Mongodb-ORM —— 基于 Java 的 ORM 框架

mongodb-orm简介

• Mongodb ORM是基于java的ORM框架，简化了SDK的使用，使代码变得更清晰、简单。

• 与Ibatis类似，将查询、执行语句封装在xml中，与代码隔离。简称MQL。

项目中使用

加入mongodb orm的支持包

• 1. 添加jar包或maven支持

<dependency>     <groupId>com.mongodborm</groupId>     <artifactId>mongodb-orm</artifactId>     <version>0.0.1-RELEASE</version> </dependency>

• 2. 初始化mongodb templet

spring中初始化

<bean id="mongoTemplet" class="com.mongodb.client.MongoClientTemplet">     <property name="factory">         <bean class="com.mongodb.client.MongoORMFactoryBean">             <property name="dataSource">                 <bean class="com.mongodb.client.MongoDataSource">                     <property name="nodeList" value="127.0.0.1:27017" />                     <property name="dbName" value="your db name" />                     <property name="userName" value="user name" />                     <property name="passWord" value="password" /> <!-- 可使用默认值 --> <property name="connectionsPerHost" value="" />                     <property name="threadsAllowedToBlock" value="" />                     <property name="connectionTimeOut" value="" />                     <property name="maxRetryTime" value="" />                     <property name="socketTimeOut" value="" />                 </bean>             </property>             <property name="configLocations">                 <list>                     <value>classpath:mql/mongo-mql.xml</value>                 </list>             </property>         </bean>     </property> </bean>

代码初始化

    try {       Resource resource =  new ClassPathResource("mongo-mql.xml");           MongoORMFactoryBean factory = new MongoORMFactoryBean();       factory.setConfigLocations(new Resource[]{resource});       factory.init();          MongoClientTemplet templet = new MongoClientTemplet();       templet.setFactory(factory);       templet.init();     } catch(Exception e) {       e.printStackTrace();     }

编写MQL

• Mapping

<mapping id="model" class="test.mongodborm.Model">         <property column="_id" name="id" />         <property column="name" name="name" />         <property column="time" name="time" value="0" />         <property column="status" name="status" /> </mapping>  <mapping id="extendModel" class="test.mongodborm.Model" extends="model">     <property column="newProperty" name="newProperty" /> </mapping>

• select

<select id="queryModelList" collection="test_sample">     <query class="java.lang.String">         <property column="name" name="${value}" />     </query>     <field mapping="model" />     <order>         <property column="time" value="desc" />     </order> </select>

• update/findAndModify

<update id="updateModel" collection="test_sample">     <query class="test.mongodborm.Model$Child">         <property column="name" name="name" ignoreNull="true" />         <property column="time" operate="gte" value="0" type="number" />         <property column="status" operate="in">             <list type="number">0,1</list>         </property>     </query>     <action class="java.util.Map">         <property column="name" name="name" operate="set" />         <property column="status" operate="set" />     </action> </update>

• 有嵌套的查询

<select id="queryModelList3" collection="test_sample">     <query class="java.lang.String">         <property column="_id" value="${value}" />         <property column="time" value="0" type="number" />     </query>     <field class="java.util.Map">         <property column="name" name="name" />         <property column="parent" name="parent">             <value class="test.mongodborm.Model$Parent">                 <property column="name" name="name" />                 <property column="child" name="child">                     <value class="test.mongodborm.Model$Child">                         <property column="name" name="name" />                         <property column="time" name="time" value="0" />                     </value>                 </property>                 <property column="data" name="data">                     <value class="java.util.Map">                         <property column="title" name="title" />                         <property column="content" name="content" />                     </value>                 </property>             </value>         </property>         <property column="data" name="data">             <value class="java.util.Map">                 <property column="title" name="title" />                 <property column="content" name="content" />             </value>         </property>     </field>     <order class="java.util.Map">         <property column="time" name="time" value="desc" />     </order> </select>

Templet用法

Model model = mongoTemplet.findOne("queryModelList", "yuxiangping");  List<Model> list = mongoTemplet.findOne("queryModelList", "");  Model model = new Model(); model.setTime(1L); Map<String, String> action = new HashMap<String, String>(); action.put("name", "yuxiangping-update"); int update = mongoT emplet.update("updateModel", model, action);

更多的使用方法参见 sample.xml