1、包版本:httpclient-4.5.3.jar,httpcore-4.4.6.jar,httpmime-4.5.3.jar
2、本地同一服务器通过httpclient调用可以获取到传递的参数( **通过**)
3、本地不同服务器通过httpclient调用可以获取到传递的参数( **通过**)
4、远程服务器通过httpclient调用不能获取到传递的参数( **不通过**)
5、已确保参数名一致,因为换一种写法可以获取到参数
代码:
/** * 提交数据,返回JSONObject对象 * * @param url 请求路径 * @param headerParams 请求头消息参数 * @param requestParams 请求业务参数 * * @return */ public static JSONObject httpPostToJson(String url,JSONObject headerParams,JSONObject requestParams) { HttpPost httpPost = null; JSONObject jsonObject = new JSONObject(); try { // 创建HttpClient实例 HttpClient httpClient = HttpClients.createDefault(); // 创建httpPost实例,设置超时和头消息 httpPost = createHttpPost(url,headerParams); //设置httpPost请求参数 setHttpRequestParams(httpPost, requestParams); //执行httpPost请求 jsonObject = executeHttpClient(httpClient, httpPost); } catch (Exception e) { e.printStackTrace(); jsonObject.put("code", ERROR_STATUS_CODE); jsonObject.put("msg", "服务器遇到错误,无法完成请求"); jsonObject.put("data", "{}"); }finally{ if(httpPost != null){ httpPost.abort(); } } /** * 创建httpPost请求,设置超时和头消息 * * @param _url 请求路径 * @param headerParams 头参数集合 * @return */ private static HttpPost createHttpPost(String _url, JSONObject headerParams)throws Exception{ // 创建Post方法实例 HttpPost httpPost = new HttpPost(_url); // 设置连接超时 RequestConfig requestConfig = RequestConfig.custom() .setConnectTimeout(CONNECT_TIME_OUT).setConnectionRequestTimeout(CONNECTION_REQUEST_TIME_OUT) .setSocketTimeout(SOCKET_TIME_OUT).build(); httpPost.setConfig(requestConfig); // 构造消息头 //设置头参数 if(headerParams != null){ for(Object key : headerParams.keySet()){ httpPost.setHeader(key.toString(), headerParams.getString(key.toString())); } } return httpPost; } /** * 设置请求参数 * * @param httpPost * @param jsonObj * @param in */ private static void setHttpRequestParams(HttpPost httpPost,JSONObject jsonObj)throws Exception{ MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builderHttpRequestParams(httpPost, builder, jsonObj); } /** * 设置请求参数 * * @param httpPost * @param jsonObj * @param in */ private static void builderHttpRequestParams(HttpPost httpPost,MultipartEntityBuilder builder,JSONObject jsonObj)throws Exception{ if(jsonObj != null){ for(Object key : jsonObj.keySet()){ builder.addTextBody(key.toString(), jsonObj.getString(key.toString())); } } HttpEntity entity = builder.build(); httpPost.setEntity(entity); }
解决方案( 不是所有环境都能用):
public void processUpload(HttpServletRequest request, HttpServletResponse response){ //检测是不是存在上传文件 boolean isMultipart = ServletFileUpload.isMultipartContent(request); if(isMultipart){ DiskFileItemFactory factory = new DiskFileItemFactory(); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); Listitems = null; try { // 解析request请求 items = upload.parseRequest(request); } catch (FileUploadException e) { e.printStackTrace(); } if(items!=null){ //解析表单项目 Iterator iter = items.iterator(); while (iter.hasNext()) { FileItem item = iter.next(); //如果是普通表单属性 if (item.isFormField()) { //相当于input的name属性 String name = item.getFieldName(); //input的value属性 String value = item.getString(); System.out.println("属性:" + name + " 属性值:" + value); } //如果是上传文件 else { //属性名 String fieldName = item.getFieldName(); //上传文件路径 String fileName = item.getName(); fileName = fileName.substring(fileName.lastIndexOf("/") + 1);// 获得上传文件的文件名 } } } } }