlpha(70);//0~255透明度值

        //TextView tv = (TextView)findViewById(R.id.find_password);
        //tv.setPaintFlags(tv.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);

        mLogin = (Button) findViewById(R.id.account_login);
        mLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "click");

                String postReceiverUrl = "http://112.126.64.235:9090/company/get";
                Log.v(TAG, "postURL: " + postReceiverUrl);

                new Thread(new Runnable(){
                    @Override
                    public void run() {
                        mAccountName = (EditText)findViewById(R.id.account_name);
                        mAccountPasswd = (EditText)findViewById(R.id.account_password);
                        String username = mAccountName.getText().toString();
                        String password = mAccountPasswd.getText().toString();
                        Map<String, String> params = new HashMap<String, String>();
                        params.put("username", username);
                        params.put("password", password);
                        String result = submitPostData(params, "utf-8");
                        Log.v(TAG, "result: " + result);
                    }
                }).start();

                //Intent i = new Intent(Login2Activity.this, PannelActivity.class);
                //startActivity(i);

            }
        });

        /*mForgetPassword = (TextView) findViewById(R.id.find_password);
        mForgetPassword.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Intent i = new Intent(Login2Activity.this, ForgotActivity.class);
                startActivity(i);
            }
        });

        mJustSee = (TextView) findViewById(R.id.just_see);
        mJustSee.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });*/

    }

    /*
     * Function  :   发送Post请求到服务器
     * Param     :   params请求体内容，encode编码格式
     * Author    :   [email protected]
     */
    public static String submitPostData(Map<String, String> params, String encode) {

        byte[] data = getRequestData(params, encode).toString().getBytes();//获得请求体
        try {
            URL url = new URL("http://112.126.64.235:9090/company/get");
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setConnectTimeout(3000);  //设置连接超时时间
            httpURLConnection.setDoInput(true);                  //打开输入流，以便从服务器获取数据
            httpURLConnection.setDoOutput(true);                 //打开输出流，以便向服务器提交数据
            httpURLConnection.setRequestMethod("POST");   //设置以Post方式提交数据
            httpURLConnection.setUseCaches(false);        //使用Post方式不能使用缓存
            //设置请求体的类型是文本类型
            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            //设置请求体的长度
            httpURLConnection.setRequestProperty("Content-Length", String.valueOf(data.length));
            //获得输出流，向服务器写入数据
            OutputStream outputStream = httpURLConnection.getOutputStream();
            outputStream.write(data);

            int response = httpURLConnection.getResponseCode();            //获得服务器的响应码
            if(response == HttpURLConnection.HTTP_OK) {
                InputStream inptStream = httpURLConnection.getInputStream();
                return dealResponseResult(inptStream);                     //处理服务器的响应结果
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

    /*
     * Function  :   封装请求体信息
     * Param     :   params请求体内容，encode编码格式
     * Author    :   [email protected]
     */
    public static StringBuffer getRequestData(Map<String, String> params, String encode) {
        StringBuffer stringBuffer = new StringBuffer();        //存储封装好的请求体信息
        try {
            for(Map.Entry<String, String> entry : params.entrySet()) {
                stringBuffer.append(entry.getKey())
                        .append("=")
                        .append(URLEncoder.encode(entry.getValue(), encode))
                        .append("&");
            }
            stringBuffer.deleteCharAt(stringBuffer.length() - 1);    //删除最后的一个"&"
        } catch (Exception e) {
            e.printStackTrace();
        }
        return stringBuffer;
    }

    /*
     * Function  :   处理服务器的响应结果（将输入流转化成字符串）
     * Param     :   inputStream服务器的响应输入流
     * Author    :   [email protected]
     */
    public static String dealResponseResult(InputStream inputStream) {
        String resultData = null;      //存储处理结果
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        byte[] data = new byte[1024];
        int len = 0;
        try {
            while((len = inputStream.read(data)) != -1) {
                byteArrayOutputStream.write(data, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        resultData = new String(byteArrayOutputStream.toByteArray());
        return resultData;
    }

}

完毕。