Question

所以我有这个函数将文档发送到一个servlet，它将它存储在我的数据库中，一切正常：

function submitAttachment(formName, formId, fieldName) {
      var formData = new FormData();
      var fileName = "";
      var files = document.getElementById(fieldName + "Document").files;

      formData.append('formName', formName);
      formData.append('formId', formId);
      formData.append('fieldName', fieldName);

      for (var i = 0; i < files.length; i++) {
          var file = files[i];
          formData.append('file', file, file.name);
          fileName = file.name;
      }

      var xhr = new XMLHttpRequest();
      xhr.open('POST', 'saveattachment', true);

      xhr.onload = function() {
          if (xhr.status === 200) { // Success
            var idDoc = xhr.responseText;
            setLinkHtml(fieldName, fileName, idDoc);
            $("#" + fieldName + "IdDocument").val(idDoc);
          }
      };

      xhr.send(formData);
}

只是，我得到的答案（来自xhr.responseText）是\ u0017。

我的servlet看起来大致如下：

public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
        response.setContentType("text/html; charset=UTF-8");
       response.setCharacterEncoding("UTF-8");
       request.setCharacterEncoding("UTF-8");
       PrintWriter out = response.getWriter();

        //DoStuff

        out.write(doc.getIdDocument());
    }


    //Process the HTTP Post request
    public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
        doGet(request,response);
    }

我想要的只是返回一个号码，我做错了什么？

Answer 1

终于找到了！如果有人想知道，结果返回一个数字作为某种返回代码。所以我需要做的就是添加+＆＃34;＆＃34; 所以out.write(doc.getIdDocument() + "")并且它有效！

如何设置XMLHttpRequest的响应

1 个答案: