Question

我正在使用XMLHttpRequest使用javascript发送ajax请求，但参数

“_ MNAME = ABC＆安培;代码= 1”

发送到servlet的

不会存储在fileItems上，即

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

当我遍历fileItems并打印它时，没有打印出来。我正在使用multipart / form-data发送它，因为我稍后会添加fileupload。但目前只发送参数（表单参数这只是一个片段）我怎么能让它接受我发送的参数，然后在servlet上接收它我非常想使用这个servlet而不想创建其他的servlet （虽然欢迎提出建议）

当我发送正常的多部分请求时，servlet正常运行没有任何问题，但在ajax请求的情况下不一样

我无法设置

requestObject.setRequestHeader（ “内容长度”，param.length）; requestObject.setRequestHeader（ “连接”， “关闭”）;

它给我错误405不安全的操作是什么原因，是否有必要发送ajax请求？我还想使用multipart / form-data发送请求。我是否正确发送了ajax请求？ servlet有什么问题吗？我怎样才能读取servlet中的有效负载？请指导我可能错在哪里？

这是代码

    var requestObject = null;
    function createRequestObject(){
        try{
            requestObject = new XMLHttpRequest();
        }
        catch(e){

            try{
                requestObject = new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch(e){
                try{
                    requestObject = new ActiveXObject("Microsoft.XMLHTTP");
                }
                catch(e){
                    alert("update your browser");
                }
            }
        }
        return requestObject;
    }

    function sendAjaxRequest(){
        var requestObject = createRequestObject();
        if(requestObject){
            requestObject.open("POST","personaldetails.do",true);
            var boundary = "----rrrrrr----";
            requestObject.setRequestHeader("Content-type","multipart/form-data; charset=utf-8; boundary=" + boundary);
            //requestObject.setRequestHeader("Content-length",param.length);    //when this line is opened it gives 405 error refused unsafe operation what is the reason form the error?
            //requestObject.setRequestHeader("connection","close");     //when this line is opened it gives 405 error refused unsafe operation what is the reason form the error?
            requestObject.onreadystatechange = sendRequest;
            requestObject.send("_mname=abc&code=1");
        }
    }
    function sendRequest(){
        if(requestObject.readyState == 4 && requestObject.status == 200){
            if(requestObject.responseText){
                console.log("update successfull");
            }
        }
    }


    public class PersonalDetailsServlet extends HttpServlet{
        public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException{

        if(ServletFileUpload.isMultipartContent(request)){
            System.out.println("request is multipart");

            DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
            ServletFileUpload servletFileUpload = new ServletFileUpload(diskFileItemFactory);

            try{
                List<FileItem> fileItems = servletFileUpload.parseRequest(request);
                System.out.println(pds+"fileItems :"+fileItems);

                for(FileItem fileItem : fileItems){
                    System.out.println("fieldname :"+fileItem.getFieldName());
                    System.out.println("inside for loop");
                    field = fileItem.getFieldName();
                    if(fileItem.isFormField()){
                         if(field.equals("_mname")){
                            motherName = fileItem.getString().trim();
                            System.out.println(pds+"mother name :\t\t>"+motherName+"<");

                        }else if(field.equals("code")){
                            code = fileItem.getString().trim();
                            System.out.println(pds+"code :\t\t>"+code+"<");

                            if(code.equals("1")){
                                flag = true;
                                System.out.println("ajax request recieved");
                            }
                        }

                    }else {
                        System.out.println("file for upload recieved");
                    }
                }//for loop end
            }catch(FileUploadException e){
                e.printStackTrace();
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }

无法从post ajax multipart请求获取有效负载数据，并从servletFileUpload.parseRequest请求参数（请求）

0 个答案: