Android上传图片到服务器，,android上传图片到

Android上传图片到服务器，,android上传图片到

android上传图片到服务器（使用base64字节流的形式通过AsyncHttpClient框架)

前端andoidactivity用到的函数AsyncHttpClient是一个框架提供的库可以异步传输，使用时需下载android-async-http-1.4.4.jar包导入到项目中.```java

public static void reg(final Context cont,Bitmap photodata,String regData) {          try {              ByteArrayOutputStream baos = new ByteArrayOutputStream();            //将bitmap一字节流输出 Bitmap.CompressFormat.PNG 压缩格式，100：压缩率，baos：字节流              photodata.compress(Bitmap.CompressFormat.PNG, 100, baos);              baos.close();              byte[] buffer = baos.toByteArray();              System.out.println("图片的大小："+buffer.length);            //将图片的字节流数据加密成base64字符输出              String photo = Base64.encodeToString(buffer, 0, buffer.length,Base64.DEFAULT);            //photo=URLEncoder.encode(photo,"UTF-8");              RequestParams params = new RequestParams();                      params.put("photo", photo);                          params.put("name", "woshishishi");//传输的字符数据                          String url = "http://10.0.2.2:8080/IC_Server/servlet/RegisterServlet1";                        AsyncHttpClient client = new AsyncHttpClient();                          client.post(url, params, new AsyncHttpResponseHandler() {                          @Override                        public void onSuccess(int statusCode, String content){                        Toast.makeText(cont, "头像上传成功!"+content, 0)                       .show();                            }                        @Override                        public void onFailure(Throwable e, String data){                        Toast.makeText(cont, "头像上传失败!", 0)                          .show();                   }              });        } catch (Exception e) {              e.printStackTrace();          }    }

服务器中serverlet中的代码：```java package uestc.app.ic.server.servlet;  import java.io.File;  import java.io.FileOutputStream;  import java.io.IOException;  import javax.servlet.ServletException;  import javax.servlet.http.HttpServlet;  import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;  import sun.misc.BASE64Decoder;  public class RegisterServlet1 extends HttpServlet {      public void doGet(HttpServletRequest request, HttpServletResponse response)              throws ServletException, IOException {          request.setCharacterEncoding("utf-8");          response.setCharacterEncoding("utf-8");          response.setContentType("text/html");          String photo = request.getParameter("photo");          String name = request.getParameter("name");          try {              // 对base64数据进行解码 生成 字节数组，不能直接用Base64.decode（）；进行解密              byte[] photoimg = new BASE64Decoder().decodeBuffer(photo);              for (int i = 0; i < photoimg.length; ++i) {                  if (photoimg[i] < 0) {                      // 调整异常数据                      photoimg[i] += 256;                  }              }              // byte[] photoimg = Base64.decode(photo);//此处不能用Base64.decode（）方法解密，我调试时用此方法每次解密出的数据都比原数据大  所以用上面的函数进行解密，在网上直接拷贝的，花了好几个小时才找到这个错误（菜鸟不容易啊）              System.out.println("图片的大小：" + photoimg.length);              File file = new File("e:", "decode.png");              File filename = new File("e:\\name.txt");              if (!filename.exists()) {                  file.createNewFile();              }              if (!file.exists()) {                  file.createNewFile();              }              FileOutputStream out = new FileOutputStream(file);              FileOutputStream out1 = new FileOutputStream(filename);              out1.write(name.getBytes());              out.write(photoimg);              out.flush();              out.close();              out1.flush();              out1.close();          } catch (Exception e) {              // TODO Auto-generated catch block              e.printStackTrace();          }