android手机客户端上传文件，java servlet服务器端接收并保存到服务器

android客户端代码： 

Java代码  



public class MainActivity extends Activity  

{  

    private TextView uploadInfo;  

  

    @Override  

    protected void onCreate(Bundle savedInstanceState)  

    {  

        super.onCreate(savedInstanceState);  

        setContentView(R.layout.activity_main);  

          

        uploadInfo = (TextView) findViewById(R.id.upload_info);  

  

        uploadFile();  

    }  

  

    public void uploadFile()  

    {  

        //服务器端地址  

        String url = "http://192.168.0.108:8080/UploadFileServer/upload";  

        //手机端要上传的文件，首先要保存你手机上存在该文件  

        String filePath = Environment.getExternalStorageDirectory()  

                + "/1/power.apk";  

  

        AsyncHttpClient httpClient = new AsyncHttpClient();  

  

        RequestParams param = new RequestParams();  

        try  

        {  

            param.put("file", new File(filePath));  

            param.put("content", "liucanwen");  

              

            httpClient.post(url, param, new AsyncHttpResponseHandler()  

            {  

                @Override  

                public void onStart()  

                {  

                    super.onStart();  

                      

                    uploadInfo.setText("正在上传...");  

                }  

                  

                @Override  

                public void onSuccess(String arg0)  

                {  

                    super.onSuccess(arg0);  

  

                    Log.i("ck", "success>" + arg0);  

                      

                    if(arg0.equals("success"))  

                    {  

                        Toast.makeText(MainActivity.this, "上传成功！", 1000).show();  

                    }  

                      

                    uploadInfo.setText(arg0);  

                }  

                  

                @Override  

                public void onFailure(Throwable arg0, String arg1)  

                {  

                    super.onFailure(arg0, arg1);  

                      

                    uploadInfo.setText("上传失败！");  

                }  

            });  

              

        } catch (FileNotFoundException e)  

        {  

            e.printStackTrace();  

            Toast.makeText(MainActivity.this, "上传文件不存在！", 1000).show();  

        }  

    }  

}  

服务器端代码： 

Java代码  



public class UploadFileServlet extends HttpServlet  

{  

  

    public void doPost(HttpServletRequest request, HttpServletResponse response)  

            throws ServletException, IOException  

    {  

        response.setContentType("text/html");  

        PrintWriter out = response.getWriter();  

  

        // 创建文件项目工厂对象  

        DiskFileItemFactory factory = new DiskFileItemFactory();  

  

        // 设置文件上传路径  

        String upload = this.getServletContext().getRealPath("/upload/");  

        // 获取系统默认的临时文件保存路径，该路径为Tomcat根目录下的temp文件夹  

        String temp = System.getProperty("java.io.tmpdir");  

        // 设置缓冲区大小为 5M  

        factory.setSizeThreshold(1024 * 1024 * 5);  

        // 设置临时文件夹为temp  

        factory.setRepository(new File(temp));  

        // 用工厂实例化上传组件,ServletFileUpload 用来解析文件上传请求  

        ServletFileUpload servletFileUpload = new ServletFileUpload(factory);  

  

        // 解析结果放在List中  

        try  

        {  

            List<FileItem> list = servletFileUpload.parseRequest(request);  

  

            for (FileItem item : list)  

            {  

                String name = item.getFieldName();  

                InputStream is = item.getInputStream();  

  

                if (name.contains("content"))  

                {  

                    System.out.println(inputStream2String(is));  

                } else if(name.contains("file"))  

                {  

                    try  

                    {  

                        inputStream2File(is, upload + "\\" + item.getName());  

                    } catch (Exception e)  

                    {  

                        e.printStackTrace();  

                    }  

                }  

            }  

              

            out.write("success");  

        } catch (FileUploadException e)  

        {  

            e.printStackTrace();  

            out.write("failure");  

        }  

  

        out.flush();  

        out.close();  

    }  

  

    // 流转化成字符串  

    public static String inputStream2String(InputStream is) throws IOException  

    {  

        ByteArrayOutputStream baos = new ByteArrayOutputStream();  

        int i = -1;  

        while ((i = is.read()) != -1)  

        {  

            baos.write(i);  

        }  

        return baos.toString();  

    }  

  

    // 流转化成文件  

    public static void inputStream2File(InputStream is, String savePath)  

            throws Exception  

    {  

        System.out.println("文件保存路径为:" + savePath);  

        File file = new File(savePath);  

        InputStream inputSteam = is;  

        BufferedInputStream fis = new BufferedInputStream(inputSteam);  

        FileOutputStream fos = new FileOutputStream(file);  

        int f;  

        while ((f = fis.read()) != -1)  

        {  

            fos.write(f);  

        }  

        fos.flush();  

        fos.close();  

        fis.close();  

        inputSteam.close();  

          

    }  

  

}