230.4. 在 Spring XML 中配置数据库

以下 Spring XML 创建一个 bean，定义与 MongoDB 实例的连接。

从 mongo java 驱动程序 3 开始，WriteConcern 和 readPreference 选项不可动态修改。它们在 mongoClient 对象中定义

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/data/mongo
      http://www.springframework.org/schema/data/mongo/spring-mongo.xsd
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd">

  <mongo:mongo-client id="mongoBean" host="${mongo.url}" port="${mongo.port}" credentials="${mongo.user}:${mongo.pass}@${mongo.dbname}">
    <mongo:client-options write-concern="NORMAL" />
  </mongo:mongo-client>
</beans>