{ "code": 200, "msg": "操作成功", "data": { "id": 1, "tplName": "参数录入表单模板", "tplCode": "paramsTpl", "tplContent": "[{\"modelName\":\"蒸汽参数\",\"modelCode\":\"stream\",\"modelTitleColor\":\"#006FFF\",\"modelTitleIcon\":\"../images/zq.png\",\"moduleList\":[{\"label\":\"蒸汽流量\",\"unit\":\"t/h\",\"value\":\"\",\"placeholder\":\"请输入蒸汽流量\",\"type\":\"input\",\"code\":\"Ded\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"蒸汽温度\",\"unit\":\"℃\",\"value\":\"\",\"placeholder\":\"请输入蒸汽温度\",\"type\":\"input\",\"code\":\"Ted\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"蒸汽压力\",\"unit\":\"Mpa\",\"value\":\"\",\"placeholder\":\"请输入蒸汽压力\",\"type\":\"input\",\"code\":\"Ped\",\"options\":\"\",\"inputType\":\"number\"}]},{\"modelName\":\"水参数\",\"modelCode\":\"stream1\",\"modelTitleColor\":\"#3AB589\",\"modelTitleIcon\":\"../images/water.png\",\"moduleList\":[{\"label\":\"给水温度\",\"unit\":\"℃\",\"value\":\"\",\"placeholder\":\"请输入给水温度\",\"type\":\"input\",\"code\":\"Tgs\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"给水压力\",\"unit\":\"Mpa\",\"value\":\"\",\"placeholder\":\"请输入给水压力\",\"type\":\"input\",\"code\":\"Pgs\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"冷凝水回收量\",\"unit\":\"t/h\",\"value\":\"\",\"placeholder\":\"请输入冷凝水回收量\",\"type\":\"input\",\"code\":\"D_ed\",\"options\":\"\",\"inputType\":\"number\"}]},{\"modelName\":\"供汽参数\",\"modelCode\":\"stream2\",\"modelTitleColor\":\"#EA8432\",\"modelTitleIcon\":\"../images/gq.png\",\"moduleList\":[{\"label\":\"供汽时长\",\"unit\":\"h/d\",\"value\":\"\",\"placeholder\":\"请输入供汽时长\",\"type\":\"input\",\"code\":\"Hed\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"日供汽量\",\"unit\":\"t/d\",\"value\":\"\",\"placeholder\":\"请输入日供汽量\",\"type\":\"input\",\"code\":\"Sed\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"年工作时间\",\"unit\":\"d/y\",\"value\":\"\",\"placeholder\":\"请输入年工作时间\",\"type\":\"input\",\"code\":\"Day\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"年供汽量\",\"unit\":\"t/y\",\"value\":\"\",\"placeholder\":\"请输入年供汽量\",\"type\":\"input\",\"code\":\"S_ed\",\"options\":\"\",\"inputType\":\"number\"}]},{\"modelName\":\"电价参数\",\"modelCode\":\"stream3\",\"modelTitleColor\":\"#42B51A\",\"modelTitleIcon\":\"../images/dj.png\",\"moduleList\":[{\"label\":\"天然气单价\",\"unit\":\"元/m³\",\"value\":\"\",\"placeholder\":\"请输入天然气单价\",\"type\":\"input\",\"code\":\"Vng\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"谷电价格\",\"unit\":\"元/kWh\",\"value\":\"\",\"placeholder\":\"请输入谷电价格\",\"type\":\"input\",\"code\":\"Vve\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"谷电时长\",\"unit\":\"h\",\"value\":\"\",\"placeholder\":\"请输入谷电时长\",\"type\":\"input\",\"code\":\"Hrv\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"平电价格\",\"unit\":\"元/kWh\",\"value\":\"\",\"placeholder\":\"请输入平电价格\",\"type\":\"input\",\"code\":\"Vhe\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"平电时长\",\"unit\":\"h\",\"value\":\"\",\"placeholder\":\"请输入平电时长\",\"type\":\"input\",\"code\":\"Hhe\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"峰电价格\",\"unit\":\"元/kWh\",\"value\":\"\",\"placeholder\":\"请输入峰电价格\",\"type\":\"input\",\"code\":\"Vpe\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"峰电时长\",\"unit\":\"h\",\"value\":\"\",\"placeholder\":\"请输入峰电时长\",\"type\":\"input\",\"code\":\"Hpe\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"是否需要增容\",\"unit\":\"\",\"value\":\"\",\"placeholder\":\"\",\"type\":\"select\",\"code\":\"add_capacity\",\"options\":[{\"name\":\"是\",\"value\":\"1\"},{\"name\":\"否\",\"value\":