mongodb-orm簡介

• Mongodb ORM是基于java的ORM框架，簡化了SDK的使用，使代碼變得更清晰、簡單。 
  

• 與Ibatis類似，將查詢、執(zhí)行語句封裝在xml中，與代碼隔離。簡稱MQL。 
  

項目中使用

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" /> <!-- 可使用默認(rèn)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>

        代碼初始化

    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();
    }

編寫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>

• 有嵌套的查詢
  

<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);

        更多的使用方法參見 sample.xml