Android(五)数据存储之五网络数据交互.doc

昨天我们只对Android接收网络数据进行了简单介绍，今天我们完成了Android数据存储网络部分的所有内容。在此我将对这非常重要的内容进行总结。本篇日志是对Android与WEB应用服务之间进行数据交互的总结，下篇日志是一个经典而又让人十分好奇的Android多线程断点下载应用的总结。下面我们开始Android与网络数据的交互。一、创建WEB应用服务使用eclipse3.5创建一个动态WEB应用，使用Struts1处理用户请求。我们此应用添加一个DispatchAction，并为它添加四个方法创建用于处理Android以各种方式提交的请求。1.创建动态WEB工程Project name:AndroidWebServerTarget runtime:Apache Tomcat v6.0Dynamic web module version:2.5Configuration:Default Configuration for Apache Tomcat v6.02.添加DispatchActionpackagecom.changcheng.web.struts.actions;importjava.io.File;importjava.io.FileOutputStream;importjavax.servlet.http.HttpServletRequest;importjavax.servlet.http.HttpServletResponse;importorg.apache.struts.action.ActionForm;importorg.apache.struts.action.ActionForward;importorg.apache.struts.action.ActionMapping;importorg.apache.struts.actions.DispatchAction;importcom.changcheng.web.struts.forms.DataForm;publicclassAndroidWebServerextendsDispatchAction /Andoird以Get方式发送的请求publicActionForward sendDataByGet(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throwsException String name = request.getParameter(name);request.setAttribute(message,Hello + name);returnmapping.findForward(success);/Andoird以Post方式发送的请求publicActionForward sendDataByPost(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throwsException String name = request.getParameter(name);request.setAttribute(message,Hello + name);returnmapping.findForward(success);/ Andoird以表单方式发送的请求publicActionForward sendDataByForm(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throwsException DataForm formbean = (DataForm) form;System.out.println(StrData:+ formbean.getStrData();/获取上传的文件if(formbean.getFileData() !=null& formbean.getFileData().getFileSize() 0) /设置保存目录File dir =newFile(request.getSession().getServletContext().getRealPath(/images);if(!dir.exists()dir.mkdirs();/保存文件FileOutputStream outStream =newFileOutputStream(newFile(dir,formbean.getFileData().getFileName();outStream.write(formbean.getFileData().getFileData();/保存文件outStream.close();returnnull;3.向web.xml添加Struts1的ActionServletstrutsorg.apache.struts.action.ActionServletconfig/WEB-INF/struts-config.xmlstruts*.do4.struts-config.xml二、创建Android应用1.创建Android工程Project name:AndroidWebClientBuildTarget:Android2.1Application name:AndroidWEB应用客户端Package name:com.changcheng.web.clientCreate Activity:AndroidWebClientMin SDK Version:72.AndroidManifest.xmlAndroid应用要访问Internet需要添加权限。3.ClientService类packagecom.changcheng.web.client.service;importjava.io.ByteArrayOutputStream;importjava.io.DataOutputStream;importjava.io.File;importjava.io.FileInputStream;importjava.io.InputStream;.HttpURLConnection;.URL;importjava.util.HashMap;importjava.util.Map;importandroid.os.Environment;importandroid.util.Log;publicclassClientService privatestaticfinalStringTAG=ClientService;/以get方式发送请求publicstaticvoidsendDataToServerByGet()throwsException /主机地址不可以设置为localhost或，必须是本机或其他机器所在Internet网或局域网地址。String path =:8080/AndroidWebServer/server.do?+method=sendDataByGet&name=changcheng;URL url =newURL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(6 * 1000);/请求成功if(conn.getResponseCode() = 200) /获取服务器返回的数据byte data =readStream(conn.getInputStream();Log.i(TAG,newString(data,UTF-8);/以Post方式发送请求，面向HTTP协议编程publicstaticvoidsendDataTOserverByPost()throwsException String path =:8080/AndroidWebServer/server.do;String params =method=sendDataByPost&name=tingting;/请求参数byte data = params.getBytes();URL url =newURL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(6 * 1000);conn.setDoOutput(true);/发送POST请求必须设置允许输出conn.setUseCaches(false);/不使用Cacheconn.setRequestMethod(POST);conn.setRequestProperty(Connection,Keep-Alive);/维持长连接conn.setRequestProperty(Charset,UTF-8);conn.setRequestProperty(Content-Length, String.valueOf(data.length);conn.setRequestProperty(Content-Type,application/x-www-form-urlencoded);DataOutputStream outStream =newDataOutputStream(conn.getOutputStream();outStream.write(data);/以内容实体方式发送请求参数outStream.flush();outStream.close();/请求成功if(conn.getResponseCode() = 200) /获取服务器返回的数据byte html =readStream(conn.getInputStream();Log.i(TAG,newString(html,UTF-8);/以表单方式发送请求publicstaticvoidsendDataToServerByForm()throwsException Map params =newHashMap();params.put(method,sendDataByForm);params.put(strData,字符串数据);/获取SDCard中的good.jpgFile file =newFile(Environment.getExternalStorageDirectory(),app_Goog_Android_w.png);FormFile fileData =newFormFile(app_Goog_Android_w.png,newFileInputStream(file),fileData,application/octet-stream);HttpRequester.post(:8080/AndroidWebServer/server.do, params,fileData);/获取输入流数据privatestaticbyte