JAVA submit form form background can not get parameters and garbled problem

        <form class="form-horizontal m-t" id="commentForm" method="post" enctype="multipart/form-data">

            <div class="form-group">
                <label class="col-sm-2 control-label" style="float:left;"><font>标题：</font></label>
                <div class="col-sm-6">
                    <input id="newsTitle" name="newsTitle" minlength="2" type="text" class="form-control" required="" aria-required="true" value="">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" style="float:left;"><font>关键词：</font></label>
                <div class="col-sm-6">
                    <input id="keywords" name="keywords" minlength="2" type="text" class="form-control" required="" aria-required="true" value="">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" style="float:left;"><font>描述：</font></label>
                <div class="col-sm-6">
                    <input id="description" name="description" minlength="2" type="text" class="form-control" required="" aria-required="true" value="">
                </div>
            </div>
            <div class="form-group">
                <label class="col-sm-2 control-label" style="float:left;"><font>详细：</font></label>
                <div class="col-sm-6">
                    <textarea id="newsContent" name="newsContent" minlength="2" rows="4" type="text" class="form-control"></textarea>
                    <script type="text/javascript">CKEDITOR.replace('newsContent')</script>
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-6 col-sm-offset-2">
                    <button class="btn btn-primary" type="submit" onclick="return btnsubmit()">提交</button>
                    <button class="btn btn-danger" type="button" id="cancel">取消</button>
                </div>
            </div>
        </form>

This is my form submission code. Of course, in the submitting hand, I use js to change the function. The key point is that I ca n’t get the parameters after I enter the controller. I use the parameters directly obtained by the object in the background.

    @RequestMapping(value="/AddorEdit",produces = {"application/text;charset=UTF-8"})
    public String AddorEdit(NewsManager model,HttpServletRequest request)throws ServletException, IOException
    {
        request.setCharacterEncoding("UTF-8");
        String userName = request.getParameter("newsTitle");
        var user = ManageProvider.getProvider().Current(request);
        if (user==null||user.getId()==0)
        {
            return "login/login";
        }
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        java.util.Date time=null;
        try {
            time= df.parse(df.format(new Date()));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        model.setCreateDate(time);
        model.setCreateName(user.getUserName());
        model.setState(1);
        ApplicationContext ctx = new ClassPathXmlApplicationContext(
                "file:D:/Program Files/JetBrains/javaproject08/web/WEB-INF/applicationContext.xml");
        NewsManagerServiceImpl newsmanagerserviceimpl=(NewsManagerServiceImpl)ctx.getBean("newsManagerservice");
        newsmanagerserviceimpl.insertNewsManager(model);
        return "news/newsindex";
    }

Solution: There is one more in the front page code

enctype = "multipart / form-data" This attribute can be removed, 
then the parameters passed are garbled

 

 

 

 I add in controller

@RequestMapping (value = "/ AddorEdit", produces = {"application / text; charset = UTF-8"}), the page also added encoding

<% @ page contentType = "text / html; charset = UTF-8" language = "java"%> 
<meta http-equiv = "Content-Type" content = "text / html; charset = utf-8" /> 
There are many others mentioned online

request.setCharacterEncoding ("UTF-8"); It is ok to add a paragraph, but it is useless in my project. 
Finally, I saw on the website that such a code was added to web.xml (recommended at the front, Mine is so good) perfectly solved

    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>