\"0\"}],\"inputType\":\"\",\"relationship\":{\"relationshipValue\":\"0\",\"relationshipField\":\"item\",\"relationshipSource\":[{\"parentCode\":\"storage\",\"selfCode\":[\"LCC_se10\",\"LCC_se20\"]},{\"parentCode\":\"magnesiaBrik\",\"selfCode\":[\"LCC_mb10\",\"LCC_mb20\"]},{\"parentCode\":\"siact\",\"selfCode\":[\"ICC\",\"LCC_10\",\"LCC_20\"]}]}},{\"label\":\"容量电费\",\"unit\":\"元/kVA\",\"value\":\"\",\"placeholder\":\"请输入容量电费\",\"type\":\"input\",\"code\":\"Vcc\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"需量电费\",\"unit\":\"元/kVA\",\"value\":\"\",\"placeholder\":\"请输入需量电费\",\"type\":\"input\",\"code\":\"Vdc\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"水价格\",\"unit\":\"元/t\",\"value\":\"\",\"placeholder\":\"请输入水价格\",\"type\":\"input\",\"code\":\"Ved\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"蒸汽售出价格\",\"unit\":\"元/t\",\"value\":\"\",\"placeholder\":\"请输入蒸汽售出价格\",\"type\":\"input\",\"code\":\"Vst\",\"options\":\"\",\"inputType\":\"number\"}]},{\"modelName\":\"热参数\",\"modelCode\":\"stream4\",\"modelTitleColor\":\"#EA8432\",\"modelTitleIcon\":\"../images/hot.png\",\"moduleList\":[{\"label\":\"储热时长\",\"unit\":\"h\",\"value\":\"\",\"placeholder\":\"请输入储热时长\",\"type\":\"input\",\"code\":\"Htc\",\"options\":\"\",\"inputType\":\"number\"},{\"label\":\"放热时长\",\"unit\":\"h\",\"value\":\"\",\"placeholder\":\"请输入放热时长\",\"type\":\"input\",\"code\":\"Htd\",\"options\":\"\",\"inputType\":\"number\"}]}]", "tplType": null, "tplDescribe": "参数录入表单模板", "createTime": null } } 使用flutter进行转换为实体类
时间: 2025-05-27 13:55:43 浏览: 22
<think>嗯,用户想在Flutter中将复杂的JSON数据转换成实体类。我记得Flutter不支持运行时反射,所以不能用GSON之类的库。之前有几种方法,比如手动编写、用json_serializable库或者插件。用户提到的是复杂JSON,可能需要处理嵌套结构或者特殊字段名。手动写的话容易出错,特别是数据结构复杂的时候。所以应该推荐自动生成的方法,比如json_serializable或者插件工具。
根据引用[3],json-to-dart插件可能更方便,直接从URL或JSON生成代码,适合复杂结构。不过json_serializable更灵活,可以处理重命名和自定义类型,比如引用[4]提到的@JsonKey注解。需要分步骤说明,先安装依赖,然后创建模型类,运行生成命令。可能用户还不太清楚具体步骤,要详细说明每个步骤,比如添加依赖到pubspec.yaml,创建类时使用注解,运行build_runner生成代码。还要提醒命名规范和如何处理嵌套对象,可能需要创建多个实体类。还要考虑用户可能遇到的问题,比如如何处理数组中的对象,或者日期格式的转换。引用[4]中的例子可以说明如何用注解重命名字段,确保符合命名规范。最后给出示例,让用户更直观地看到生成后的代码结构。</think>在Flutter中根据复杂JSON生成实体类可以通过以下三种主流方案实现:
### 一、手动序列化方案
1. 创建实体类时需严格遵循JSON结构
2. 实现`fromJson`和`toJson`方法
3. 处理嵌套对象时需要递归转换
```dart
class User {
final String name;
final Address address;
User({required this.name, required this.address});
factory User.fromJson(Map<String, dynamic> json) {
return User(
name: json['user_name'],
address: Address.fromJson(json['user_address'])
);
}
}
```
适用于简单结构,但维护成本高,容易出错[^1]
### 二、json_serializable方案(推荐)
1. 添加依赖:
```yaml
dependencies:
json_annotation: ^4.8.1
dev_dependencies:
build_runner: ^2.4.5
json_serializable: ^6.7.1
```
2. 创建模型类:
```dart
@JsonSerializable()
class Product {
@JsonKey(name: 'product_id')
final String id;
final List<Category> categories;
Product(this.id, this.categories);
factory Product.fromJson(Map<String, dynamic> json) => _$ProductFromJson(json);
Map<String, dynamic> toJson() => _$ProductToJson(this);
}
```
3. 运行生成命令:
```bash
flutter pub run build_runner build
```
自动生成序列化代码,支持复杂结构处理[^3]
### 三、自动化工具方案
1. 使用Android Studio的`JSON To Dart`插件:
- 安装插件后右键新建Dart类
- 直接粘贴JSON自动生成模型
2. 在线工具如`QuickType`:
- 支持设置空安全、生成方法选项
- 可处理多层嵌套和数组结构
### 最佳实践建议:
1. 对于深层嵌套JSON,建议分层生成多个实体类
2. 使用`@JsonKey`处理特殊字段:
```dart
@JsonKey(
name: 'create_time',
fromJson: _dateFromJson,
toJson: _dateToJson
)
final DateTime createTime;
```
3. 数组类型需明确泛型类型:
```dart
List<OrderItem> get items => List<OrderItem>.from(json['items']);
```
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