如何优雅的进行Spring整合MongoDB详解

前言

本文重点是要将mongodb与spring整合到项目中去，在实践中发现问题，追踪问题，然后解决问题。下面话不多说了，来一起看看详细的介绍吧。

一、准备

Maven、Spring(spring-data-mongodb)
spring Data for MongoDB是Spring Data的一个子模块。目标是为mongodb提供一个相近的一致的基于Spring的编程模型。
Spring Data for MongoDB核心功能是映射POJO到Mongo的DBCollection中的文档，并且提供Repository 风格数据访问层。

二、特性

MongoDB的提供了一个面向文档存储，操作起来比较简单和容易。
你可以在MongoDB记录中设置任何属性的索引 (如：FirstName="Ning",Address="Beijing")来实现更快的排序。
你可以通过本地或者网络创建数据镜像，这使得MongoDB有更强的扩展性。
如果负载的增加（需要更多的存储空间和更强的处理能力），它可以分布在计算机网络中的其他节点上这就是所谓的分片。
Mongo支持丰富的查询表达式。查询指令使用JSON形式的标记，可轻易查询文档中内嵌的对象及数组。
MongoDb 使用update()命令可以实现替换完成的文档（数据）或者一些指定的数据字段。
Mongodb中的Map/reduce主要是用来对数据进行批量处理和聚合操作。
Map和Reduce。Map函数调用emit(key,value)遍历集合中所有的记录，将key与value传给Reduce函数进行处理。
Map函数和Reduce函数是使用Javascript编写的，并可以通过db.runCommand或mapreduce命令来执行MapReduce操作。
GridFS是MongoDB中的一个内置功能，可以用于存放大量小文件。
MongoDB允许在服务端执行脚本，可以用Javascript编写某个函数，直接在服务端执行，也可以把函数的定义存储在服务端，下次直接调用即可。
MongoDB支持各种编程语言:RUBY，PYTHON，JAVA，C++，PHP，C#等多种语言。

三、依赖包

<dependency>

<groupId>org.springframework.data</groupId>

<artifactId>spring-data-mongodb</artifactId>

<version>1.5.0.RELEASE</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>1.5.10</version>

</dependency>

spring 相关依赖

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>3.1.2.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>4.3.1.RELEASE</version>

</dependency>

四、集成MongoDB

【注：MongoDB添加权限管理请参见我的这篇文章:MongDB开启权限认证】

mongodb.properties

mongo.hostport=172.16.4.166:27017

mongo.dbname=ad_api_count

mongo.username=hehaitao

mongo.password=hehaitao

mongo.connectionsPerHost=8

mongo.threadsAllowedToBlockForConnectionMultiplier=4

#\\u8FDE\\u63A5\\u8D85\\u65F6\\u65F6\\u95F4

mongo.connectTimeout=1000

#\\u7B49\\u5F85\\u65F6\\u95F4

mongo.maxWaitTime=1500

mongo.autoConnectRetry=true

mongo.socketKeepAlive=true

#Socket\\u8D85\\u65F6\\u65F6\\u95F4

mongo.socketTimeout=1500

mongo.slaveOk=true

mongoDB.xml

<?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: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-3.1.xsd

http://www.springframework.org/schema/data/mongo

http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">

<context:property-placeholder location="classpath:mongodb.properties" ignore-unresolvable="true"/>

<!-- 定义mongo对象，对应的是mongodb官方jar包中的Mongo，replica-set设置集群副本的ip地址和端口 -->

<mongo:mongo id="mongo" replica-set="${mongo.hostport}">

<mongo:options

connections-per-host="${mongo.connectionsPerHost}"

threads-allowed-to-block-for-connection-multiplier="${mongo.threadsAllowedToBlockForConnectionMultiplier}"

connect-timeout="${mongo.connectTimeout}"

max-wait-time="${mongo.maxWaitTime}"

auto-connect-retry="${mongo.autoConnectRetry}"

socket-keep-alive="${mongo.socketKeepAlive}"

socket-timeout="${mongo.socketTimeout}"

slave-ok="${mongo.slaveOk}"

write-number="1"

write-timeout="0"

write-fsync="true"/>

</mongo:mongo>

<mongo:db-factory id="mgFactory"

dbname="${mongo.dbname}"

username="${mongo.username}"

password="${mongo.password}"

mongo-ref="mongo" />

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">

<constructor-arg name="mongoDbFactory" ref="mgFactory"/>

</bean>

</beans>

spring-contex.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:aop="http://www.springframework.org/schema/aop"

xmlns:task="http://www.springframework.org/schema/task"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans

<a href="http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

</a> <a href="http://www.springframework.org/schema/context">http://www.springframework.org/schema/context

