xutils

npm install @ohos/xutils --save

  import { HttpUtils } from '@ohos/xutils/'
  import { HttpMethod } from '@ohos/xutils/'
  import { RequestCallBack } from '@ohos/xutils/'
  import { RequestParams } from '@ohos/xutils/'
  import { ResponseInfo } from '@ohos/xutils/'
  import { DbUtils } from '@ohos/xutils/'
  import { DaoConfig } from '@ohos/xutils/'
  import { QueryCallBack } from '@ohos/xutils/'
  import { Selector } from '@ohos/xutils/'
  import { BitmapUtils } from '@ohos/xutils/'
  import { BitmapLoadCallBack } from '@ohos/xutils/'

  //添加Header
  @State requestParams: RequestParams = new RequestParams();
  this.requestParams.addHeader("Content-Type", "application/json");
  //添加传递参数
  this.requestParams.addQueryStringParameter("key", "397c9db4cb0621ad0313123dab416668");
  this.requestParams.addQueryStringParameter("city", "北京");
  //GET请求
  new HttpUtils().send(HttpMethod.GET,
           "http://apis.juhe.cn/simpleWeather/query?key=397c9db4cb0621ad0313123dab416668&city=北京",
           new HttpCallBack())
  //POST请求
  new HttpUtils().sendParams(HttpMethod.POST,
           "http://apis.juhe.cn/simpleWeather/query",
           this.requestParams,
           new HttpCallBack())

new HttpUtils().download('https://count.liqucn.com/d.php?id=725672&urlos=android&from_type=web',
           'xUtils/hsh.apk', null)

//创建数据库
this.db = DbUtils.create(this.config);
//创建表
this.config.setDbName(this.dbName)
this.config.setTableName(this.tableName)
this.config.setCreateTableSql("ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT NOT NULL, AGE INTEGER, SALARY REAL, CODES BLOB")
this.db.createTableIfNotExist();
//插入数据
const valueBucket = {
           "NAME": "Lisa",
           "AGE": 18,
           "SALARY": 100.5,
           // @ts-ignore
           "CODES": new Uint8Array([1, 2, 3, 4, 5]),
         };
this.db.save(valueBucket)
//查询数据
this.db.findAll(Selector.from(this.tableName, this.queryColumns), new DbCallBack());
this.db.findAll(Selector.from(this.tableName, this.queryColumns)
           .where("NAME", "equalTo", "Lisa").and("AGE", "equalTo", 18), new DbCallBack());
this.db.findFirst(Selector.from(this.tableName, this.queryColumns)
           .where("NAME", "equalTo", "Rose"), new DbCallBack());
//更新数据
this.db.update(valueBucket, Selector.from(this.tableName, this.queryColumns)
           .where("NAME", "equalTo", "Rose"));
//删除数据
this.db.delete(Selector.from(this.tableName, this.queryColumns)
           .where("NAME", "equalTo", "Rose"));
//删除数据库
this.db.dropDb();

|---- xutils
      |---- entry  # 示例代码文件夹
         |----entity
         |----pages
      |---- xutils  # xutils库文件夹
         |----src
            |----main
               |----ets
                      |---- bitmap  # 图片操作实现
                      |---- cache  # 缓存实现
                      |---- db  # 数据库操作实现
                      |---- http  # 网络请求操作实现
                      |---- task  # 任务实现
                      |---- ts-md5  # 加密实现
                      |---- util  # 工具类实现
                      |---- BitmapUtils.ets  # 图片缓存对外类
                      |---- DbUtils.ets  # 数据库操作对外类
                      |---- HttpUtils.ets  # 网络请求操作对外类
                      |---- index.ets  # 对外接口
      |---- README.md  # 安装使用方法