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
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<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
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<!-- spring web相关依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version> 3.1 . 2 .RELEASE</version> </dependency> <!-- spring test依赖 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version> 4.3 . 1 .RELEASE</version> </dependency> |
四、集成MongoDB
【注:MongoDB添加权限管理请参见我的这篇文章:MongDB开启权限认证】
mongodb.properties
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mongo.hostport= 172.16 . 4.166 : 27017 mongo.dbname=ad_api_count mongo.username=hehaitao mongo.password=hehaitao mongo.connectionsPerHost= 8 mongo.threadsAllowedToBlockForConnectionMultiplier= 4 #\u8FDE\u63A5\u8D85\u65F6\u65F6\u95F4 mongo.connectTimeout= 1000 #\u7B49\u5F85\u65F6\u95F4 mongo.maxWaitTime= 1500 mongo.autoConnectRetry= true mongo.socketKeepAlive= true #Socket\u8D85\u65F6\u65F6\u95F4 mongo.socketTimeout= 1500 mongo.slaveOk= true |
mongoDB.xml
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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = "http://www.springframework.org/schema/beans" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns:context = "http://www.springframework.org/schema/context" xmlns:mongo = "http://www.springframework.org/schema/data/mongo" xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd"> <!-- 加载mongodb的属性配置文件 --> < context:property-placeholder location = "classpath:mongodb.properties" ignore-unresolvable = "true" /> <!-- 定义mongo对象,对应的是mongodb官方jar包中的Mongo,replica-set设置集群副本的ip地址和端口 --> < mongo:mongo id = "mongo" replica-set = "${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
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<? 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" /> <!--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
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/** * 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
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/** * 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
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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
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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,谢谢大家对服务器之家的支持。
原文链接:http://www.cnblogs.com/zishengY/p/8467176.html