Orient DB 是一个可伸缩的文档数据库，支持 ACID 事务处理。使用 Java 5 实现。

使用示例：

// OPEN THE DATABASE ODatabaseDocumentTx db = new ODatabaseDocumentTx("remote:localhost/petshop").open("admin", "admin");

// CREATE A NEW DOCUMENT AND FILL IT ODocument doc = new ODocument("Person");
doc.field( "name", "Luke" );
doc.field( "surname", "Skywalker" );
doc.field( "city", new ODocument("City" ).field("name","Rome").field("country", "Italy") );
              
// SAVE THE DOCUMENT
doc.save();

// QUERY THE DOCUMENT
List result = database.query(
  new OSQLSynchQuery>("select * from person where city.name = 'Rome'")).execute();

// PRINT THE RESULT SET
for( ODocument d : result ){
  System.out.println("Person: " + d.field( "name" ) + d.field( "surname" ));
}

db.close();

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