后端

@GetMapping(value = "/updateMovie/{ids}")
    @ResponseBody
    public void updateMovie(@PathVariable("ids") Integer id,HttpServletRequest request,HttpServletResponse response) throws IOException {

        Movie movie = moviesService.getMovieByMovieId(id);
        HttpSession session = request.getSession();

        String s = JSON.toJSONString(movie);
        session.setAttribute("movie",s);

        response.sendRedirect("/update.jsp");

    }

触发条件，请求updateMovie函数返回json

 else if(obj.event === 'edit'){
                //信息修改
                layer.open({
                    type: 2,
                    title:"修改电影",
                    area:['80%','80%'],
                    content: 'http://localhost:8080/updateMovie/'+data.m_id
                });
            }

前端 通过lay-filter 触发js取渲染表单

<form class="layui-form" lay-filter="test" action="" >
    <div class="layui-form-item">
        <label class="layui-form-label">预算</label>
        <div class="layui-input-block">
            <input type="text" name="budget" required="required"  lay-verify="required|number" placeholder="请输入预算" autocomplete="off" class="layui-input">
        </div>
    </div>
    <div class="layui-form-item">
        <label class="layui-form-label">电影类型</label>
        <div class="layui-input-block">
            <input type="text" name="genres" required="required" placeholder="请输入电影类型,类型用 | 隔开" autocomplete="off" class="layui-input">
        </div>
    </div>

    <div class="layui-form-item">
        <label class="layui-form-label">电影主页</label>
        <div class="layui-input-block">
            <input type="text" name="homepage"  placeholder="请输入电影主页" autocomplete="off" class="layui-input">
        </div>
    </div>


    <div class="layui-form-item">
        <label class="layui-form-label">Imdb_id</label>
        <div class="layui-input-block">
            <input type="text" name="imdb_id" required  lay-verify="required|number"  placeholder="请输入imdb编码" autocomplete="off" class="layui-input">
        </div>
    </div>


//Demo
    layui.use(['form','laydate','table'], function(){
        var form = layui.form;
        var laydate = layui.laydate;
        var $ =layui.$
        laydate.render({
            elem:'[name="release_date"]'
        });
        var obj= <%=session.getAttribute("movie")%>;
        alert(obj['genres']);
        alert(obj.genres);
        //设置表单默认值
        form.val("test", { //formTest 即 class="layui-form" 所在元素属性 lay-filter="" 对应的值
            "budget":obj.budget,
            "genres":obj.genres,
            "homepage":obj.homepage,
            "imdb_id":obj.imdb_id,
            "original_language":obj.original_language,
            "overview":obj.overview,
            "production_companies":obj.production_companies,
            "release_date":obj.release_date,
            "spoken_languages":obj.spoken_languages,
            "tagline":obj.tagline,
            "title":obj.title,
            "image_path":obj.image_path
        });
        form.render();