Thymeleaf在前台下拉列表获取后台传的值

                                                                                                                     Thymeleaf在前台下拉列表获取后台传的值

后台添加代码：

/**
     * 新增机构
     */
    @GetMapping("/add")
    public String add(ModelMap mmap)
    {
        List<Scholar>  scholars = scholarService.selectScholarListName();
        mmap.put("scholars",scholars);
        return "module/institution/add";
    }
    

后台修改代码：

/**
     * 修改机构
     */
    @GetMapping("/edit/{id}")
    public String edit(@PathVariable("id") String id, ModelMap mmap)
    {
        Institution institution = institutionService.selectInstitutionById(id);
        List<Scholar>  scholars = scholarService.selectScholarListName();
        mmap.put("scholars",scholars);
        mmap.put("institution", institution);
        return  "module/institution/edit";
    }

前台代码添加：

<div class="form-group">    
                <label class="col-sm-3 control-label">主要研究人员：</label>
                <div class="col-sm-8" >
                    <!--<input id="majorResearcher" name="majorResearcher" class="form-control" type="hidden">-->
                        <!--<select name="title"  id="title" class="form-control m-b">
                            <option th:each="scholars : ${scholars.title}" th:text="${scholars.title}" th:value="${scholars.title}" ></option>
                        </select>-->
                    <select class="form-control" name="majorResearcher">
                        <option value="">  --  主要研究人员 --  </option>
                        <option th:each="scholars:${scholars}" th:value="${scholars.title}" th:text="${scholars.title}"></option>
                    </select>

                </div>
            </div>

前台代码回显：

<div class="form-group">    
                <label class="col-sm-3 control-label">主要研究人员：</label>
                <div class="col-sm-8">
                   <!-- <input id="majorResearcher" name="majorResearcher" th:field="*{majorResearcher}" class="form-control" type="text" >-->
                    <select class="form-control" name="majorResearcher">
                        <option  value="">  --  主要研究人员 --  </option>
                        <option th:each="scholars:${scholars}" th:value="${scholars.title}" th:text="${scholars.title}" th:field="*{majorResearcher}"></option>
                    </select>
                </div>
            </div>

前台页面添加效果：

前台页面回显效果：


前台页面的效果：