Android 实现与Eclipse数据交互

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        //192.168.43.164   进入DOS密令 输入ipconfig 获取 --》 IPv4 地址（192.168.43.164）        //G160628_ServerForAndroid/login.do  Java jsp登录页面        String path="http://192.168.43.164:8080/G160628_ServerForAndroid/login.do";

Eclipse 获取与Android进行数据交互的类

package com.Zking.Servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class Servlet extends HttpServlet{  @Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {  String uname=req.getParameter("uname");    String upass=req.getParameter("upass");        String Result=null;

                     //从jsp界面获取的值    if("admin".equals(uname) && "123".equals(upass)){    Result="succeed";    System.out.println(Result);    }else{    Result="defeated";    System.out.println(Result);    }    PrintWriter pw=resp.getWriter();    pw.write(Result);    pw.close();}}

GET方式：

package com.example.g160628_android_32_commit_data;import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class MainActivity extends AppCompatActivity {    private EditText et_main_uname;    private EditText et_main_upass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);

        //账号        et_main_uname = (EditText) findViewById(R.id.et_main_uname);

         //密码

        et_main_upass = (EditText) findViewById(R.id.et_main_upass);    }

          //按钮点击执行方法    public void loginGET(View view){        String uname=et_main_uname.getText().toString();        String upass=et_main_upass.getText().toString();        //192.168.43.164   进入DOS密令 输入ipconfig 获取 --》 IPv4 地址（192.168.43.164）        //G160628_ServerForAndroid/login.do  Java jsp登录页面        String path="http://192.168.43.164:8080/G160628_ServerForAndroid/login.do";        new MyTask().execute(uname,upass,path);    }    class MyTask extends AsyncTask{        @Override        protected Object doInBackground(Object[] params) {            String uname=params[0].toString();            String upass=params[1].toString();            String path=params[2].toString();            Log.i("test",path);            try {                //GET方式必须写                URL url=new URL(path+"?uname="+uname+"&upass="+upass);                //打开连接                HttpURLConnection connection= (HttpURLConnection) url.openConnection();                  //请求方式                connection.setRequestMethod("GET");                connection.setConnectTimeout(5000);                //获取结果码 注：结果码必须写在  请求方式的后面                int i=connection.getResponseCode();                Log.i("test",""+i);                if(i==200){                    //与Eclipse进行数据交互                    InputStream is=connection.getInputStream();                    BufferedReader br=new BufferedReader(new InputStreamReader(is));                    //从Eclipse进行数据交互的值                    String s=br.readLine();                    return s;                }            } catch (MalformedURLException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            //打印Eclipse进行数据交互的值            String s= (String) o;            Toast.makeText(MainActivity.this, s, Toast.LENGTH_SHORT).show();        }    }}

POST 方式：

package com.example.g160628_android_32_commit_data;import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class Post extends AppCompatActivity {    private EditText et_post_uname;    private EditText et_post_upass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_post);        //账号        et_post_uname = (EditText) findViewById(R.id.et_Post_uname);        //密码        et_post_upass = (EditText) findViewById(R.id.et_Post_upass);    }     //按钮点击方法    public void loginPost(View view){           String uname=et_post_uname.getText().toString();           String upass=et_post_upass.getText().toString();        //192.168.43.164   进入DOS密令 输入ipconfig 获取 --》 IPv4 地址（192.168.43.164）        //G160628_ServerForAndroid/login.do  Java jsp登录页面        String path="http://192.168.43.164:8080/G160628_ServerForAndroid/login.do";         new MyTask().execute(uname,upass,path);    }    class MyTask extends AsyncTask{        @Override        protected Object doInBackground(Object[] params) {            String uname=params[0].toString();            String upass=params[1].toString();            String path=params[2].toString();            try {                URL url=new URL(path);                HttpURLConnection connection= (HttpURLConnection) url.openConnection();                connection.setRequestMethod("POST");                connection.setConnectTimeout(5000);                                String s="uname="+uname+"&upass="+upass;                //添加请求头                // 键是固定的写法                connection.setRequestProperty("Content-Length",s.length()+"");                //键和值是固定的写法                connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");                            connection.setDoOutput(true);//允许对外输出数据                //传值给Eclipse                OutputStream os=connection.getOutputStream();                os.write(s.getBytes());                int code=connection.getResponseCode();                if(code==200){                    //与                    InputStream is=connection.getInputStream();                    BufferedReader br=new BufferedReader(new InputStreamReader(is));                    String str=br.readLine();                    return str;               }            } catch (MalformedURLException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            String str= (String) o;            Toast.makeText(Post.this,str, Toast.LENGTH_SHORT).show();        }    }}

使用第三方（android-async-http-1.4.4.jar）

切换到project找到项目下的libs文件夹下导入jar包右键 Add As Libaray..(倒数第二个)

注：在build.gradle 里添加

useLibrary 'org.apache.http.legacy'（建议写在android { }里的第一行）

package com.example.g160628_android_32_commit_data;import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.EditText;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.RequestParams;import com.loopj.android.http.TextHttpResponseHandler;import org.apache.http.Header;public class HttpClient extends AppCompatActivity {    private EditText et_httpClient_uname;    private EditText et_httpClient_upass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_http_client);        et_httpClient_uname = (EditText) findViewById(R.id.et_HttpClient_uname);        et_httpClient_upass = (EditText) findViewById(R.id.et_HttpClient_upass);    }    public void loginHttpClient(View view){        String uname=et_httpClient_uname.getText().toString();        String upass=et_httpClient_upass.getText().toString();        String path="http://192.168.43.164:8080/G160628_ServerForAndroid/login.do";        //android-async-http-1.4.4.jar 里的类        AsyncHttpClient ahc=new AsyncHttpClient();        //请求参数的方法        RequestParams params=new RequestParams();        params.put("uname",uname);        params.put("upass",upass);        ahc.post(this,path,params,new TextHttpResponseHandler(){            @Override            public void onFailure(int statusCode, Header[] headers, String responseBody, Throwable error) {                super.onFailure(statusCode, headers, responseBody, error);            }            @Override            public void onSuccess(int statusCode, Header[] headers, String responseBody) {                super.onSuccess(statusCode, headers, responseBody);                //与Eclipse进行数据交互的值 ——》 responseBody                Toast.makeText(HttpClient.this, responseBody, Toast.LENGTH_SHORT).show();            }        });    }}

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