android之网络文件上传下载源码

1、android 之网络文件上传下载源码01:54AMLinearLayoutxmlns:android=http: SD 卡目录publicFileUtils()SDPATH=Environment.getExternalStorageDirectory()+/;System.out.println(sdcardsdirectorypathis:+SDPATH);)/在 SD 卡上创建文件publicFilecreateSDFile(StringfileName)throwsIOExceptionFilefile=newFile(SDPATH+fileName);file.createNewF

2、ile();returnfile;)/在 SD 卡上创建目录publicFilecreateSDDir(StringdirName)Filedir=newFile(SDPATH+dirName);System.out.println(storgedevicesstate:+Environment.getExternalStorageState();if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)System.out.println(thisdirectoryrealpathis:+dir.get

3、AbsolutePath();System.out.println(theresultofmakingdirectory:+dir.mkdir();)returndir;)判断 SD 卡的文件夹是否存在publicbooleanisFileExist(StringfileName)Filefile=newFile(SDPATH+fileName);returnfile.exists();)将一个 inputStream 里面的数据写入到 SD 卡中publicFilewrite2SDFromInput(Stringpath,StringfileName,InputStreaminputStre

4、am)Filefile=null;OutputStreamoutput=null;tryFiletempf=createSDDir(path);System.out.println(directoryinthesdcard:+tempf.exists();file=createSDFile(path+fileName);output=newFileOutputStream(file);bytebuffer=newbyte4*1024;intlength=0;while(length=inputStream.read(buffer)!=-1)output.write(buffer,0,lengt

5、h);System.out.println(length);)output.flush();catch(FileNotFoundExceptione)e.printStackTrace();catch(IOExceptione)e.printStackTrace();finallytryoutput.close();catch(IOExceptione)e.printStackTrace();returnfile;HttpDownloader.java:;importjava.io.BufferedReader;importjava.io.File;importjava.io.IOExcept

6、ion;importjava.io.InputStream;importjava.io.InputStreamReader;.HttpURLConnection;.MalformedURLException;.URL;publicclassHttpDownloaderprivateURLurl=null;/* 下载步骤：* 1.创建一个 URL 对象* 2.通过 URL 对象，创建一个 HttpURLConnection 对象* 3.得至 UInputStream* 4.从 InputStream 当中读取数据* /publicStringdownload(StringurlStr)Strin

7、gBuffersb=newStringBuffer();Stringline=null;BufferedReaderbuffer=null;try(url=newURL(urlStr);HttpURLConnectionurlConn=(HttpURLConnection)url.openConnection();buffer=newBufferedReader(newInputStreamReader(urlConn.getInputStream();while(line=buffer.readLine()!=null)sb.append(line);catch(Exceptione)e.p

8、rintStackTrace();finallytrybuffer.close();catch(IOExceptione)e.printStackTrace();returnsb.toString();publicintdownFile(StringurlStr,Stringpath,StringfileName)InputStreaminputStream=null;tryFileUtilsfileUtils=newFileUtils();if(fileUtils.isFileExist(path+fileName)return1;elseinputStream=getInputStream

9、FromURL(urlStr);FileresultFile=fileUtils.write2SDFromInput(path,fileName,inputStream);if(resultFile=null)return-1;catch(Exceptione)e.printStackTrace();return-1;finallytryinputStream.close();catch(IOExceptione)e.printStackTrace();return0;publicInputStreamgetInputStreamFromURL(StringurlStr)HttpURLConn

10、ectionurlConn=null;InputStreaminputStream=null;tryurl=newURL(urlStr);urlConn=(HttpURLConnection)url.openConnection();inputStream=urlConn.getInputStream();catch(MalformedURLExceptione)e.printStackTrace();catch(IOExceptione)e.printStackTrace();returninputStream;HttpUploader.java:;importjava.io.Buffere

11、dReader;importjava.io.InputStreamReader;importjava.io.OutputStream;.InetAddress;.Socket;.URL;importjava.util.Map;publicclassHttpUploaderpublicstaticbooleanpost(Stringpath,Mapparams,FormFile 口files)throwsExceptionfinalStringBOUNDARY=7da2137580612”;finalStringendline=BOUNDARY+”-rn;intfileDataLength=0;

12、for(FormFileuploadFile:files)StringBuilderfileExplain=newStringBuilder();fileExplain.append(-);fileExplain.append(BOUNDARY);fileExplain.append(rn);fileExplain.append(Content-Disposition:form-data;name=+uploadFile.getParameterName()+;filename=+uploadFile.getFilename()+rn);fileExplain.append(Content-T

13、ype:+uploadFile.getContentType()+rnrn);fileExplain.append(rn);fileDataLength+=fileExplain.length();if(uploadFile.getInStream()!=null)fileDataLength+=uploadFile.getFile().length();elsefileDataLength+=uploadFile.getData().length;/*StringBuildertextEntity=newStringBuilder();for(Map.Entryentry:params.en

