Spring整合MongoDB 怎样优雅的进行Spring整合MongoDB详解
骑白马的菜鸟 人气:0想了解怎样优雅的进行Spring整合MongoDB详解的相关内容吗,骑白马的菜鸟在本文为您仔细讲解Spring整合MongoDB的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:mongodb,spring,整合,spring和mongodb整合,mongodb与spring整合,下面大家一起来学习吧。
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
<!-- spring web相关依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>3.1.2.RELEASE</version> </dependency> <!-- spring test依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.3.1.RELEASE</version> </dependency>
四、集成MongoDB
【注:MongoDB添加权限管理请参见我的这篇文章:MongDB开启权限认证】
mongodb.properties
mongo.hostport=172.16.4.166:27017 mongo.dbname=ad_api_count mongo.username=hehaitao mongo.password=hehaitao mongo.connectionsPerHost=8 mongo.threadsAllowedToBlockForConnectionMultiplier=4 #\u8FDE\u63A5\u8D85\u65F6\u65F6\u95F4 mongo.connectTimeout=1000 #\u7B49\u5F85\u65F6\u95F4 mongo.maxWaitTime=1500 mongo.autoConnectRetry=true mongo.socketKeepAlive=true #Socket\u8D85\u65F6\u65F6\u95F4 mongo.socketTimeout=1500 mongo.slaveOk=true
mongoDB.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd"> <!-- 加载mongodb的属性配置文件 --> <context:property-placeholder location="classpath:mongodb.properties" ignore-unresolvable="true"/> <!-- 定义mongo对象,对应的是mongodb官方jar包中的Mongo,replica-set设置集群副本的ip地址和端口 --> <mongo:mongo id="mongo" replica-set="${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 http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd 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"/> <!--使用注解管理bean --> <context:annotation-config/> <!-- 扫描com.lutongnet下的所有类 --> <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
import java.util.List; import javax.annotation.Resource; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.acts.web.modules.mark.model.Users; import com.lutong.cps.schedule.service.fj.UserAdCountService; @ContextConfiguration({ "classpath:spring-context.xml", "classpath:mongoDB.xml"}) @RunWith(SpringJUnit4ClassRunner.class) public class UserTest { @Resource(name = "userAdCountService") private UserAdCountService userAdCountService; @Test public void testDao() { try { UserAdCount userAdCount = new UserAdCount("hehaitao", "pos001", DateTime.now().toString("yyyy-MM-dd")); int count = userAdCountService .getUserAdCount(userAdCount); System.out.println(count); } catch (Exception e) { e.printStackTrace(); } } }
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,如果有疑问大家可以留言交流,谢谢大家对的支持。
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