ANDROID_MARS学习笔记_S04_004_用HTTPCLENT发带参数的get和post请求

一、代码

1.xml
(1)activity_main.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.http2.MainActivity" >

     <EditText
         android:id="@+id/nameText"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="小明"
         />
     <EditText
         android:id="@+id/ageText"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="123"
         />
     <Button
         android:id="@+id/getBtnId"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Get请求"
         android:onClick="getHttp"/>
     <Button
         android:id="@+id/postBtnId"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Post请求"
         android:onClick="postHttp"/>

 </LinearLayout>

(2)AndroidManifest.xml

增加

<uses-permission android:name="android.permission.INTERNET"/>

2.java
(1)HandleRequest.java  服务器端Servlet

 package 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 HandleRequest extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         System.out.println("doGet");
         request.setAttribute("method", "get访求访问");
         request.setAttribute("name", request.getParameter("name"));
         request.setAttribute("age", request.getParameter("age"));
         response.getWriter().print("get访求访问--->"+request.getParameter("name")+"--->"+request.getParameter("age"));
         //request.getRequestDispatcher("index.jsp").forward(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         System.out.println("doPost");
         request.setAttribute("method", "post访求访问");
         request.setAttribute("name", request.getParameter("name"));
         request.setAttribute("age", request.getParameter("age"));
         response.getWriter().print("post访求访问--->"+request.getParameter("name")+"--->"+request.getParameter("age"));
         //request.getRequestDispatcher("index.jsp").forward(request, response);
     }

 }

(2)MainActivity.java

 package com.http2;

 import java.util.ArrayList;
 import java.util.List;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.EditText;

 public class MainActivity extends Activity {

     //private Button getBtn,postBtn = null;
     private EditText nameView,ageView = null;
     private String baseUrl = "http://192.168.1.104:8080/AndroidServerTest/HandleRequest";
     private String name,age = null;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         nameView = (EditText) findViewById(R.id.nameText);
         ageView = (EditText) findViewById(R.id.ageText);
         name = nameView.getText().toString();
         age = ageView.getText().toString();
     }

     public void getHttp(View view) {
         String url = baseUrl + "?name=" + name + "&age=" + age;
         HttpAsyncTask httpAsyncTask = new HttpAsyncTask(url, "get");
         httpAsyncTask.execute("");
     }
     public void postHttp(View view) {
         //post的参数会放在httpEntity里，所以不用拼url
         List<String> parmas = new ArrayList<String>();
         parmas.add(name);
         parmas.add(age);
         HttpAsyncTask httpAsyncTask = new HttpAsyncTask(baseUrl, "post", parmas);
         httpAsyncTask.execute("");
     }

 }

(3)HttpAsyncTask.java

 package com.http2;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.UnsupportedEncodingException;
 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.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.client.methods.HttpRequestBase;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.message.BasicNameValuePair;

 import android.os.AsyncTask;

 public class HttpAsyncTask extends AsyncTask<String, Void, Void> {

     private String url;
     private String method;
     private List<String> params;

     public HttpAsyncTask(String url, String method) {
         super();
         this.url = url;
         this.method = method;
     }
     public HttpAsyncTask(String url, String method, List<String> params) {
         super();
         this.url = url;
         this.method = method;
         this.params = params;
     }

     @Override
     protected Void doInBackground(String... params) {
         if("get".equals(method))
             sendGetHttpRequest(url);
         else if("post".equals(method))
             sendPostRequest(url, this.params);
         return null;
     }

     private void sendPostRequest(String url,List<String> params) {
         System.out.println("sendPostRequest---->");
         NameValuePair nameValuePair1 = new BasicNameValuePair("name", this.params.get(0));
         NameValuePair nameValuePair2 = new BasicNameValuePair("age", this.params.get(1));
         List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
         nameValuePairs.add(nameValuePair1);
         nameValuePairs.add(nameValuePair2);
         InputStream inputStream = null;
         try {
             //请求体
             HttpEntity httpEntity = new UrlEncodedFormEntity(nameValuePairs);
             //url不用带参数-->"?a=1&b=2"
             HttpPost httpPost = new HttpPost(url);
             httpPost.setEntity(httpEntity);
             HttpClient httpClient = new DefaultHttpClient();
             HttpResponse httpResponse = httpClient.execute(httpPost);
             HttpEntity respHttpEntity = httpResponse.getEntity();
             inputStream = respHttpEntity.getContent();
             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
             String line = null;
             StringBuilder sb = new StringBuilder();
             while ((line = reader.readLine()) != null) {
                 sb.append(line);
             }
             System.out.println(sb);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     private void sendGetHttpRequest(String url) {
         System.out.println("sendGetHttpRequest---->");
         //生成一个请求对象
         HttpGet httpGet = new HttpGet(url);
         //生成一个Http客户端对象
         HttpClient httpClient = new DefaultHttpClient();
         InputStream inputStream = null;
         //使用Http客户端发送请求对象
         try {
             HttpResponse httpResponse = httpClient.execute(httpGet);
             HttpEntity httpEntity = httpResponse.getEntity();
             inputStream = httpEntity.getContent();
             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
             String line = null;
             StringBuilder sb = new StringBuilder();
             while ((line = reader.readLine()) != null) {
                 sb.append(line);
             }
             System.out.println(sb);
         } catch (ClientProtocolException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         } finally {
             try {
                 inputStream.close();
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }

 }