14、trySet()textEntity.append(-);textEntity.append(BOUNDARY);textEntity.append(rn);textEntity.append(Content-Disposition:form-data;name=+entry.getKey()+rnrn);textEntity.append(entry.getValue();textEntity.append(rn);intdataLength=textEntity.toString().getBytes().length+fileDataLength+endline.getBytes().l

15、ength;*/URLurl=newURL(path);intport=url.getPort()=-1?80:url.getPort();Socketsocket=newSocket(InetAddress.getByName(url.getHost(),port);OutputstreamoutStream=socket.getOutputStream();Stringrequestmethod=POST+url.getPath()+HTTP/1.1rn;outStream.write(requestmethod.getBytes();Stringaccept=Accept:image/g

16、if,image/jpeg,image/pjpeg,application/x-shockwave-flash,application/xaml+xml,application/vnd.ms-xpdocument,application/x-ms-xbap,application/x-ms-application,application/vnd.ms-excel,application/vnd.ms-powerpoint,application/msword,*/*rn;outStream.write(accept.getBytes();Stringlanguage=Accept-Langua

17、ge:zh-CNrn;outStream.write(language.getBytes();Stringcontenttype=Content-Type:multipart/form-data;boundary=+BOUNDARY+rn;outStream.write(contenttype.getBytes();Stringcontentlength=Content-Length:+fileDataLength+rn;/Stringcontentlength=Content-Length:+dataLength+rn;outStream.write(contentlength.getByt

18、es();Stringalive=Connection:Keep-Alivern;outStream.write(alive.getBytes();Stringhost=Host:+url.getHost()+:+port+rn;outStream.write(host.getBytes();写完 HTTP 请求头后根据 HTTP 协议再写一个回车换行outStream.write(rn.getBytes();把所有文本类型的实体数据发送出来/outStream.write(textEntity.toString().getBytes();把所有文件类型的实体数据发送出来for(FormFil

19、euploadFile:files)StringBuilderfileEntity=newStringBuilder();fileEntity.append(-);fileEntity.append(BOUNDARY);fileEntity.append(rn);fileEntity.append(Content-Disposition:form-data;name=+uploadFile.getParameterName()+;filename=+uploadFile.getFilename()+rn);fileEntity.append(Content-Type:+uploadFile.g

20、etContentType()+rnrn);outStream.write(fileEntity.toString().getBytes();if(uploadFile.getInStream()!=null)bytebuffer=newbyte1024;intlen=0;while(len=uploadFile.getInStream().read(buffer,0,1024)!=-1)outStream.write(buffer,0,len);uploadFile.getInStream().close();elseoutStream.write(uploadFile.getData(),

21、0,uploadFile.getData().length);outStream.write(rn.getBytes();outStream.write(rn.getBytes();下面发送数据结束标志，表示数据已经结束outStream.write(endline.getBytes();/*BufferedReaderreader=newBufferedReader(newInputStreamReader(socket.getInputStream();if(reader.readLine().indexOf(200)=-1)读取 web 服务器返回的数据，判断请求码是否为 200,如果不

22、是 200,代表请求失败returnfalse;*/outStream.flush();outStream.close();/reader.close();socket.close();returntrue;)/*提交数据到服务器*parampath 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 http:/ 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*/publicstaticboolean

23、post(Stringpath,MapString,Stringparams,FormFilefile)throwsExceptionreturnpost(path,params,newFormFilefile);)HttpclientActivity.java:;importjava.io.File;importjava.util.HashMap;importjava.util.Map;importandroid.app.Activity;importandroid.os.Bundle;importandroid.os.Environment;importandroid.os.Handler

24、;importandroid.util.Log;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.EditText;publicclassHttpclientActivityextendsActivityprivateEditTextdownloadText;privateButtondownloadButton;privateEditTextuploadfileText;privateButtonuploadButto

25、n;privateFilefile;privateHandlerhandler;privatestaticfinalStringTAG=MainActivity;/*Calledwhentheactivityisfirstcreated.*/OverridepublicvoidonCreate(BundlesavedInstanceState)super.onCreate(savedlnstanceState);setContentView(R.layout.main);downloadText=(EditText)findViewById(R.id.downloadfile);downloa

26、dButton=(Button)findViewById(R.id.download);downloadButton.setOnClickListener(newDownloadListener();uploadfileText=(EditText)findViewById(R.id.uploadfile);uploadButton=(Button)findViewById(R.id.upload);uploadButton.setOnClickListener(newUploadfileListener();classDownloadListenerimplementsOnClickListenerpublicvoidonClick(Viewv)Stringdownloadmsg=downloadText.getText().toString();