使用HttpURLConnection实现在android客户端和服务器之间传递对象

标签：对象   android   httpurlconnection   object   

一般情况下，客户端和服务端的数据交互都是使用json和XML，相比于XML，json更加轻量级，并且省流量，但是，无论我们用json还是用xml，都需要我们先将数据封装成json字符串或者是一个xml字符串然后传输，那么有没有可能我们直接在android客户端上传递一个Object给服务器端呢？答案是肯定的。

我们看一个简单的App注册页面，如下图：

当我们点击注册按钮的时候，将用户的注册信息通过一个Object对象传递到服务器，好，下来我们看看怎么样来传递对象：

首先我们要把用户的注册信息封装成一个JavaBean，为了这个JavaBean可以在网络上传输，我们要实现Serializable接口：

public class Person implements Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	private String password;
	private String username;
	private String nickname;

	
	
	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getNickname() {
		return nickname;
	}

	public void setNickname(String nickname) {
		this.nickname = nickname;
	}


	public Person(String password, String username, String nickname) {
		super();
		this.password = password;
		this.username = username;
		this.nickname = nickname;
	}

	public Person() {
	}

}

TransObject to = new TransObject();
			to.execute(new Person(passwd.getText().toString(), name.getText()
					.toString(), nickname.getText().toString()));

	class TransObject extends AsyncTask<Person, Void, String> {

		@Override
		protected String doInBackground(Person... params) {
			StringBuffer sb = new StringBuffer();
			Person p = params[0];
			BufferedReader reader = null;
			HttpURLConnection con = null;
			ObjectOutputStream oos = null;
			try {
				URL url = new URL("http://192.168.1.106/android/to");
				con = (HttpURLConnection) url.openConnection();
				// 设置允许输出，默认为false
				con.setDoOutput(true);
				con.setConnectTimeout(5 * 1000);
				con.setReadTimeout(10 * 1000);
				// 请求方式为POST请求
				con.setRequestMethod("POST");
				oos = new ObjectOutputStream(con.getOutputStream());
				// 向服务端写数据
				oos.writeObject(p);
				// 获得服务端的返回数据
				InputStreamReader read = new InputStreamReader(
						con.getInputStream());
				reader = new BufferedReader(read);
				String line = "";
				while ((line = reader.readLine()) != null) {
					sb.append(line);
				}
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				if (reader != null) {
					try {
						reader.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				if (oos != null) {
					try {
						oos.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
				if (con != null) {
					con.disconnect();
				}
			}
			return sb.toString();
		}

		@Override
		protected void onPostExecute(String result) {
			super.onPostExecute(result);
			if (result != null && "OK".equals(result)) {
				Toast.makeText(MainActivity.this, "注册成功", Toast.LENGTH_SHORT)
						.show();
			}
		}
	}

@WebServlet("/to")
public class TransObject extends HttpServlet {
	private static final long serialVersionUID = 1L;

	public TransObject() {
	}

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		System.out.println("doGet");
	}

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		System.out.println("doPost");
		ObjectInputStream ois = new ObjectInputStream(request.getInputStream());
		try {
			Person p = (Person) ois.readObject();
			System.out.println("密码是：" + p.getPassword());
			System.out.println("用户名是：" + p.getUsername());
			System.out.println("昵称是：" + p.getNickname());
			PrintWriter out = response.getWriter();
			out.print("OK");
			out.flush();
			out.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} finally {
			if (ois != null) {
				ois.close();
			}
		}
	}
}

好了，经过上面几个步骤我们就可以给将android客户端的一个Object传递到服务器上了，就这么简单，省去了将对象转为json或者XML的麻烦。

android端Demo下载https://github.com/lenve/TransObj

服务端Demo下载http://download.csdn.net/detail/u012702547/9263967

使用HttpURLConnection实现在android客户端和服务器之间传递对象

标签：对象   android   httpurlconnection   object   

原文地址：http://blog.csdn.net/u012702547/article/details/49798709