java - 无法从Spring Controller 中的http post正文读取参数

Question

我有简单的功能:

$scope.addComment = function () {
        var url = "";
        url = "/" + contextPath + "/tickets/" + ticketId + "/comments/new";
        var data = {comment: $scope.newComment};
        $http.post(url, data)
            .then(
                function (response) {
                    var comments = response.data;
                    angular.forEach(comments, function (value, key) {
                        value.date = $filter('date')(value.date, "MMM dd, yyyy HH:mm");
                    });
                    $scope.comments = comments;
                },
                function (errResponse) {
                    console.log(errResponse.statusText);
                }
            )
    }

和 Controller :

@RequestMapping(value = "/{ticketId}/comments/new", method = RequestMethod.POST)
public ResponseEntity<List<CommentDto>> addComments(@PathVariable int ticketId,
                                                    @RequestParam(value = "comment", required = false) String text,
                                                    HttpServletRequest request,
                                                    Authentication authentication) {
    if (text == "" || text == null) {
        return new ResponseEntity<>(getTicketComments(ticketId), HttpStatus.OK);
    }
    Comment newComment = new Comment();
    User user = userService.loadUserByUsername(authentication.getName());
    newComment.setUserId(user.getId());
    newComment.setTicketId(ticketId);
    newComment.setText(text);
    commentService.save(newComment);
    return new ResponseEntity<>(getTicketComments(ticketId), HttpStatus.OK);

所以我尝试通过两种方式获取参数“Comment”:通过@RequestParam，以及从请求对象，但是@Request param始终为null，并且来自请求对象的params映射始终为空。我做错了什么？

Answer 1

如下所示更改您的 Controller -

     @RequestMapping(value = "/{ticketId}/comments/new", method = RequestMethod.POST)
        public ResponseEntity<List<CommentDto>> 
addComments(@PathVariable int ticketId,@RequestBody CommentsMapper comMapObj) 

注意 - requestBody 添加了一个映射器类来映射您的评论，现在创建一个映射器类，如下所示

class CommentsMapper{

private String comments;

//Create getters and setters

}

现在您将能够在 Controller 中通过 comMapObj.getComment() 访问您的comment 如果您有多个注释，则使用 String[] 或您在映射器中需要的任何类型。

甚至您也可以使用Comment(您的类(class))类型。