NoSQL 之 Morphia 操作 MongoDB - 数据库编程

ue = IndexDirection.ASC, name = "bandName", unique = true)
String name;*/

ds.ensureCaps();
User user = new User();
user.setId(1306916670518L);
print("getDB: " + ds.getDB());
print("getDefaultWriteConcern: " + ds.getDefaultWriteConcern());
print("DBColl: " + ds.getCollection(User.class)); // 查询User对象对应的集合
Key key = ds.getKey(user); // 主键
print("getKey: " + key);
print("exists: " + ds.exists(user)); //是否存在该对象
print("exists: " + ds.exists(ds.getKey(user)));

print("getByKey: " + ds.getByKey(User.class, key));
List> keys = new ArrayList>();
keys.add(key);
user.setId(1306916670521L);
keys.add(ds.getKey(user));
print("getByKey: " + ds.getByKeys(keys));
print("getByKey: " + ds.getByKeys(User.class, keys));

query();
}

用Morphia操作对象相对比较简单，它对MongoDB对Java的操作进行了一些封装，特别是查询这方面的。有没有感觉像是在用Hibernate？

作者：hoojo

NoSQL 之 Morphia 操作 MongoDB (三)