Thymeleaf （select、checkbox)数据绑定和数据回回显

第一种情况：select 数据绑定：

前端页面：

<div class="col-sm-10"> 
					<select name="type"  id="type" class="form-control"> 
						<option value=''>请数据类型</option> 
    					<option th:each="map : ${dataType}" th:text="${map.key}" th:value="${map.value}"> 
    					</option> 
					</select> 
				</div>

后台代码：

	// 跳转至新增页面 
	@RequestMapping(value = "/insertPage", method = { RequestMethod.GET }) 
	public String insertPage(Model model) { 
		Map<String, Object> map = MySQLConstant.getMySQLDataType(); 
		model.addAttribute("dataType", map); 
		return "field/add"; 
	}

第二情况：select 数据回显：

前端页面：

<div class="form-group"> 
				<label for="type" class="col-sm-2 control-label">数据类型</label> 
				<div class="col-sm-10"> 
					<select name="type"  id="type" class="form-control" th:field="*{type}"> 
						<option th:each="map:${dataType}" th:text="${map.key}" th:value="${map.value}" th:selected="${type eq map.value}"> 
    					</option> 
					</select> 
				</div> 
			</div>

后台代码：

// 跳转至更新页面 
	@RequestMapping(value = "/updatePage") 
	public String update(Model model, String sid) { 
		Column entity = service.selectByPrimaryKey(sid); 
		model.addAttribute("entity", entity); 
		Map<String, Object> map = MySQLConstant.getMySQLDataType(); 
		model.addAttribute("dataType", map); 
 
		Map<String, Object> requiredMap = new HashMap<String, Object>(); 
		requiredMap.put("否", "2"); 
		requiredMap.put("是", "1"); 
		model.addAttribute("requiredMap", requiredMap); 
 
		Map<String, Object> primaryMap = new HashMap<String, Object>(); 
		primaryMap.put("否", "2"); 
		primaryMap.put("是", "1"); 
		model.addAttribute("primaryMap", primaryMap); 
		return "field/update"; 
	}

第三种情况：checkbox 数据绑定

前端页面：

<div class="form-group"> 
				<label for="required" class="col-sm-2 control-label">是否必填</label> 
				<div class="col-sm-10"> 
					<!--   
					<input type="text" class="form-control" name="required" 
						id="required" placeholder="在此输入控件名称" />--> 
					<div class="form-control"> 
	   					<label class="checkbox-inline"> 
	      					<input type="checkbox" id="required" name="required" value="1"> 是 
	   					</label> 
	   					<label class="checkbox-inline"> 
	      					<input type="checkbox" id="required" name="required" value="2"> 否 
	  					</label> 
					</div> 
				</div> 
			</div>

第四种情况：checkbox 数据回显

前端页面：

<div class="form-group"> 
				<label for="required" class="col-sm-2 control-label">是否必填</label> 
				<div class="col-sm-10"> 
					<div class="form-control"> 
					<input type ="checkbox" name="required" th:field="*{required}" 
						th:each ="map : ${requiredMap}" 
						th:value="${map.value}" 
						th:text ="${map.key}" 
						th:attr ="checked=${map.value eq required ? true : false}"> 
					</div> 
				</div> 
			</div>

后台代码：

@RequestMapping(value = "/updatePage") 
	public String update(Model model, String sid) { 
		Column entity = service.selectByPrimaryKey(sid); 
		model.addAttribute("entity", entity); 
		Map<String, Object> map = MySQLConstant.getMySQLDataType(); 
		model.addAttribute("dataType", map); 
 
		Map<String, Object> requiredMap = new HashMap<String, Object>(); 
		requiredMap.put("否", "2"); 
		requiredMap.put("是", "1"); 
		model.addAttribute("requiredMap", requiredMap); 
 
		Map<String, Object> primaryMap = new HashMap<String, Object>(); 
		primaryMap.put("否", "2"); 
		primaryMap.put("是", "1"); 
		model.addAttribute("primaryMap", primaryMap); 
		return "field/update"; 
	}