Sqlbean是一款使用Java面向对象思想来编写并生成Sql语句的工具,在此基础上对Android SQLite实现轻量级插件支持。其中内置大量常用SQL执行的方法,可以非常方便的达到你想要的目的,相对复杂的SQL语句也得以支持,在常规的项目开发几乎做到不写SQL,可以有效的提高项目开发的效率,让开发者更专注于业务代码的编写。
implementation 'cn.vonce:vonce-sqlbean-android:1.2.0-beta11'
annotationProcessor 'cn.vonce:vonce-sqlbean-android:1.2.0-beta11'
@SqlTable("d_user")
public class User {
@SqlId(type = IdType.SNOWFLAKE_ID_16)
private Long id;
private String name;
private Integer age;
private Integer stature;
private Integer gender;
private String phone;
private Date createTime;
/**省略get set方法*/
}
public class MainActivity extends AppCompatActivity {
private SqlBeanHelper<Essay, String> essaySqlBeanHelper;
//private SqlBeanHelper<User, String> userSqlBeanHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//方式一,单库模式
SQLiteHelper.init(this, "testdb", 1);//建议放在MainActivity或继承的Application
essaySqlBeanHelper = SQLiteHelper.db().get(Essay.class);
//方式二,多库模式
//essaySqlBeanHelper = SQLiteHelper.db(this, "testdb1", 1).get(Essay.class);
//userSqlBeanHelper = SQLiteHelper.db(this, "testdb2", 1).get(User.class);
}
}
public class MainActivity extends AppCompatActivity {
private SqlBeanHelper<Essay, String> sqlBeanHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SQLiteHelper.init(this, "testdb", 1);
sqlBeanHelper = SQLiteHelper.db().get(Essay.class);
}
//查询
public void select() {
//查询列表
List<User> list = userService.select();
list = sqlBeanHelper.selectBy(Wrapper.where(Cond.gt(User::getId, 10)).and(Cond.lt(User::getId, 20)));
//指定查询
list = sqlBeanHelper.select(new Select().column(User::getId, User::getName, User::getPhone).where().gt(User::getId, 10));
//查询一条
User user = userService.selectById(1);
user = sqlBeanHelper.selectOneBy(Wrapper.where(eq(User::getId, 1001)));
//sql语义化查询《20岁且是女性的用户根据创建时间倒序,获取前10条》
list = sqlBeanHelper.select(new Select().column(User::getId, User::getName, User::getPhone).where().eq(User::getAge, 22).and().eq(User::getGender, 0).back().orderByDesc(User::getCreateTime).page(0, 10));
//联表查询《20岁且是女性的用户根据创建时间倒序,查询前10条用户的信息和地址》
Select select = new Select();
select.column(User::getId, User::getName, User::getPhone, UserAddress::getProvince, UserAddress::getCity, UserAddress::getArea, UserAddress::getDetails);
select.innerJoin(UserAddress.class).on().eq(UserAddress::getId, User::getId);
select.where().gt(User::getAge, 22).and().eq(User::getGender, 0);
select.orderByDesc(User::getCreateTime);
select.page(0, 10);
//查询Map
Map<String, Object> map = sqlBeanHelper.selectMap(select);
List<Map<String, Object>> mapList = sqlBeanHelper.selectMapList(select);
}
//分页
public void getPageList() {
// 查询对象
Select select = new Select();
PageHelper<User> pageHelper = new PageHelper<>(0, 10);
pageHelper.paging(select, sqlBeanHelper);
ResultData<List<Essay>> data = pageHelper.getResultData();
}
//更新
public void update(Essay essay) {
//根据bean内部id更新
long i = sqlBeanHelper.updateByBeanId(essay);
//根据外部id更新
//i = sqlBeanHelper.updateById(essay, 20);
//根据条件更新
//i = sqlBeanHelper.update(new Update<User>().set(User::getGender, 1).set(User::getName, "Jovi").setAdd(User::getAge, User::getAge, 1).where().eq(User::getId, 111).back());
}
//删除
public void deleteById(String[] id) {
//根据id删除
long i = sqlBeanHelper.deleteById(id);
//根据条件删除
//i = sqlBeanHelper.deleteBy(Wrapper.where(gt(User::getAge, 22)).and(eq(User::getGender, 1)));
}
//插入
public void add() {
List<Essay> essayList = new ArrayList<>();
for (int i = 0; i < 100; i++) {
Essay essay = new Essay(i, "name" + i);
essayList.add(essay);
}
sqlBeanHelper.insert(essayList);
}
}