Question

我正在尝试从视图向控制器发送字符串和图像，但是我不断收到此错误：

字符串参数'text'不存在

我尝试了一些在网上找到的解决方案，但没有一个解决了我的问题。

 @RequestMapping(value = "/post-create", method = RequestMethod.POST)
        @ResponseBody
        public String[][] createPost(@RequestParam(value="text" ) String text,
                                 @RequestParam(value = "photo") MultipartFile body) throws IOException {
            User user = (User) SecurityContextHolder.getContext().getAuthentication().getPrincipal();
            String username = user.getUsername();
            com.project.agro.entities.User user1 = userService.getUserByUsername(username);

            Image image = new Image(body.getBytes());
            imageService.addImage(image);
            Post post = new Post();
            post.setAuthor(user1);
            post.setText(text);
            post.setImage(image);
            postService.addPost(post);

            post = postService.addPost(post);
            List<Post> posts = new ArrayList<>();
            posts.add(post);

            return utilsService.arrayFill(posts, user1);
        }

jQuery

 $("#create-post-button").click(function (e) {
        e.preventDefault();
        var form = $('form')[0];
        var formData = new FormData(form);
        $.ajax({
            url: '/post-create',
            data: formData,
            type: 'POST',
            contentType: false,
            processData: false,
            success: function (data) {
                $("#posts-container").prepend(concatPost(data[0]));
                $("#special-alert").remove();
                $("#posts-container").append('' + special_alert_no_more_posts);
                document.getElementById('create-post-form').reset();
                $("#characters-number").text(5000);
                from += 1;
                $("#create-post-button").prop("disabled", true);
            }
        })

    });

HTML

<div id="create-post-box" class="row">
  <hr class=\ "middle\">
  <a id="create-post-box-href"><span id="arrow-down"
                            class="fa fa-angle-down"></span><span id="arrow-up"
                            class="fa fa-angle-up hidden"></span></a>
  <div id="create-post-form-div" class="hidden">
    <form enctype="multipart/form-data" id="create-post-form" method="POST">
      <div class="form-group">
        <div class="col-sm-12">
          <textarea class="form-control" maxlength="5000" rows="5" id="post-text" name="text"></textarea>
          <div id="counter">
            <p id="counter-line">
              <span id="characters-number">5000</span> symbols left.
            </p>
          </div>
        </div>
      </div>
      <div class="form-group">
        <div class="col-sm-12">
          <div class="input-group">
            <label class="input-group-btn"> <span class="btn btn-primary"><span class="glyphicon glyphicon-picture"></span><input id="file" type="file" style="display: none;" name="photo" accept="image/x-png,image/gif,image/jpeg" multiple>
   </span>
   </label> <input type="text" class="form-control" readonly>
          </div>
        </div>
      </div>
      <div class="form-group">
        <div class="col-sm-12">
          <button type="button" id="create-post-button" class="btn btn-primary btn-md btn-block">Post it</button>
        </div>
      </div>
    </form>
  </div>

我尝试了

@RequestParam(value="text" ,required=false)

但随后显示：

字符串参数'photo'在Multipart中不存在缺少ServletException

Answer 1

尝试使用@RequestBody MultipartFile body代替@RequestParam(value = "photo") MultipartFile body

org.springframework.web.bind.MissingServletRequestParameterException：必需的字符串参数“ text”不存在

1 个答案: