mongodb数据库的使用实例

1，首先maven工程引入相关jar(spring-data-mongodb版本太低后面连接数据库时会报异常，具体异常忘了......)

<!-- mongodb -->
		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>mongodb-driver</artifactId>
			<version>3.2.2</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-mongodb</artifactId>
			<version>1.8.0.RELEASE</version>
		</dependency>

2，applicationContext-mongodb.xml的配置文件（此处可以独立一个配置文件）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       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-2.5.xsd
        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">
        
	<!-- 如果重复的文件是会报错的 -->
	<!-- <context:property-placeholder location="classpath:properties/jdbc.properties" /> -->
   <context:component-scan base-package="com.ky"/>

    <!-- 1.7版本+不支持mongo,支持mongo-client,options为client-options -->
    <!-- Usage of 'UserCredentials' with 'MongoClient' is no longer supported -->
    <!-- 配置mongodb连接池 ,创建mongoClient实例-->
    <!--credentials="mongodb://${mongo.user}:${mongo.pwd}@${mongo.host}:${mongo.port}/${mongo
    .defaultDbName}"为什么不起作用
    如果需要验证,mongo-client需要加这句: credentials="${mongo.user}:${mongo.pwd}@${mongo.defaultDbName}"
    -->
    <mongo:mongo-client id="mongoClient"  host="${mongo.host}" port="${mongo.port}" >
        <mongo:client-options
                connections-per-host="${mongo.connectionsPerHost}"
                min-connections-per-host="${mongo.minConnectionsPerHost}"
                threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"
                connect-timeout="${mongo.connectTimeout}"
                max-wait-time="${mongo.maxWaitTime}"
                socket-keep-alive="${mongo.socketKeepAlive}"
                socket-timeout="${mongo.socketTimeout}"
                description="${mongo.description}"
                max-connection-idle-time="${mongo.maxConnectionIdleTime}"
                max-connection-life-time="${mongo.maxConnectionLifeTime}"
                heartbeat-socket-timeout="${mongo.heartbeatSocketTimeout}"
                heartbeat-connect-timeout="${mongo.heartbeatConnectTimeout}"
                min-heartbeat-frequency="${mongo.minHeartbeatFrequency}"
                heartbeat-frequency="${mongo.heartbeatFrequency}"

        />
    </mongo:mongo-client>

    <!-- dbname="${mongo.defaultDbName}" host="${mongo.host}"
                      port="${mongo.port}" username="${mongo.user}" password="${mongo.pwd}"
                      mongo-ref="mongoClient" -->
    <mongo:db-factory id="mongoDbFactory"
                      dbname="${mongo.defaultDbName}"
                      mongo-ref="mongoClient"/>

    <!-- 1.Spring提供的mongodb操作模板-->
    <!-- <mongo:template id="mongoTemplate" db-factory-ref="mongoDbFactory" write-concern="NORMAL"/> -->
    <!-- 2.Spring提供的mongodb操作模板-->
    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
        <constructor-arg ref="mongoDbFactory" />
    </bean>


  <!-- MongoDB GridFS Template 支持，操作mongodb存放的文件 -->
    <mongo:mapping-converter id="converter" db-factory-ref="mongoDbFactory"
                             base-package="xxxx.dao"/>
    <mongo:gridFsTemplate id="gridFsTemplcate" db-factory-ref="mongoDbFactory" converter-ref="converter" />

    <!-- mongodb bean的仓库目录，会自动扫描扩展了MongoRepository接口的接口进行注入 -->
    <!-- <mongo:repositories base-package="xxx.bean" />  -->

    <!--激活注解-->
    <bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor"/>

</beans>

其中，连接数据库可以使用密码，也可以不用密码，这里因为时自己跑的程序所以数据库没有设置密码

1.7版本+不支持mongo,支持mongo-client,options为client-options，如果使用mongo并且使用useCredentials，则会出现Usage of 'UserCredentials' with 'MongoClient' is no longer supported提示，编译出错。
根据某些教程甚至是官网也能看到下面这种认证配置，但是经测试在1.8的版本中不起任何作用。

credentials="mongodb://${mongo.user}:${mongo.pwd}@${mongo.host}:${mongo.port}/${mongo.defaultDbName}"

3，jdbc.properties配置文件

mongo.host=192.168.xxx.xxx
mongo.port=27017
mongo.defaultDbName=mylearndb
#mongo.user=joyven
#mongo.pwd=123456
mongo.connectionsPerHost=10
mongo.threadsAllowedToBlockForConnectionMultiplier=5
mongo.minConnectionsPerHost=5
#\u8FDE\u63A5\u8D85\u65F6\u65F6\u95F4
mongo.connectTimeout=10000
#\u7B49\u5F85\u65F6\u95F4
mongo.maxWaitTime=120000
#Socket\u8D85\u65F6\u65F6\u95F4
mongo.socketTimeout=0
mongo.socketKeepAlive=true

mongo.description=joyven test mongodb database
mongo.maxConnectionIdleTime=1500
mongo.maxConnectionLifeTime=0
#mongo slave
mongo.heartbeatSocketTimeout=1000
mongo.heartbeatConnectTimeout=1500
mongo.minHeartbeatFrequency=5
mongo.heartbeatFrequency=10

补上几个参考的链接：

https://segmentfault.com/a/1190000005829384

https://blog.csdn.net/zhanglf02/article/details/77937850

https://blog.csdn.net/qq_16313365/article/details/70142729

https://www.cnblogs.com/bornteam/p/4129121.html