android客户端上传文件.docx

前天开始要准备实现手机端往服务器传参数，还要能传附件，找了不少文章和资料，现在总结一下分享分享：代码中的catch什么的就省略了，尝试了图片、txt、xml是没问题的. 各位 尽情拍砖吧。发完发现代码部分的格式这个编辑器不太会用，怎么感觉把换行都去掉了,处理好换行缩进也首先我是写了个java工程测试发送post请求：可以包含文本参数和文件参数*/* 通过http协议提交数据到服务端，实现表单提交功能，包括上传文件* param actionUrl 上传路径 * param params 请求参数 key为参数名,value为参数值 * param file 上传文件 */public static void postMultiParams(String actionUrl, Map params, FormBean files) try PostMethod post = new PostMethod(actionUrl);List formParams = new ArrayList();for(Map.Entry entry : params.entrySet()formParams.add(new StringPart(entry.getKey(), entry.getValue();if(files!=null)for(FormBean file : files)/filename为在服务端接收时希望保存成的文件名，filepath是本地文件路径(包括了源文件名)，filebean中就包含了这俩属性formParams.add(new FilePart(file, file.getFilename(), new File(file.getFilepath();Part parts = new PartformParams.size();Iterator pit = formParams.iterator();int i=0;while(pit.hasNext()partsi+ = pit.next();/如果出现乱码可以尝试一下方式/StringPart sp = new StringPart(TEXT, testValue, GB2312);/FilePart fp = new FilePart(file, test.txt, new File(./temp/test.txt), null, GB2312/postMethod.getParams().setContentCharset(GB2312); MultipartRequestEntity mrp = new MultipartRequestEntity(parts, post.getParams();post.setRequestEntity(mrp);/execute post methodHttpClient client = new HttpClient();int code = client.executeMethod(post);System.out.println(code); catch .复制代码通过以上代码可以成功的模拟java客户端发送post请求，服务端也能接收并保存文件java端测试的main方法： public static void main(String args)String actionUrl = 23:8080/WSserver/androidUploadServlet;Map strParams = new HashMap();strParams.put(paramOne, valueOne);strParams.put(paramTwo, valueTwo);FormBean files = new FormBeannew FormBean(dest1.xml, F:/testpostsrc/main.xml);HttpTool.postMultiParams(actionUrl,strParams,files);复制代码本以为大功告成了，结果一移植到android工程中，编译是没有问题的。但是运行时抛了异常 先是说找不到PostMethod类，mons.httpclient.methods.PostMethod这个类绝对是有包含的；还有个异常就是VerifyError。 开发中有几次碰到这个异常都束手无策，觉得是SDK不兼容还是怎么地，哪位知道可得跟我说说于是看网上有直接分析http request的内容构建post请求的，也有找到带上传文件的，拿下来运行老是有些问题，便直接通过运行上面的java工程发送的post请求，在servlet中打印出请求内容，然后对照着拼接字符串和流终于给实现了！代码如下：*/* 通过拼接的方式构造请求内容，实现参数传输以及文件传输* param actionUrl* param params* param files* return* throws IOException*/public static String post(String actionUrl, Map params, Map files) throws IOException String BOUNDARY = java.util.UUID.randomUUID().toString();String PREFIX = - , LINEND = rn;String MULTIPART_FROM_DATA = multipart/form-data; String CHARSET = UTF-8;URL uri = new URL(actionUrl); HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); conn.setReadTimeout(5 * 1000); / 缓存的最长时间 conn.setDoInput(true);/ 允许输入 conn.setDoOutput(true);/ 允许输出 conn.setUseCaches(false); / 不允许使用缓存 conn.setRequestMethod(POST); conn.setRequestProperty(connection, keep-alive); conn.setRequestProperty(Charsert, UTF-8); conn.setRequestProperty(Content-Type, MULTIPART_FROM_DATA + ;boundary= + BOUNDARY); / 首先组拼文本类型的参数 StringBuilder sb = new StringBuilder(); for (Map.Entry entry : params.entrySet() sb.append(PREFIX); sb.append(BOUNDARY); sb.append(LINEND); sb.append(Content-Disposition: form-data; name= + entry.getKey() + + LINEND);sb.append(Content-Type: text/plain; charset= + CHARSET+LINEND);sb.append(Content-Transfer-Encoding: 8bit + LINEND);sb.append(LINEND);sb.append(entry.getValue(); sb.append(LINEND); DataOutputStream outStream = new DataOutputStream(conn.getOutputStream(); outStream.write(sb.toString().getBytes(); / 发送文件数据 if(files!=null)for (Map.Entry file: files.entrySet() StringBuilder sb1 = new StringBuilder(); sb1.append(PREFIX); sb1.append(BOUNDARY); sb1.append(LINEND); sb1.append(Content-Disposition: form-data; name=file; filename=+file.getKey()+LINEND);sb1.append(Content-Type: application/octet-stream; charset=+CHARSET+LINEND);sb1.append(LINEND);outStream.write(sb1.toString().getBytes(); InputStream is = new FileInputStream(file.getValue();byte buffer = new byte1024; int len = 0; while (len = is.read(buffer) != -1) outStream.write(buffer, 0, len); is.close(); outStream.write(LINEND.getBytes(); /请求结束标志byte end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes(); outStream.write(end_data); outStream.flush(); / 得到响应码 int res = conn.getResponseCode(); if (res = 200) InputStream in = conn.getInputStream(); int ch; StringBuilder sb2 = new StringBuilder(); while (ch = in.read() != -1) sb2.append(char) ch); outStream.close(); conn.disconnect(); return in.toString(); 复制代码*button响应中的代码：*public void onClick(View v)String actionUrl = getApplicationContext().getString(R.string.wtsb_req_upload);Map params = new HashMap();params.put(strParamName, strParamValue);Map files = new HashMap();files.put(tempAndroid.txt, new File(/sdcard/temp.txt);try HttpTool.postMultiParams(actionUrl, params, files); catch .复制代码*服务器端servlet代码：*public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException /print request.getInputStream to check request content/HttpTool.printStreamContent(request.getInputStream();RequestContext req = new ServletRequestContext(request);if(FileUpload.isMultipartContent(req)DiskFileItemFactory factory = new DiskFileItemFactory();ServletFileUpload fileUpload = new ServletFileUpload(factory);fileUpload.setFileSizeMax(FILE_MAX_SIZE);List items = new ArrayList();try items = fileUpload.parseRequest(request); catch .Iterator it = items.iterator();while(it.hasNext()FileItem fileItem = (FileItem)it.next();if(fileItem.isFormField()System.out.println(fileItem.getFieldName()+ +fileItem.getName()+ +new String(fileItem.getString().getBytes(ISO-8859-1),GBK); else System.out.println(fileItem.getFieldName()+ +fileItem.getName()+ +fileItem.isInMemory()+ +fileItem.getContentType()+ +fileItem.getSize();if(fileItem.getName()!=null & fileItem.getSize()!=0)File fullFile = new File(fileItem.getName();File newFile = new File(FILE_SAVE_PATH+fullFile.getName();try fileItem.write(newFile); catch . else System.out.println(no file choosen or empty file);public void init() throws ServletException /读取在web.xml中配置的init-param FILE_MAX_SIZE = Long.parseLong(this.getInitParameter(file_max_size);/上传文件大小限制FILE_SAVE_PATH = this.getInitParameter(file_save_path);/文件保存位置复制代码发送post请求的方法：/ 通过POST将本地数据发送给服务器,string参数表public static String sendDataByPost(String url, List datas