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从输入流中获取数据并以字节数组返回
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import?java.io.ByteArrayOutputStream;?
? import?java.io.InputStream;? public?class?StreamTool?{?
? ?
?
?
?
?
?
? public?static?byte[]?readInputStream(InputStream?inputStream)?throws?Exception?{?
? byte[]?buffer?=?new?byte[1024];????
? int?len?=?-1;?
ByteArrayOutputStream?outSteam?=?new?ByteArrayOutputStream();? ?? while(?(len?=?inputStream.read(buffer))?!=?-1?){?
outSteam.write(buffer,?0,?len);?
?}?
outSteam.close();?
inputStream.close();?
?? return?outSteam.toByteArray();?
??}?
??}???通過Android客戶端上傳數據到服務器：可以上傳簡單的表單，也可以方便的上傳帶有附件的文件，此類遠遠比Android自身的HttpClient更高效、更易于使用?import?java.io.DataOutputStream;??import?java.io.InputStream;??import?java.net.HttpURLConnection;??import?java.net.URL;??import?java.net.URLEncoder;??import?java.util.ArrayList;??import?java.util.List;??import?java.util.Map;??import?org.apache.http.HttpResponse;??import?org.apache.http.NameValuePair;??import?org.apache.http.client.HttpClient;??import?org.apache.http.client.entity.UrlEncodedFormEntity;??import?org.apache.http.client.methods.HttpPost;??import?org.apache.http.impl.client.DefaultHttpClient;??import?org.apache.http.message.BasicNameValuePair;??public?class?HttpRequester?{??????????????????????????public?static?String?post(String?actionUrl,?Map<String,?String>?params,?FormFile[]?files)?{??try?{??String?BOUNDARY?=?"---------7d4a6d158c9";???String?MULTIPART_FORM_DATA?=?"multipart/form-data";??URL?url?=?new?URL(actionUrl);??HttpURLConnection?conn?=?(HttpURLConnection)?url.openConnection();??conn.setConnectTimeout(5*?1000);??conn.setDoInput(true);??conn.setDoOutput(true);??conn.setUseCaches(false);??conn.setRequestMethod("POST");??conn.setRequestProperty("Connection",?"Keep-Alive");??conn.setRequestProperty("Charset",?"UTF-8");??conn.setRequestProperty("Content-Type",?MULTIPART_FORM_DATA?+?";??boundary="?+?BOUNDARY);??StringBuilder?sb?=?new?StringBuilder();??for?(Map.Entry<String,?String>?entry?:?params.entrySet())?{??sb.append("--");??sb.append(BOUNDARY);??sb.append("\r\n");??sb.append("Content-Disposition:?form-data;?name=\""+?entry.getKey()?+?"\"\r\n\r\n");??sb.append(entry.getValue());??sb.append("\r\n");??}??DataOutputStream?outStream?=?new?DataOutputStream(conn.getOutputStream());??outStream.write(sb.toString().getBytes());??for(FormFile?file?:?files){??StringBuilder?split?=?new?StringBuilder();??split.append("--");??split.append(BOUNDARY);??split.append("\r\n");??split.append("Content-Disposition:?form-data;name=\""+??file.getFormname()+"\";filename=\""+?file.getFilname()?+?"\"\r\n");??split.append("Content-Type:?"+?file.getContentType()+"\r\n\r\n");??outStream.write(split.toString().getBytes());??if(file.getInStream()!=null){??byte[]?buffer?=?new?byte[1024];??int?len?=?0;??while((len?=?file.getInStream().read(buffer))!=-1){??outStream.write(buffer,?0,?len);??}??file.getInStream().close();??}else{??outStream.write(file.getData(),?0,?file.getData().length);??}??outStream.write("\r\n".getBytes());??}??byte[]?end_data?=?("--"?+?BOUNDARY?+?"--\r\n").getBytes();??outStream.write(end_data);??outStream.flush();??int?cah?=?conn.getResponseCode();??if?(cah?!=?200)?throw?new?RuntimeException("請求url失敗");??InputStream?is?=?conn.getInputStream();??int?ch;??StringBuilder?b?=?new?StringBuilder();??while(?(ch?=?is.read())?!=?-1?){??b.append((char)ch);??}??outStream.close();??conn.disconnect();??return?b.toString();??}?catch?(Exception?e)?{??throw?new?RuntimeException(e);??}??}??????????????public?static?String?post(String?actionUrl,?Map<String,?String>?params,?FormFile?file)?{?return?post(actionUrl,?params,?new?FormFile[]{file});?}??public?static?byte[]?postFromHttpClient(String?path,?Map<String,?String>?params,?String?encode)?throws?Exception{??List<NameValuePair>?formparams?=?new?ArrayList<NameValuePair>();??for(Map.Entry<String,?String>?entry?:?params.entrySet()){??formparams.add(new?BasicNameValuePair(entry.getKey(),?entry.getValue()));??}??UrlEncodedFormEntity?entity?=?new?UrlEncodedFormEntity(formparams,?"UTF-8");?HttpPost?httppost?=?new?HttpPost(path);??httppost.setEntity(entity);??HttpClient?httpclient?=?new?DefaultHttpClient();??HttpResponse?response?=?httpclient.execute(httppost);??return?StreamTool.readInputStream(response.getEntity().getContent());??}??????????????public?static?byte[]?post(String?path,?Map<String,?String>?params,?String?encode)?throws?Exception{????StringBuilder?parambuilder?=?new?StringBuilder("");??if(params!=null?&&?!params.isEmpty()){??for(Map.Entry<String,?String>?entry?:?params.entrySet()){??parambuilder.append(entry.getKey()).append("=")??.append(URLEncoder.encode(entry.getValue(),?encode)).append("&");??}??parambuilder.deleteCharAt(parambuilder.length()-1);??}??byte[]?data?=?parambuilder.toString().getBytes();??URL?url?=?new?URL(path);??HttpURLConnection?conn?=?(HttpURLConnection)url.openConnection();??conn.setDoOutput(true);??conn.setUseCaches(false);??conn.setConnectTimeout(5?*?1000);??conn.setRequestMethod("POST");????conn.setRequestProperty("Accept",?"p_w_picpath/gif,?p_w_picpath/jpeg,?p_w_picpath/pjpeg,?p_w_picpath/pjpeg,?application/x-shockwave-flash,?application/xaml+xml,?application/vnd.ms-xpsdocument,?application/x-ms-xbap,?application/x-ms-application,?application/vnd.ms-excel,?application/vnd.ms-powerpoint,?application/msword,?*/*");??conn.setRequestProperty("Accept-Language",?"zh-CN");??conn.setRequestProperty("User-Agent",?"Mozilla/4.0?(compatible;?MSIE?8.0;?Windows?NT?5.2;?Trident/4.0;?.NET?CLR?1.1.4322;?.NET?CLR?2.0.50727;?.NET?CLR?3.0.04506.30;?.NET?CLR?3.0.4506.2152;?.NET?CLR?3.5.30729)");??conn.setRequestProperty("Content-Type",?"application/x-www-form-urlencoded");??conn.setRequestProperty("Content-Length",?String.valueOf(data.length));??conn.setRequestProperty("Connection",?"Keep-Alive");????DataOutputStream?outStream?=?new?DataOutputStream(conn.getOutputStream());??outStream.write(data);??outStream.flush();??outStream.close();??if(conn.getResponseCode()==200){??return?StreamTool.readInputStream(conn.getInputStream());??}??return?null;??}??}???? ?
轉載于:https://blog.51cto.com/mzh3344258/687233
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