MJORM (mongo-java-orm) - 一個MongoDB的Java ORM 框架

該項目旨在為MongoDB和Java提供強大的查詢API和ORM框架。這個項目的目標是：

• 實現MongoDB驅動的DBObjects與POJOs之間的對象關系映射
• 使其更容易編寫可測試MongoDB的數據訪問代碼
• 提供更高級別的MongoDB API來實現一些常見任務
• 易于Spring框架集成
• 提供一個基于XML的ORM框架
• 提供一個基于注釋的ORM框架
</ul>

特性包括:

• XML and annotation based mapping configuration for POJOs
• Automatic DBObject to POJO (and vica verca) conversion
• XML and JavaScript based Map\Reduce configuration and helper classes
• High level query API via the MongoDao
• Lower level criteria query API via DaoQuery and DaoModifier
• MQL (MJORM query language. aka "Michael") a DSL for querying mongo similar to SQL
• Easy integration with the Spring Framework
</ul>

package com.googlecode.mjorm;

@Entity
public class Person {
        private String id;
        private String firstName;
        private String lastName;
        private Address address;

        @Id
        @Property
        public String getId() { return id; }
        public void setId(String id) { this.id = id; }

        @Property
        public String getFirstName() { return firstName; }
        public void setFirstName(String firstName) { this.firstName = firstName; }

        @Property
        public String getLastName() { return lastName; }
        public void setLastName(String lastName) { this.lastName = lastName; }

        @Property
        public Address getAddress() { return address; }
        public void setAddress(Address address) { this.address = address; }

}

@Entity
public class Address {
        private String street;
        private String city;
        private String state;
        private String zipCode;

        @Property
        public String getStreet() { return street; }
        public void setStreet(String street) { this.street = street; }

        @Property
        public String getCity() { return city; }
        public void setCity(String city) { this.city = city; }

        @Property
        public String getState() { return state; }
        public void setState(String state) { this.state = state; }

        @Property
        public String getZipCode() { return zipCode; }
        public void setZipCode(String zipCode) { this.zipCode = zipCode; }
}

// connect to mongo
Mongo mongo = new Mongo(new MongoURI(uri)); // 10gen driver

// create object mapper and add classes
AnnotationsDescriptorObjectMapper objectMapper = new AnnotationsDescriptorObjectMapper();
mapper.addClass(Person.class);
mapper.addClass(Address.class);

// create MongoDao
MongoDao dao = new MongoDaoImpl(mongo.getDB("dbName"), objectMapper);

項目主頁：http://www.baiduhome.net/lib/view/home/1372746902675