我有评论和发布系统，我希望在不使用百万美元碎片的情况下将其转换为ajax。如何做到我无法弄清楚每次发帖或评论时我都不想刷新页面。
控制器：
@Controller
public class DashboardController {
private Post post;
private User user;
@Autowired
private PostRepository postRepository;
@Autowired
private UserRepository userRepository;
@Autowired
CommentRepository commentRepository;
@RequestMapping(value = "/dashboard", method = RequestMethod.GET)
public String returnPosts(Model model) {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String currentPrincipalName = authentication.getName(); //holding login user details
model.addAttribute("firstName", userRepository.findByEmail(currentPrincipalName).getFirstName());
model.addAttribute("newPost", new Post());
model.addAttribute("newComment", new Comment());
model.addAttribute("posts", postRepository.findAllByOrderByDateDesc());
model.addAttribute("comments", commentRepository.findAll());
return "main";
}
@RequestMapping(value = "/dashboard/posts", method = RequestMethod.POST)
public String addPost(Model model, @ModelAttribute Post post, @ModelAttribute User user) {
model.addAttribute("newPost", post);
creatPost(post);
System.out.println(post.getId());
return "redirect:/dashboard";
}
@RequestMapping(value = "/dashboard/comments", method = RequestMethod.POST)
public String addComment( Model model, @ModelAttribute Comment comment,
@ModelAttribute User user) {
model.addAttribute("newComment", comment);
// model.addAttribute("posts", post);
creatComment(comment.getPostId(), comment);
System.out.println(comment.toString());
//System.out.println(post.getId());
// System.out.println(comment.getPostId());
return "redirect:/dashboard";
}
private Comment creatComment(String id, Comment comment) {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String currentPrincipalName = authentication.getName();
comment.setDate(new Date());
comment.setAuthor(userRepository.findByEmail(currentPrincipalName).getFirstName()
+ " " + userRepository.findByEmail(currentPrincipalName).getLastName());
comment.setPostId(id);
return commentRepository.save(comment);
}
private Post creatPost(Post post) {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String currentPrincipalName = authentication.getName(); //holding login user details
post.setAuthor(userRepository.findByEmail(currentPrincipalName).getFirstName()
+ " " + userRepository.findByEmail(currentPrincipalName).getLastName());
post.setDate(new Date());
return postRepository.save(post);
}
}
Thymeleaf形式：
<div id="content" class="yellow col-xs-12">
<form class="col-xs-12" role="form" action="/dashboard/posts"
th:action="@{/dashboard/posts}" th:object="${newPost}" method="post">
<div class="form-group col-xs-12">
<textarea class="form col-xs-6" rows="2" id="full" placeholder="share anything....."
th:field="*{content}" style="font-size: 20px;" required="required"></textarea>
<div class="menu1 col-xs-12">
<hr/>
<ul class="text-center col-xs-12">
<a href="#">
<li>
<button type="submit" class="sendpost btn btn-success">Send</button>
</li>
<li class="xs-12 "><i class="fa fa-flash fa-lg"></i>Tasks</li>
<li class="xs-12"><i class="fa fa-paperclip fa-lg"></i>files</li>
<li class="xs-12"><i class="fa fa-calendar fa-lg"></i> calendar</li>
<li class="xs-12"><i class="fa fa-search fa-lg"></i>stying</li>
</a>
</ul>
</div>
</div>
</form>
<div>
<div th:each="post : ${posts}" style="border:2px solid #CCCCCC ; margin-bottom: 50px" id="post-div"
class="post-group col-xs-12">
<div class="imag col-xs-2">
<!--<input type="hidden" th:field="*{post.id}" disabled="disabled"/>-->
<img style="width: 50px;" src="images/1.png" class="img-circle img-responsive" alt=""/>
</div>
