Android入门：发送HTTP的GET和POST请求

服务器端代码

[java]
package org.xiazdong.servlet;

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

@WebServlet("/PrintServlet")
public class PrintServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String name = new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8");
        String age = new String(request.getParameter("age").getBytes("ISO-8859-1"),"UTF-8");
        System.out.println("姓名:"+name+"\n年龄："+age);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        System.out.println("姓名:"+request.getParameter("name")+"\n年龄："+request.getParameter("age"));
    }
}

Android端代码

[java]
package org.xiazdong.network.submit;

import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

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

public class MainActivity extends Activity {
    private EditText name, age;
    private Button getbutton, postbutton;
    private OnClickListener listener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            try{
                if (getbutton == v) {
                    /*
                     * 因为是GET请求，所以需要将请求参数添加到URL后，并且还需要进行URL编码
                     * URL = http://192.168.0.103:8080/Server/PrintServlet?name=%E6%88%91&age=20
                     * 此处需要进行URL编码因为浏览器提交时自动进行URL编码
                     * */
                    StringBuilder buf = new StringBuilder("http://192.168.0.103:8080/Server/PrintServlet");
                    buf.append("?");
                    buf.append("name="+URLEncoder.encode(name.getText().toString(),"UTF-8")+"&");
                    buf.append("age="+URLEncoder.encode(age.getText().toString(),"UTF-8"));
                    URL url = new URL(buf.toString());
                    HttpURLConnection conn = (HttpURLConnection)url.openConnection();
                    conn.setRequestMethod("GET");
                    if(conn.getResponseCode()==200){
                        Toast.makeText(MainActivity.this, "GET提交成功", Toast.LENGTH_SHORT).show();
                    }
                    else Toast.makeText(MainActivity.this, "GET提交失败", Toast.LENGTH_SHORT).show();
                }
                if (postbutton == v) {
                    /*
                     * 如果是POST请求，则请求参数放在请求体中，
                     * name=%E6%88%91&age=12
                     *
                     * */
                    StringBuilder buf = new StringBuilder();
                    buf.append("name="+URLEncoder.encode(name.getText().toString(),"UTF-8")+"&");
                    buf.append("age="+URLEncoder.encode(age.getText().toString(),"UTF-8"));
                    byte[]data = buf.toString().getBytes("UTF-8");
                    URL url = new URL("http://192.168.0.103:8080/Server/PrintServlet");

补充：移动开发 , Android ,