package net.bwie.network.activity; import android.content.Context; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import android.widget.Button; import com.google.gson.Gson; import net.bwie.network.R; import net.bwie.network.bean.Person; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; /** * 当前案例: * 上传姓名和年龄,返回JSON字符串 */ public class PostActivity extends AppCompatActivity implements View.OnClickListener { protected Button mPostBtn; public static void startActivity(Context context) { context.startActivity(new Intent(context, PostActivity.class)); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); super.setContentView(R.layout.activity_post); initView(); } @Override public void onClick(View view) { if (view.getId() == R.id.post_btn) { doPost(); } } // 使用异步任务执行POST请求 private void doPost() { String url = "http://172.21.66.7:8080/postdemo"; PostTask task = new PostTask(); task.execute(url); } private void initView() { mPostBtn = (Button) findViewById(R.id.post_btn); mPostBtn.setOnClickListener(PostActivity.this); } private class PostTask extends AsyncTask<String, Void, Person> { @Override protected Person doInBackground(String... params) { String requestUrl = params[0]; // try { URL url = new URL(requestUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); // 设置POST请求 connection.setRequestMethod("POST"); // 设置可向服务器输出 connection.setDoOutput(true); connection.setDoInput(true); // 打开连接 connection.connect(); // 打开连接后,向服务端写要提交的参数 // 参数格式:“name=asdasdas&age=123123” StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("name=") .append("wuyanzu")// 拼接自己传入的姓名 .append("&") .append("age=") .append("123");// 拼接自己传入的年龄 // 获取向服务器写数据的输出流 connection.getOutputStream() .write(stringBuilder.toString().getBytes()); // 提交数据后,获取来自服务器的json数据 if (connection.getResponseCode() == 200) { BufferedReader br = null; br = new BufferedReader(new InputStreamReader(connection.getInputStream())); String json = ""; String line = ""; while ((line = br.readLine()) != null) { json += line.trim(); } // 解析 Gson gson = new Gson(); Person person = gson.fromJson(json, Person.class); return person; } } catch (Exception e) { e.printStackTrace(); Log.d("1507", e.getMessage()); } return null; } @Override protected void onPostExecute(Person person) { super.onPostExecute(person); Log.d("1507", "name:" + person.getName() + ", age: " + person.getAge()); } } }
package net.bwie.network.bean; public class Person { private String name = ""; private String age = ""; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } }<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="net.bwie.network.activity.PostActivity"> <Button android:id="@+id/post_btn" android:text="post请求" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </android.support.constraint.ConstraintLayout>
<uses-permission android:name="android.permission.INTERNET"/>