<div class=" col-xs-10">
<h4 style="line-height: .4;"><p class="name" th:text="*{post.author}">
</p>
<small style="color: #337ab7" th:text="*{post.date}"></small>
</h4>
<br/>
<p style="font-size: 20px" id="post-p" class="desc" th:text="*{post.content}"></p><br/>
<div class="footer ignore-zoom">
<a class="comment" onclick="showDiv1()"><i class="aa fa fa-comment"></i>
<span class="lin">0</span></a>
<a onclick="showDiv2()" href="#">
<i id="like" class="aa fa fa-heart active"></i>
<span style="display:none;" id="like-1" class="lin">1</span></a>
<a class="aa dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false"><i
class="fa fa-pencil"></i> </a>
</div>
<div th:each="comment : ${comments}" id="my-comment">
<div th:if="${post.id == comment.postId}">
<hr/>
<br/>
<img class="img-circle img-responsive" src="images/1.png"
style="margin-right:5%; width: 50px; display: inline-flex; color:#080602;"/>
<div style="line-height:.8">
<label th:text="*{comment.author}"> </label><br/>
<small th:text="*{comment.date}" style=" color: #337ab7 ; margin-left:16%;">time of
comment
</small>
</div>
<br/>
<p style="font-size: 16px;" id="-comment" th:text="*{comment.comment}"></p>
<div class="footer footer1 ignore-zoom">
<a onclick="showDiv4()" href="#">
<i id="like1" class="aa fa fa-heart active"></i>
<span style="display:none;" id="like-2" class="lin">1</span></a>
<a class="aa dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false"><i
class="fa fa-pencil"></i> </a>
</div>
</div>
</div>
<form role="form" action="/dashboard/comments"
th:action="@{/dashboard/comments}" th:object="${newComment}" method="post">
<input type="hidden" name="postId" th:value="${post.id}"/>
<div id="comment-div" class="form-group col-xs-12">
<textarea th:field="*{comment}" class="form col-xs-6" rows="2" id="full2"
placeholder="Your Comment....." required="required"></textarea>
<div class="menu1 col-xs-12">
<hr/>
<ul class="text-center col-xs-12">
<a href="#">
<li onclick="showDiv()">
<button type="submit" class="btn btn-info">Send</button>
</li>
<li class="xs-12 "><i class="fa fa-flash fa-lg"></i></li>
<li class="xs-12"><i class="fa fa-paperclip fa-lg"></i></li>
<li class="xs-12"><i class="fa fa-calendar fa-lg"></i></li>
<li class="xs-12"><i class="fa fa-search fa-lg"></i></li>
</a>
</ul>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
答案 0 :(得分：0)
您可以查看教程http://www.thymeleaf.org/doc/tutorials/2.1/thymeleafspring.html#ajax-fragments
内容如下： Ajax片段 WebFlow允许通过带有标记的AJAX呈现片段的规范，如下所示：
<view-state id="detail" view="bookingDetail">
<transition on="updateData">
<render fragments="hoteldata"/>
</transition>
</view-state>
这些片段（在本例中为hoteldata）可以是以逗号分隔的片段列表，其中包含th：fragment：
<div id="data" th:fragment="hoteldata">
This is a content to be changed
</div>
始终记住指定的片段必须具有id属性，以便在浏览器上运行的Spring JavaScript库能够替换标记。
标签也可以使用DOM选择器指定：
<view-state id="detail" view="bookingDetail">
<transition on="updateData">
<render fragments="[//div[@id='data']]"/>
</transition>
</view-state>
...这意味着不需要片段：
<div id="data">
This is a content to be changed
</div>
对于触发updateData转换的代码，它看起来像：
<script type="text/javascript" th:src="@{/resources/dojo/dojo.js}"></script>
<script type="text/javascript" th:src="@{/resources/spring/Spring.js}"></script>
<script type="text/javascript" th:src="@{/resources/spring/Spring-Dojo.js}"></script>
...
<form id="triggerform" method="post" action="">
<input type="submit" id="doUpdate" name="_eventId_updateData" value="Update now!" />
</form>
<script type="text/javascript">
Spring.addDecoration(
new Spring.AjaxEventDecoration({formId:'triggerform',elementId:'doUpdate',event:'onclick'}));
</script>