前台图片处理：（传Bitmap对象即可）

/**  * 通过Base32将Bitmap转换成Base64字符串  * @param bit  * @return  */  public String Bitmap2StrByBase64(Bitmap bit){     ByteArrayOutputStream bos=new ByteArrayOutputStream();     bit.compress(CompressFormat.JPEG, 40, bos);//参数100表示不压缩     byte[] bytes=bos.toByteArray();     return Base64.encodeToString(bytes, Base64.DEFAULT);  }

前台发送数据：（調用setImgByStr()方法，第一個參數imgStr 为Bitmap转成Base64的字符串，第二个参数imgName为图片的名字，包含后缀名.jpg）

public static String host = "http://192.168.1.166:8080/ImageServer/";    public static String getContent(String url) throws Exception {        StringBuilder sb = new StringBuilder();        HttpClient client = new DefaultHttpClient();      HttpParams httpParams = client.getParams();      // 设置网络超时参数      HttpConnectionParams.setConnectionTimeout(httpParams, 3000);        HttpConnectionParams.setSoTimeout(httpParams, 5000);      HttpResponse response = client.execute(new HttpGet(url));      HttpEntity entity = response.getEntity();      if (entity != null) {          BufferedReader reader = new BufferedReader(new InputStreamReader(                  entity.getContent(), "UTF-8"), 8192);            String line = null;          while ((line = reader.readLine()) != null) {              sb.append(line + "\n");          }          reader.close();        }        return sb.toString();  }  public static HttpResponse post(Map
    
      params, String url) {        HttpClient client = new DefaultHttpClient();      HttpPost httpPost = new HttpPost(url);      httpPost.addHeader("charset", HTTP.UTF_8);      httpPost.setHeader("Content-Type",              "application/x-www-form-urlencoded; charset=utf-8");      HttpResponse response = null;      if (params != null && params.size() > 0) {          List
     
       nameValuepairs = new ArrayList
      
       ();          for (String key : params.keySet()) {              nameValuepairs.add(new BasicNameValuePair(key, (String) params                      .get(key)));          }          try {              httpPost.setEntity(new UrlEncodedFormEntity(nameValuepairs,                      HTTP.UTF_8));              response = client.execute(httpPost);          } catch (UnsupportedEncodingException e) {              e.printStackTrace();          } catch (ClientProtocolException e) {              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();          } catch (RuntimeException e) {              e.printStackTrace();          }      } else {          try {              response = client.execute(httpPost);          } catch (ClientProtocolException e) {              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();          }      }        return response;    }  public static Object getValues(Map
       
         params, String url) {      String token = "";      HttpResponse response = post(params, url);      if (response != null) {          try {              token = EntityUtils.toString(response.getEntity());              response.removeHeaders("operator");          } catch (ParseException e) {              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();          }      }      return token;  }  public static Object setImgByStr(String imgStr,String imgName){      String url =  host+"channel-uploadImage.action";      Map
        
          params = new HashMap
         
          (); params.put("imgStr", imgStr); params.put("imgName", imgName); return getValues(params, url); }
         
        
       
      
     
    

后台接收数据：

public void uploadPhoto() {      //获取存储路径      HttpServletRequest request = ServletActionContext.getRequest();      String path = ServletActionContext.getServletContext().getRealPath("/")+"upload";      File file = new File(path);      if(!file.exists()){          file.mkdir();      }      String imgPath  = path + request.getParameter("imgName");      String imgStr = request.getParameter("imgStr");      boolean flag = string2Image(imgStr, imgPath);      JacksonUtil.responseJSON(response, flag);  }

后台图片处理：

/**  * 通过BASE64Decoder解码，并生成图片  * @param imgStr 解码后的string  */  public boolean string2Image(String imgStr, String imgFilePath) {      // 对字节数组字符串进行Base64解码并生成图片      if (imgStr == null)          return false;      try {          // Base64解码          byte[] b = new BASE64Decoder().decodeBuffer(imgStr);          for (int i = 0; i < b.length; ++i) {              if (b[i] < 0) {                  // 调整异常数据                  b[i] += 256;              }          }          // 生成Jpeg图片          OutputStream out = new FileOutputStream(imgFilePath);          out.write(b);          out.flush();          out.close();          return true;      } catch (Exception e) {          return false;      }  }