springboot(thymeleaf)中th:field和th:value的区别及说明

<form class="form form-horizontal" id="form-admin-add" action="#" th:action="@{/brand/updatebyid}" th:object="${brand}">

<form class="form form-horizontal" id="form-admin-add" action="#" th:action="@{/brand/updatebyid}" th:object="${brand}">
   <input type="text" class="input-text" value="" th:value="*{id}" name="id" />
   <input type="text" class="input-text"  value="" th:field="*[code]" placeholder="" id="code"/>

<tr class="text-c" th:each="order:${pageInfo.list}">
     <td th:text="${order.id}"></td>
     <td th:text="${order.dicMethodDescription}"></td>
     <td th:text="${order.productBrandName}"></td>
     <td th:text="${order.productModelName}"></td>

<td th:if="${order.productStateName}==部分退款" th:text="交易成功" class="validate"></td>
<td th:unless="${order.productStateName}==部分退款" th:text="${order.productStateName}"></td>

//static页面层：
<a title="编辑信息" href="javascript:;" rel="external nofollow"  th:οnclick="'javascript:brand_edit(\'编辑品牌信息\',\'/brand'+@{/updatebyid}+'/'+${brand.id}+'\',800,400)'" class="ml-5" style="text-decoration:none"><i class="Hui-iconfont">&#xe6df;</i></a>
//controller层：
    //根据品牌名更改品牌的名称和编号信息
    @RequestMapping(value = "/updatebyid/{id}")
    public String updatebyidBefore(Model model, @ModelAttribute(value = "brand") ProductBrand brand,
            @PathVariable("id") Long id) {
        // 根据ID查询用户 和对应的角色
        brand = operatebrand.selectByPrimaryKey(id);
        // 查询对应用户的角色
        model.addAttribute("brand", brand);
        return "maintenance-operate/editor-brand";
    }

List<OrderInfoForm> result = null;
result=orderMapper.selectOrdersByStatesSelective(order, new Integer[] {3,4,6,7,8});

List<OrderInfoForm> selectOrdersByStatesSelective(@Param(value="order")Order order,
    @Param(value="states")Integer[] states);

<select id="selectOrdersByStatesSelective" resultMap="AllResultMap" >
    select 
    <include refid="All_Column_List" />
    from order_list
    LEFT JOIN product_method ON product_method.`code` = order_list.purchase_method
    LEFT JOIN product_color ON product_color.`code` = order_list.color
    LEFT JOIN product_guarantee ON product_guarantee.`code` = order_list.guarantee
    LEFT JOIN product_info ON order_list.product_id = product_info.id
    LEFT JOIN product_model ON product_info.model = product_model.`code`
    LEFT JOIN product_standard ON product_info.standard = product_standard.`code`
    LEFT JOIN product_state ON product_state.`code` = order_list.order_state
    LEFT JOIN product_apperance ON product_apperance.`code` = order_list.apperance
    LEFT JOIN product_brand ON product_brand.`code` = product_info.brand
    <where>
        <if test="order.orderNum != null " >
            order_num like "%"#{order.orderNum,jdbcType=VARCHAR}"%"
        </if>
        <if test="order.operator != null " >
            and operator like "%"#{order.operator,jdbcType=VARCHAR}"%"
        </if>
        <if test="order.purchaseTime != null" >
            and purchase_time = #{order.purchaseTime,jdbcType=DATE}
        </if>
        <if test="order.orderState != null" >
            and order_state = #{order.orderState,jdbcType=VARCHAR}
        </if>
        <if test="order.serialNum != null" >
            and serial_num like "%"#{order.serialNum,jdbcType=VARCHAR}"%"
        </if>
        
        <if test="states != null and states.length >0">
            <foreach collection="states" item="state" separator="," open=" and order_state in (" close=")">
                #{state,jdbcType=BIGINT}
            </foreach>
        </if>
    </where>
  </select>