Harmony环境使用Bee入门向导

一、添加jar包

将bee相关的3个jar包复制到entry包下的libs目录，右击jar包，

选择：Add as Libray…  ,  在跳出的对话框中选择ok.

二、将相关配置注册到Bee

在启动的Ability ，添加相应的配置和注册信息。 若有自定义的配置在bee.properties则需要;则需要使 用：BeeConfigInit.init();

将上下文注册到Bee；将创建表和更新表的回调类,注册到Bee；

以后就可以直接使用Bee了。

public class UserDataAbility extends Ability {private static final String TAG = UserDataAbility.class.getSimpleName();private static final HiLogLabel LABEL_LOG = new HiLogLabel(3, 0xD000F00, TAG);@Overridepublic void onStart(Intent intent) {super.onStart(intent);BeeConfigInit.init(); //若有自定义的配置在bee.properties则需要ContextRegistry.register(this.getApplicationContext()); //将上下文注册到BeeRdbOpenCallbackRegistry.register(new MyRdbOpenCallback()); //将创建表和更新表的回调类,注册到Bee
//      BeeRdbStoreRegistry.register(rdbStore);  //直接注册rdbStore对象也可以.  但需要自己去生成,配置信息也不好管理}
}

若有自定义的配置在bee.properties，将该文件放在entry\src\main\resources\rawfile目录下。

三、定义安装app时，创建表和更新表的类

package ohos.samples.dataability;import ohos.data.rdb.RdbOpenCallback;
import ohos.data.rdb.RdbStore;
import ohos.hiviewdfx.HiLog;
import ohos.hiviewdfx.HiLogLabel;
import ohos.samples.dataability.bee.entity.*;
import ohos.samples.dataability.entity.Person;
import org.teasoft.honey.osql.autogen.Ddl;
import org.teasoft.honey.osql.core.HoneyContext;public class MyRdbOpenCallback extends RdbOpenCallback {private static final String TAG = "MyRdbOpenCallback";private static final HiLogLabel LABEL_LOG = new HiLogLabel(3, 0xD000F00, TAG);@Overridepublic void onCreate(RdbStore store) {try{//        store.executeSql(   //手动写sql
//                "create table if not exists " +  "person (user_id integer primary key autoincrement, "
//                        + "name text not null, "  + "age integer)");HiLog.info(LABEL_LOG,"--------------------创建表.......开始.");String sql= Ddl.toCreateTableSQL(new Person()); //不想写sql可以自动生成HiLog.info(LABEL_LOG, "---------------create table sql:"+sql);store.executeSql(sql);//创建表样例：store.executeSql(Ddl.toCreateTableSQL(new LeafAlloc()));store.executeSql(Ddl.toCreateTableSQL(new Orders()));store.executeSql(Ddl.toCreateTableSQL(new Tb_inaccount()));store.executeSql(Ddl.toCreateTableSQL(new Tb_outaccount()));store.executeSql(Ddl.toCreateTableSQL(new TestUser()));} catch (Exception e) {HiLog.error(LABEL_LOG, "---------------create table:"+e.getMessage());}HiLog.info(LABEL_LOG, "------------onCreate  finished!");}@Overridepublic void onUpgrade(RdbStore store, int oldVersion, int newVersion) {HoneyContext.setCurrentAppDB(store);HiLog.info(LABEL_LOG,"--------------------更新表.......");HiLog.info(LABEL_LOG, "%{public}s", "DataBase upgrade");HoneyContext.removeCurrentAppDB();}}

四，可以在其它AbilitySlice中使用Bee操作数据库了

以下是select,update,insert,delete操作的例子。

主要语句如下：

Suid suid = BF.getSuid();  //简单的select,update,insert,delete操作
suid.insert(p);
suid.delete(new Person(), condition);
suid.update(p); //根据id修改对象
list = suid.select(new Person());

//BF是BeeFactoryHelper的简称,也可以如下用法:
//Suid suid=BeeFactoryHelper.getSuid();

详细代码如下：

    private void insert(Component component) {HiLog.info(LABEL_LOG, "----------------insert");try {Person p = new Person();p.setName(getRandomName());p.setAge(getRandomAge());suid.insert(p);HiLog.info(LABEL_LOG, "----------------insert结束.");} catch (Exception e) {HiLog.error(LABEL_LOG, "--------------insert--:" + e.getMessage());}query(true);}private void delete(Component component) {HiLog.info(LABEL_LOG, "----------------delete");try {Condition condition = BF.getCondition();condition.between("userId", 1, 2);suid.delete(new Person(), condition);} catch (Exception e) {HiLog.error(LABEL_LOG, "--------------insert--:" + e.getMessage());}query(true);}private void update(Component component) {HiLog.info(LABEL_LOG, "----------------update");try {Person p = new Person();p.setName("Tom_update");p.setAge(0);p.setUserId(1);suid.update(p); //根据id修改对象} catch (Exception exception) {HiLog.error(LABEL_LOG, "%{public}s", "update: dataRemote exception|illegalStateException");}query(true);}private void query(boolean queryAll) {HiLog.info(LABEL_LOG, "----------------query");getGlobalTaskDispatcher(TaskPriority.DEFAULT).asyncDispatch(() -> {List list = null;if (queryAll) {  //查所有list = suid.select(new Person());}else {list = suidRich.select(new Person(), 2, 5); //查从第2条开始的5条数据}appendText(list);});}