readStream(InputStream inStream)throwsException byte buffer =newbyte1024;intlen = -1;ByteArrayOutputStream outStream =newByteArrayOutputStream();while(len = inStream.read(buffer) != -1) outStream.write(buffer, 0, len);byte data = outStream.toByteArray();outStream.close();inStream.close();returndata;其中使用到的FormFile类：packagecom.changcheng.web.client.service;importjava.io.InputStream;/*上传文件*/publicclassFormFile /*上传文件的数据*/privatebytedata;privateInputStreaminStream;/*文件名称*/privateStringfilname;/*表单字段名称*/privateStringformname;/*内容类型*/privateStringcontentType=application/octet-stream;publicFormFile(String filname,byte data, String formname, String contentType) this.data= data;this.filname= filname;this.formname= formname;if(contentType!=null)this.contentType= contentType;publicFormFile(String filname, InputStream inStream, String formname, String contentType) this.filname= filname;this.formname= formname;this.inStream= inStream;if(contentType!=null)this.contentType= contentType;publicInputStream getInStream() returninStream;publicvoidsetInStream(InputStream inStream) this.inStream= inStream;publicbyte getData() returndata;publicvoidsetData(byte data) this.data= data;publicString getFilname() returnfilname;publicvoidsetFilname(String filname) this.filname= filname;publicString getFormname() returnformname;publicvoidsetFormname(String formname) this.formname= formname;publicString getContentType() returncontentType;publicvoidsetContentType(String contentType) this.contentType= contentType;其中使用到的HttpRequester类：packagecom.changcheng.web.client.service;importjava.io.DataOutputStream;importjava.io.InputStream;.HttpURLConnection;.URL;importjava.util.ArrayList;importjava.util.List;importjava.util.Map;importorg.apache.http.HttpResponse;importorg.apache.http.NameValuePair;importorg.apache.http.client.entity.UrlEncodedFormEntity;importorg.apache.http.client.methods.HttpPost;importorg.apache.http.impl.client.DefaultHttpClient;importorg.apache.http.message.BasicNameValuePair;tocol.HTTP;importorg.apache.http.util.EntityUtils;importandroid.util.Log;/*http请求发送器*/publicclassHttpRequester /*直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能:*paramactionUrl上传路径(注：避免使用localhost或这样的路径测试，因为它会指向手机模拟器，你可以使用或0:8080这样的路径测试)*paramparams请求参数key为参数名,value为参数值*paramfile上传文件*/publicstaticString post(String actionUrl, Map params, FormFile files) tryString BOUNDARY =-7d 4a6d158c9;/数据分隔线String MULTIPART_FORM_DATA =multipart/form-data;URL url =newURL(actionUrl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(6* 1000);conn.setDoInput(true);/允许输入conn.setDoOutput(true);/允许输出conn.setUseCaches(false);/不使用Cacheconn.setRequestMethod(POST);conn.setRequestProperty(Connection,Keep-Alive);conn.setRequestProperty(Charset,UTF-8);conn.setRequestProperty(Content-Type, MULTIPART_FORM_DATA +; boundary=+ BOUNDARY);StringBuilder sb =newStringBuilder();for(Map.Entry entry : params.entrySet() /构建表单字段内容sb.append(-);sb.append(BOUNDARY);sb.append(rn);sb.append(Content-Disposition: form-data; name=+ entry.getKey() +rnrn);sb.append(entry.getValue();sb.append(rn);DataOutputStream outStream =newDataOutputStream(conn.getOutputStream();outStream.write(sb.toString().getBytes();/发送表单字段数据for(FormFile file : files)/发送文件数据StringBuilder split =newStringBuilder();split.append(-);split.append(BOUNDARY);split.append(rn);split.append(Content-Disposition: form-data;name=+ file.getFormname()+;filename=+ file.getFilname() +rn);split.append(Content-Type: + file.getContentType()+rnrn);outStream.write(split.toString().getBytes();if(file.getInStream()!=null)byte buffer =newbyte1024;intlen = 0;while(len = file.getInStream().read(buffer)!=-1)outStream.write(buffer, 0, len);file.getInStream().close();elseoutStream.write(file.getData(), 0, file.getData().length);outStream.write(rn.getBytes();byte end_data = (-+ BOUNDARY +-rn).getBytes();/数据结束标志outStream.write(end_data);outStream.flush();intcah = conn.getResponseCode();if(cah != 200)thrownewRuntimeException(请求url失败);InputStream is = conn.getInputStream();intch;StringBuilder b =newStringBuilder();while( (ch = is.read() != -1 )b.append(char)ch);Log.i(ItcastHttpPost, b.toString();outStream.close();conn.disconnect();returnb.toString();catch(Exception e) thrownewRuntimeException(e);/*提交数据到服务器*paramactionUrl上传路径(注：避免使用localhost或这样的路径测试，因为它会指向手机模拟器，你可以使用或0:8080这样的路径测试)*paramparams请求参数key为参数名,value为参数值*paramfile上传文件*/publicstat