本文总结了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。
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001 //第一种
002 /**获取参数(ArrayList<NameValuePair> nameValuePairs,String url)后post给远程服务器
003 * 将获得的返回结果(String)返回给调用者
004 * 本函数适用于查询数量较少的时候
005 * Chen.Zhidong
006 * 2011-02-15*/
007 public String posturl(ArrayList<NameValuePair> nameValuePairs,String url){
008 String result = "";
009 String tmp= "";
010 InputStream is = null;
011 try{
012 HttpClient httpclient = new DefaultHttpClient();
013 HttpPost httppost = new HttpPost(url);
014 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
015 HttpResponse response = httpclient.execute(httppost);
016 HttpEntity entity = response.getEntity();
017 is = entity.getContent();
018 }catch(Exception e){
019 return "Fail to establish http connection!";
020 }
021
022 try{
023 BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
024 StringBuilder sb = new StringBuilder();
025 String line = null;
026 while ((line = reader.readLine()) != null) {
027 sb.append(line + "\n");
028 }
029 is.close();
030
031 tmp=sb.toString();
032 }catch(Exception e){
033 return "Fail to convert net stream!";
034 }
035
036 try{
037 JSONArray jArray = new JSONArray(tmp);
038 for(int i=0;i<jArray.length();i++){
039 JSONObject json_data = jArray.getJSONObject(i);
040 Iterator<?> keys=json_data.keys();
041 while(keys.hasNext()){
042 result += json_data.getString(keys.next().toString());
043 }
044 }
045 }catch(JSONException e){
046 return "The URL you post is wrong!";
047 }
048
049 return result;
050 }
051
052 //第二种
053 /**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
054 * 返回String
055 * Chen.Zhidong
056 * 2011-02-15*/
057 public String posturl(String url){
058 InputStream is = null;
059 String result = "";
060
061 try{
062 HttpClient httpclient = new DefaultHttpClient();
063 HttpPost httppost = new HttpPost(url);
064 HttpResponse response = httpclient.execute(httppost);
065 HttpEntity entity = response.getEntity();
066 is = entity.getContent();
067 }catch(Exception e){
068 return "Fail to establish http connection!"+e.toString();
069 }
070
071 try{
072 BufferedReader reader = new BufferedReader(new InputStreamReader(is,"utf-8"));
073 StringBuilder sb = new StringBuilder();
074 String line = null;
075 while ((line = reader.readLine()) != null) {
076 sb.append(line + "\n");
077 }
078 is.close();
079
080 result=sb.toString();
081 }catch(Exception e){
082 return "Fail to convert net stream!";
083 }
084
085 return result;
086 }
087
088 //第三种
089 /**获取指定地址的网页数据
090 * 返回数据流
091 * Chen.Zhidong
092 * 2011-02-18*/
093 public InputStream streampost(String remote_addr){
094 URL infoUrl = null;
095 InputStream inStream = null;
096 try {
097 infoUrl = new URL(remote_addr);
098 URLConnection connection = infoUrl.openConnection();
099 HttpURLConnection httpConnection = (HttpURLConnection)connection;
100 int responseCode = httpConnection.getResponseCode();
101 if(responseCode == HttpURLConnection.HTTP_OK){
102 inStream = httpConnection.getInputStream();
103 }
104 } catch (MalformedURLException e) {
105 // TODO Auto-generated catch block
106 e.printStackTrace();
107 } catch (IOException e) {
108 // TODO Auto-generated catch block
109 e.printStackTrace();
110 }
111 return inStream;
112 }
