android中使用HTTP协议和TCP协议实现上传文件

android服务器端上传方法：    package cn.test.web.servlet;            import java.io.File;      import java.io.IOException;      import java.util.List;            import javax.servlet.ServletException;      import javax.servlet.http.HttpServlet;      import javax.servlet.http.HttpServletRequest;      import javax.servlet.http.HttpServletResponse;            import org.apache.commons.fileupload.FileItem;      import org.apache.commons.fileupload.FileItemFactory;      import org.apache.commons.fileupload.disk.DiskFileItemFactory;      import org.apache.commons.fileupload.servlet.ServletFileUpload;            public class LoginServlet extends HttpServlet {                private static final long serialVersionUID = 1L;                @Override          public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {              doPost(request, response);          }                @Override          public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {              boolean isMultipart = ServletFileUpload.isMultipartContent(request);              if (isMultipart)                  try {                      FileItemFactory factory = new DiskFileItemFactory();                      ServletFileUpload upload = new ServletFileUpload(factory);                      List<FileItem> items = upload.parseRequest(request);                      File dir = new File(request.getSession().getServletContext().getRealPath("/WEB-INF/upload"));                      //创建目录                      dir.mkdir();                      for (FileItem item : items)                          if (item.isFormField())                              System.out.println(item.getFieldName() + ": " + item.getString());                          else{                              item.write(new File(dir,item.getName().substring(item.getName().lastIndexOf("\\")+1)));                          }                  } catch (Exception e) {                      e.printStackTrace();                  }              else {                  System.out.println(request.getMethod());                  System.out.println(request.getParameter("username"));                  System.out.println(request.getParameter("password"));              }          }      }

android客户器端上传方法：首先，要有一个javaBean类FormFile封装文件的信息：public class FormFile {/* 上传文件的数据 */private byte[] data;/* 文件名称 */private String filname;/* 表单字段名称*/private String formname;/* 内容类型 */private String contentType = "application/octet-stream"; //需要查阅相关的资料public FormFile(String filname, byte[] data, String formname, String contentType) {  this.data = data;  this.filname = filname;  this.formname = formname;  if(contentType!=null) this.contentType = contentType;}public byte[] getData() {  return data;}public void setData(byte[] data) {  this.data = data;}public String getFilname() {  return filname;}public void setFilname(String filname) {  this.filname = filname;}public String getFormname() {  return formname;}public void setFormname(String formname) {  this.formname = formname;}public String getContentType() {  return contentType;}public void setContentType(String contentType) {  this.contentType = contentType;}}

实现文件上传的代码如下：/*** 直接通过HTTP协议提交数据到服务器,实现表单提交功能* @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 String post(String actionUrl, Map<String, String> params, FormFile[] files) {      try {                    String BOUNDARY = “———7d4a6d158c9″; //数据分隔线          String MULTIPART_FORM_DATA = “multipart/form-data”;                   URL url = new URL(actionUrl);          HttpURLConnection conn = (HttpURLConnection) url.openConnection();          conn.setDoInput(true);//允许输入          conn.setDoOutput(true);//允许输出          conn.setUseCaches(false);//不使用Cache          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();                   //上传的表单参数部分，格式请参考文章          for (Map.Entry<String, String> entry : params.entrySet()) {//构建表单字段内容              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());//发送表单字段数据                   //上传的文件部分，格式请参考文章          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());              outStream.write(file.getData(), 0, file.getData().length);              outStream.write(”\r\n”.getBytes());          }          byte[] end_data = (”–” + BOUNDARY + “–\r\n”).getBytes();//数据结束标志                   outStream.write(end_data);          outStream.flush();          int cah = conn.getResponseCode();          if (cah != 200) throw new RuntimeException(”请求url失败”);          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);      }  }

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