Srping操作MongoDB

1、在pom中加入spring-data的依赖
<dependencies>
  <!-- other dependency elements omitted -->
  <dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.1.0.RELEASE</version>
  </dependency>
</dependencies>

并在通dependencies同层次加入spring的repository来下载相关的依赖包
<repositories>
  <repository>
    <id>spring-milestone</id>
    <name>Spring Maven MILESTONE Repository</name>
    <url>http://repo.springsource.org/libs-milestone</url>
  </repository>
</repositories>

2、在spring配置文件中定义mongoDB的相关信息,并注册MongoTemplate
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mongo="http://www.springframework.org/schema/data/mongo"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/data/mongo
        http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd">

	<!-- mongo configure start -->
	<mongo:mongo host="localhost" port="30000">
	</mongo:mongo>

	<mongo:db-factory dbname="weather" mongo-ref="mongo" />

	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
		<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
	</bean>
</beans>

MongoTemplate的重载的构造方法.如下所示:

    MongoTemplate (Mongo mongo, String databaseName) - takes the com.mongodb.Mongo object and the default database name to operate against.

    MongoTemplate (Mongo mongo, String databaseName, UserCredentials userCredentials) - adds the username and password for authenticating with the database.

    MongoTemplate (MongoDbFactory mongoDbFactory) - takes a MongoDbFactory object that encapsulated the com.mongodb.Mongo object, database name, and username and password.

    MongoTemplate (MongoDbFactory mongoDbFactory, MongoConverter mongoConverter) - adds a MongoConverter to use for mapping.
也可以通过如下的方式定义MongoTemplate
<mongo:mongo host="localhost" port="27017"/>
  
  <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg ref="mongo"/>
    <constructor-arg name="databaseName" value="geospatial"/>
  </bean>

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