Java轻量级ORM持久层框架：ORMLite
jopen
11年前
ORMLite是一个轻量级的Java对象关系映射持久层框架。支持包括 MySQL、Postgres、Microsoft SQL Server、H2、Derby、HSQLDB和Sqlite等在内的数据库。提供灵活的QueryBuilder来构建复杂的数据查询。强大的抽象 DAO类，只需5行代码便能够自动生成SQL来创建和删除数据库表格。
RMLite易于使用并提供了以下特性：
- Setup your classes by simply adding Java annotations.
- Powerful abstract Database Access Object (DAO) classes.
- Flexible QueryBuilder to easily construct simple and complex queries.
- Supports MySQL, Postgres, Microsoft SQL Server, H2, Derby, HSQLDB, and Sqlite and can be extended to additional databases relatively easily.
- Provisional support for DB2, Oracle, ODBC, and Netezza. Contact the author if your database type is not supported.
- Handles "compiled" SQL statements for repetitive query tasks.
- Supports "foreign" objects with the class field being the object but an id stored in the database table.
- Basic support for database transactions.
- Auto generates SQL to create and drop database tables.
- Spring configuration support for DOAs and class configurations.
- Support for configuring of tables and fields without annotations.
- Supports native calls to Android SQLite database APIs
示例代码：
public class AccountApp { public static void main(String[] args) throws Exception { // this uses h2 by default but change to match your database String databaseUrl = "jdbc:h2:mem:account"; // create a connection source to our database ConnectionSource connectionSource = new JdbcConnectionSource(databaseUrl); // instantiate the dao AccountDaoImpl accountDao = new AccountDaoImpl(connectionSource); // if you need to create the 'accounts' table make this call TableUtils.createTable(connectionSource, Account.class);