Android GET,POST向服务器端发送数据(发送)

//目录结构

//strings.xml字符常量文件

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="title">通过Get和Post两种方式分别提交数据到服务器</string>
    <string name="app_name">GetAndPostRequest</string>
    <string name="book_name">书本名称</string>
    <string name="book_price">书本价格</string>
    <string name="success">提交成功</string>
    <string name="error">提交失败</string>
    <string name="get_request">Get请求提交</string>
    <string name="post_request">Post请求提交</string>
</resources>

//main.xml 布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/title" />
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/book_name"
        />
    <EditText
        android:id="@+id/book_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/book_price"
        />
    <EditText
        android:id="@+id/book_price"
        android:numeric="integer"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        >
        <Button
            android:id="@+id/get_reqeust"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/get_request"
            />
        <Button
            android:id="@+id/post_reqeust"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/post_request"
            />
    </LinearLayout>

</LinearLayout>

//RequestService.java 通过GET 和 Post请求的类

package sn.len.request;

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

public class RequestService
{
    //get请求，有文件长度大小限制
    public static boolean getRequest(String urlPath) throws Exception
    {
        URL url=new URL(urlPath);
        HttpURLConnection con=(HttpURLConnection)url.openConnection();
        con.setRequestMethod("GET");
        con.setReadTimeout(5*1000);
        if(con.getResponseCode()==200)
        {
            return true;
        }
        return false;
    }
    //post请求，无文件长度大小限制
    public static boolean postRequest(String urlPath,Map<String,String> map) throws Exception
    {
        StringBuilder builder=new StringBuilder(); //拼接字符
        //拿出键值
        if(map!=null && !map.isEmpty())
        {
            for(Map.Entry<String, String> param:map.entrySet())
            {
                builder.append(param.getKey()).append('=').append(URLEncoder.encode(param.getValue(), "utf-8")).append('&');
            }
            builder.deleteCharAt(builder.length()-1);
        }
        //下面的Content-Length: 是这个URL的二进制数据长度
        byte b[]=builder.toString().getBytes();
        URL url=new URL(urlPath);
        HttpURLConnection con=(HttpURLConnection)url.openConnection();
        con.setRequestMethod("POST");
        con.setReadTimeout(5*1000);
        con.setDoOutput(true);//打开向外输出
        con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");//内容类型
        con.setRequestProperty("Content-Length",String.valueOf(b.length));//长度
        OutputStream outStream=con.getOutputStream();
        outStream.write(b);//写入数据
        outStream.flush();//刷新内存
        outStream.close();
        //状态码是不成功
        if(con.getResponseCode()==200)
        {
            return true;
        }
        return false;

    }
}