android客户端与javaweb服务器端数据通信-Post-键值对

android studio端

package com.example.z_t.mytest3;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;

import java.io.IOException;
import java.io.StringReader;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class FirstActivity extends AppCompatActivity {
    private EditText username;
    private EditText password;
    private String uname;
    private String pwd;
    private String result;
    private boolean res;


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

        username = (EditText)findViewById(R.id.username);
        password = (EditText)findViewById(R.id.password);

        Button button = (Button)findViewById(R.id.login);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                uname = username.getText().toString();
                pwd = password.getText().toString();
                Log.i("First", uname);
                Log.i("First", pwd);

//                getHttp(uname,pwd, new Callback() {
//                    @Override
//                    public void onFailure(Call call, IOException e) {
//
//                    }
//
//                    @Override
//                    public void onResponse(Call call, Response response) throws IOException {
//                        String responseData = response.body().string();
//                        int ii =responseData.length();
//                        Log.i("First", responseData);
//                        Log.i("First", String.valueOf(ii));
//                        if (responseData.equals("true")){
//                            res=true;
//                        }else {
//                            res=false;
//                        }
//                        Log.i("First", String.valueOf(res));
//                        runOnUiThread(new Runnable() {
//                            @Override
//                            public void run() {
//                                if (res){
//                                    Toast.makeText(FirstActivity.this, "请求成功", Toast.LENGTH_SHORT).show();
//                                    Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
//                                    startActivity(intent);
//                                }else {
//                                    Toast.makeText(FirstActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
//                                }
//                            }
//                        });
//                    }
//                });
                postHttp(uname, pwd, new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {

                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        String responseData = response.body().string();
                        int ii =responseData.length();
                        Log.i("First", responseData);
                        Log.i("First", String.valueOf(ii));
                        if (responseData.equals("true")){
                            res=true;
                    }else {
                        res=false;
                    }
                        Log.i("First", String.valueOf(res));
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                if (res){
                                    Toast.makeText(FirstActivity.this, "请求成功", Toast.LENGTH_SHORT).show();
                                    Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
                                    startActivity(intent);
                                }else {
                                    Toast.makeText(FirstActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
                                }
                            }
                        });

                    }
                });



            }
        });
    }

    private void getHttp(String username,String password,okhttp3.Callback callback) {
        OkHttpClient client = new OkHttpClient();

        String url = "http://192.168.150.1:8080/test2/login?name="+username+"&pwd="+password;
        Log.i("First", url);
        Request request = new Request.Builder()
                .url(url)
                .method("GET",null)
                .build();
        Call call = client.newCall(request);
        call.enqueue(callback);


    }

    private String parseXMLWithPull(String xmlData) {
        try{
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            XmlPullParser xmlPullParser = factory.newPullParser();
            xmlPullParser.setInput(new StringReader(xmlData));
            int eventType = xmlPullParser.getEventType();
            while (eventType!=XmlPullParser.END_DOCUMENT){
                String nodeName = xmlPullParser.getName();
                switch (eventType){
                    case XmlPullParser.START_TAG:{
                        if ("td".equals(nodeName)){
                            result = xmlPullParser.nextText();
                        }
                        break;
                    }
                    case XmlPullParser.END_TAG:{
                        if ("tr".equals(nodeName)){
                            Log.i("First",result);
                        }
                    }
                    default:break;
                }
                eventType = xmlPullParser.next();
            }


                }catch (Exception e){
            e.printStackTrace();
        }
        return result;
    }


        private void postHttp(String username,String password,okhttp3.Callback callback){
            OkHttpClient client = new OkHttpClient();
            RequestBody body = new FormBody.Builder()
                    .add("username",username)
                    .add("password",password)
                    .build();
            Request request = new Request.Builder()
                    .url("http://192.168.150.1:8080/test2/login")
                    .post(body)
//                    .addHeader("content-type","multipart/form-data")
                    .build();
            Call call = client.newCall(request);
            call.enqueue(callback);
        }


}

服务器端

package servlet;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

/**
 * Servlet implementation class login
 */
@WebServlet("/login")
public class login extends HttpServlet {
	private String name=null;
	private String pwd=null;
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public login() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		 name=request.getParameter("name");         
         pwd=request.getParameter("pwd");  
        
        response.setContentType("text/html");
        response.setCharacterEncoding("utf-8");
        PrintWriter out = response.getWriter();
        
        System.out.println("name:"+name+"   pwd:"+pwd);  
        System.out.println(name.length());  
        if(("admin").equals(name)&&("admin").equals(pwd)){
        	System.out.println("true");  
        	out.print("true");
        	
        }else{
        	System.out.print("false");
        	out.print("false");
        }
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html");
        response.setCharacterEncoding("utf-8");
        
         name = request.getParameter("username");
         pwd = request.getParameter("password");
        System.out.println("name:"+name+"   pwd:"+pwd);  
        System.out.println(name.length());  
        
        PrintWriter out = response.getWriter();
        
        if(("admin").equals(name)&&("admin").equals(pwd)){
        	System.out.println("true");  
        	out.print("true");
        	
        }else{
        	System.out.print("false");
        	out.print("false");
        }
        
        

        
	}
	
	


}