Go语言视频零基础入门到精通

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三种获取网页数据的代码，是自己在用的时候随手整理出来的。此处仅贴出函数段，不贴出import了，用的时候可以用eclipse自动import一下就行了。函数的详细用途描述请看代码中注释。调用的时候请对应函数需要的参数。

        第一种

java代码： /**获取参数(ArrayList<NameValuePair> nameValuePairs,String url)后post给远程服务器

* 将获得的返回结果(String)返回给调用者

* 本函数适用于查询数量较少的时候

* Chen.Zhidong

* 2011-02-15*/

public String posturl(ArrayList<NameValuePair> nameValuePairs,String url){

String result = "";

String tmp= "";

InputStream is = null;

try{

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost(url);

httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

HttpResponse response = httpclient.execute(httppost);

HttpEntity entity = response.getEntity();

is = entity.getContent();

}catch(Exception e){

return "Fail to establish http connection!";

}

try{

BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));

StringBuilder sb = new StringBuilder();

String line = null;



while ((line = reader.readLine()) != null) {

sb.append(line + "\n");

}

is.close();

tmp=sb.toString();

}catch(Exception e){

return "Fail to convert net stream!";

}

try{

JSONArray jArray = new JSONArray(tmp);





for(int i=0;i<jArray.length();i++){

JSONObject json_data = jArray.getJSONObject(i);

Iterator<?> keys=json_data.keys();



while(keys.hasNext()){

result += json_data.getString(keys.next().toString());

}

}

}catch(JSONException e){

return "The URL you post is wrong!";

}

return result;

}

第二种

java代码：
/**获取参数指定的网页代码，将其返回给调用者，由调用者对其解析

* 返回String

* Chen.Zhidong

* 2011-02-15*/

public String posturl(String url){

InputStream is = null;

String result = "";

try{

HttpClient httpclient = new DefaultHttpClient();

HttpPost httppost = new HttpPost(url);

HttpResponse response = httpclient.execute(httppost);

HttpEntity entity = response.getEntity();

is = entity.getContent();

}catch(Exception e){

return "Fail to establish http connection!"+e.toString();

}



try{

BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));

StringBuilder sb = new StringBuilder();

String line = null;

while ((line = reader.readLine()) != null) {

sb.append(line + "\n");

}



is.close();

result=sb.toString();

}catch(Exception e){

return "Fail to convert net stream!";

}

return result;

}
  第三种

java代码：
/**获取指定地址的网页数据

* 返回数据流

* Chen.Zhidong

* 2011-02-18*/



public InputStream streampost(String remote_addr){

URL infoUrl = null;

InputStream inStream = null;

try {

infoUrl = new URL(remote_addr);

URLConnection connection = infoUrl.openConnection();

HttpURLConnection httpConnection = (HttpURLConnection)connection;

int responseCode = httpConnection.getResponseCode();

if(responseCode == HttpURLConnection.HTTP_OK){

inStream = httpConnection.getInputStream();

}

} catch (MalformedURLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return inStream;

}

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