HarmonyOS鸿蒙Next中Router页面复杂对象如何传参

可以传，但建议传 纯数据对象 DTO，不要直接依赖实体类里的方法。Router 参数本质适合传可序列化数据：string、number、boolean、数组、普通对象。自定义类可以传字段，但对象里的方法不要传，二级页面需要方法时重新组装实体类。

示例代码：

一级页面：pages/Index.ets

import router from '@ohos.router';

class GoodsDto {
  id: string = '';
  name: string = '';
  price: number = 0;

  constructor(id: string, name: string, price: number) {
    this.id = id;
    this.name = name;
    this.price = price;
  }
}

class DetailParams {
  title: string = '';
  goodsList: GoodsDto[] = [];
  selectedGoods: GoodsDto = new GoodsDto('', '', 0);
}

@Entry
@Component
struct Index {
  private goodsList: GoodsDto[] = [
    new GoodsDto('1001', '手机', 3999),
    new GoodsDto('1002', '耳机', 699)
  ];

  private jumpToDetail(): void {
    let params = new DetailParams();
    params.title = '商品详情';
    params.goodsList = this.goodsList;
    params.selectedGoods = this.goodsList[0];

    router.pushUrl({
      url: 'pages/Detail',
      params: params
    });
  }

  build() {
    Column() {
      Button('跳转详情页')
        .onClick(() => {
          this.jumpToDetail();
        })
    }
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Center)
  }
}

二级页面：pages/Detail.ets

import router from '@ohos.router';

class GoodsDto {
  id: string = '';
  name: string = '';
  price: number = 0;
}

class DetailParams {
  title: string = '';
  goodsList: GoodsDto[] = [];
  selectedGoods: GoodsDto = new GoodsDto();
}

@Entry
@Component
struct Detail {
  @State title: string = '';
  @State goodsName: string = '';
  @State count: number = 0;

  aboutToAppear(): void {
    let params = router.getParams() as DetailParams;

    this.title = params.title;
    this.goodsName = params.selectedGoods.name;
    this.count = params.goodsList.length;
  }

  build() {
    Column({ space: 12 }) {
      Text(this.title)
        .fontSize(20)

      Text(`选中商品：${this.goodsName}`)
        .fontSize(16)

      Text(`商品数量：${this.count}`)
        .fontSize(16)

      Button('返回')
        .onClick(() => {
          router.back();
        })
    }
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Center)
  }
}

注意点：

// 不建议传带方法的实体类
class Goods {
  id: string = '';
  name: string = '';

  getDisplayName(): string {
    return this.name;
  }
}

如果二级页面需要 getDisplayName() 这类方法，建议只传 DTO 数据，到二级页面后重新构造业务实体。

大对象、图片二进制、超大数组不要直接走 Router 参数。更稳的做法是传 id，详情页再从缓存、数据库、AppStorage 或接口里取完整数据。