android中使用get、post和HttpClient方式与服务器交互

Myth丶恋晨 2022-09-18 04:41 5阅读 0赞

一：get方式请求服务器

public String byGet()\{  
  try \{  
   URL url=new URL( [http://www.apkbus.com/index.jsp?id=6&username=blog][http_www.apkbus.com_index.jsp_id_6_username_blog]);  
   HttpURLConnection conn= (HttpURLConnection) url.openConnection();  
   conn.setRequestMethod("GET");  
   conn.setReadTimeout(5000);  
   conn.setConnectTimeout(5000);  
   conn.setRequestProperty(field, newValue);  
     
   int code=conn.getResponseCode();  
   if (code==200) \{  
    //请求成功  
    InputStream in=conn.getInputStream();  
    BufferedReader br=new BufferedReader(new InputStreamReader(in, "UTF-8"));  
    StringBuffer buffer=null;  
    while(br.readLine()!=null)\{  
     buffer.append(br.readLine().trim());  
    \}  
    return buffer.toString();  
   \} else \{  
                   return "请求失败";  
   \}  
  \} catch (Exception e) \{  
   // TODO Auto-generated catch block  
   e.printStackTrace();  
  \}

return null;  
 \}

二：post方式提交数据

public String byPost()\{  
  try \{  
   URL url=new URL(" [http://www.apkbus.com/][http_www.apkbus.com]");  
   HttpURLConnection conn= (HttpURLConnection) url.openConnection();  
   conn.setRequestMethod("POST");  
   conn.setReadTimeout(5000);  
   conn.setConnectTimeout(5000);  
   String data="username=4&id=4";  
   conn.setRequestProperty("Content-Type", "");//指定请求类型  
   conn.setRequestProperty("Content-Length", data.length()+"");//指定数据的大小  
   conn.setDoOutput(true);//指定允许往服务器些数据  
   OutputStream os=conn.getOutputStream();  
   os.write(data.getBytes());//写数据  
     
   int code=conn.getResponseCode();  
   if (code==200) \{  
    //请求成功  
    InputStream in=conn.getInputStream();  
    BufferedReader br=new BufferedReader(new InputStreamReader(in, "UTF-8"));  
    StringBuffer buffer=null;  
    while(br.readLine()!=null)\{  
     buffer.append(br.readLine().trim());  
    \}  
    return buffer.toString();  
   \} else \{  
                   return "请求失败";  
   \}  
     
  \} catch (Exception e) \{  
   // TODO Auto-generated catch block  
   e.printStackTrace();  
  \}  
  return null;  
 \}

三：使用HttpClient开源框架的GET方法

public String byHttpClientGET()\{  
  try \{  
   //1.打开一个浏览器  
   HttpClient client=new DefaultHttpClient();  
   //2.输入地址  
   //2.get方式输入地址  
   HttpGet httpget=new HttpGet(" [http://www.apkbus.com/index.jsp?id=3][http_www.apkbus.com_index.jsp_id_3]");  
   //3.回车  
   HttpResponse response=client.execute(httpget);  
   int code=response.getStatusLine().getStatusCode();  
     
   if (code==200) \{  
    //请求成功  
    HttpEntity entity=response.getEntity();  
    InputStream in= entity.getContent();  
    BufferedReader br=new BufferedReader(new InputStreamReader(in, "UTF-8"));  
    StringBuffer buffer=null;  
    while(br.readLine()!=null)\{  
     buffer.append(br.readLine().trim());  
    \}  
    return buffer.toString();  
   \} else \{  
                   return "请求失败";  
   \}  
     
  \} catch (Exception e) \{  
   // TODO Auto-generated catch block  
   e.printStackTrace();  
  \}  
  return null;  
 \}

四：使用HttpClient开源框架的POST方法

public String byHttpClientPOST()\{  
  try \{  
   //1.打开一个浏览器  
   HttpClient client=new DefaultHttpClient();  
   //2.输入地址  
   //2.get方式输入地址  
   HttpPost httpPOST=new HttpPost(" [http://www.apkbus.com][http_www.apkbus.com]");  
   //3.指定要提交的数据实体  
   ArrayList parameters=new ArrayList<NameValuePair>();  
   parameters.add(new BasicNameValuePair("username", "zhangsan"));  
   httpPOST.setEntity(new UrlEncodedFormEntity(parameters, "UTF-8"));  
   //4.敲回车  
   HttpResponse response=client.execute(httpPOST);  
   int code=response.getStatusLine().getStatusCode();  
     
   if (code==200) \{  
    //请求成功  
    HttpEntity entity=response.getEntity();  
    InputStream in= entity.getContent();  
    BufferedReader br=new BufferedReader(new InputStreamReader(in, "UTF-8"));  
    StringBuffer buffer=null;  
    while(br.readLine()!=null)\{  
     buffer.append(br.readLine().trim());  
    \}  
    return buffer.toString();  
   \} else \{  
                   return "请求失败";  
   \}  
     
  \} catch (Exception e) \{  
   // TODO Auto-generated catch block  
   e.printStackTrace();  
  \}  
  return null;  
 \}

[http_www.apkbus.com_index.jsp_id_6_username_blog]: http://www.apkbus.com/index.jsp?id=6&username=blog
[http_www.apkbus.com]: http://www.apkbus.com/
[http_www.apkbus.com_index.jsp_id_3]: http://www.apkbus.com/index.jsp?id=3