</a> <a href="http://www.springframework.org/schema/context/spring-context-3.1.xsd">http://www.springframework.org/schema/context/spring-context-3.1.xsd

</a> http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.1.xsd

http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd">

<aop:aspectj-autoproxy proxy-target-class="true"/>

<context:annotation-config/>

<context:component-scan base-package="com.lutong.cps">

<context:exclude-filter type = "annotation" expression = "org.springframework.stereotype.Controller"/>

</context:component-scan>

<import resource="mongoDB.xml"/>

</beans>

五、代码实现

基础实现MongoDBService

/**

* File Name : MongoDBService.java

* Package : com.lutongnet.ad.service

* Description : TODO

* Author : zhangfj

* Date : 2012-11-29

* Version : V1.0

*/

package com.lutong.cps.schedule.service.fj;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.data.mongodb.core.MongoTemplate;

import org.springframework.data.mongodb.core.query.Query;

import org.springframework.stereotype.Service;

/**

* @author zhangfj

*

*/

@Service("mongoDBService")

public class MongoDBService

{

/*@Resource(name = "mongoTemplate")

protected MongoTemplate mongoTemplate;*/

/**

*

* @param query

* @param entityClass

* @return T

*/

public <T> T findOne(Query query, Class<T> entityClass)

{

ApplicationContext context=new ClassPathXmlApplicationContext("mongoDB.xml");

MongoTemplate mongoTemplate= (MongoTemplate) context.getBean("mongoTemplate");

// 可以直接调用

return mongoTemplate.findOne(query, entityClass);

}

继承类UserAdCountService

/**

* File Name : UserAdCountService.java

* Package : com.lutongnet.ad.service

* Description : TODO

* Author : zhangfj

* Date : 2012-11-29

* Version : V1.0

*/

package com.lutong.cps.schedule.service.fj;

import org.springframework.data.mongodb.core.query.Criteria;

import org.springframework.data.mongodb.core.query.Query;

import org.springframework.stereotype.Service;

import com.lutong.cps.schedule.entity.UserAdCount;

/**

* @author zhangfj

*

*/

@Service("userAdCountService")

public class UserAdCountService extends MongoDBService

{

/**

* 获取单个广告的观看次数，查询不到则返回0

*

* @param adCode

* @return int

*/

public int getUserAdCount(UserAdCount adCode)

{

Criteria criteria = new Criteria();

criteria.andOperator(Criteria.where("userAd").is(adCode.getUserAd()),

Criteria.where("adCode").is(adCode.getAdCode()),

Criteria.where("countDate").is(adCode.getCountDate()));

Query query = new Query(criteria);

UserAdCount result = findOne(query, UserAdCount.class);

if (null != result)

{

return result.getTimesCount();

}

return 0;

}

实体类UserAdCount

package com.lutong.cps.schedule.entity;

import java.util.Date;

import org.springframework.data.annotation.PersistenceConstructor;

import org.springframework.data.mongodb.core.mapping.Document;

/**

* mongo专用统计单个用户的单个广告观看次数

* @author cancer

*

*/

@Document(collection="userAdCount")

public class UserAdCount

{

private int timesCount;

/**

* 用户账号

*/

private String userAd;

private String adCode;

private String countDate;

private Date expireAt;

@PersistenceConstructor

public UserAdCount(int timesCount, String userAd,String adCode,String countDate,Date expireAt)

{

this.timesCount = timesCount;

this.userAd = userAd;

this.adCode = adCode;

this.countDate = countDate;

this.expireAt = expireAt;

}

public UserAdCount(String userAd,String adCode,String countDate)

{

this.userAd = userAd;

this.adCode = adCode;

this.countDate = countDate;

}

public UserAdCount(String userAd,String adCode,String countDate,Date expireAt)

{

this.userAd = userAd;

this.adCode = adCode;

this.countDate = countDate;

this.expireAt = expireAt;

}

public UserAdCount(String countDate)

{

this.countDate = countDate;

}

public int getTimesCount()

{

return timesCount;

}

public void setTimesCount(int timesCount)

{

this.timesCount = timesCount;

}

public String getUserAd()

{

return userAd;

}

public void setUserAd(String userAd)

{

this.userAd = userAd;

}

public String getAdCode()

{

return adCode;

}

public void setAdCode(String adCode)

{

this.adCode = adCode;

}

public String getCountDate() {

return countDate;

}

public void setCountDate(String countDate) {

this.countDate = countDate;

}

public Date getExpireAt() {

return expireAt;

}

public void setExpireAt(Date expireAt) {

this.expireAt = expireAt;

}

最后写一个测试类来测试下

如何优雅的进行Spring整合MongoDB详解

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