spring+Mongodb简单整合

1、Mongodb概述

Mongodb是面向文档的数据库，与关系型数据库有很大不同，它不能在表中存储数据，而是以文档的形式来存储数据，MongoDB 没有结构化语言。如果你想创建一个新的文档类型，你不用做任何事来告诉数据库关于这些数据的结构，而仅仅是存到数据库中即可。MongoDB 的 API 是 JSON 对象和 JavaScript 函数的本地混合物，所以mongodb的数据处理方式类似于javascript或php，也就是说其数据库是灵活的弱类型。

2、Mongodb的安装

首先我们从官网上http://www.mongodb.org/downloads下载 mongodbmongodb-win32-i386-2.4.3.zip

我下载的是windows-32位的，将其解压到E盘下，然后在E盘新建data文件夹，在data文件夹中创建db文件夹和log文件夹，在log文件夹中创建Mongo.log用来记录日志，接着打开dos命令窗口，进入到E盘下解压后的mongodb文件夹下的bin目录，执行：

mongod -dbpath "E:\data\db"

执行此命令即将mongodb的数据库文件创建到E:\data\db 目录，不出意外的会看到命令最后一行sucess的成功提示

此时数据库就已启动，该界面为Mongo的启动程序，关闭后可直接双击bin下的mongod.exe  (注意是d，这个是启动程序）

启动程序开启后，再运行mongo.exe 程序（注意没有d) ，然后我们就可以再mongo.exe启动后的界面操作数据库了。这里就不做简单的测试了，我们直接整合spring和Mongodb。

 

3、spring和Mongodb的整合

 我们使用maven来管理所需的jar文件，pom.xml代码如下：

<dependencies><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-commons</artifactId><version>1.5.1.RELEASE</version></dependency><dependency><groupId>org.mongodb</groupId><artifactId>mongo-java-driver</artifactId><version>2.7.3</version></dependency><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-mongodb</artifactId><version>1.2.1.RELEASE</version></dependency><!-- spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>3.2.3.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>3.2.3.RELEASE</version></dependency><!-- spring --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.1</version><scope>provided</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version></dependency></dependencies>

这样我们就导入了所有所需的jar包，创建spring.xml配置文件来实现他们的整合

spring.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/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/data/mongohttp://www.springframework.org/schema/data/mongo/spring-mongo-1.1.xsd"> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>classpath:database.properties</value>            </list>        </property>    </bean><mongo:mongo host="${mongodb.host}" port="${mongodb.port}" id="mongoDb">        <mongo:options connections-per-host="200"                       threads-allowed-to-block-for-connection-multiplier="5"                       connect-timeout="5000"                       max-wait-time="5000"                       auto-connect-retry="true"                       socket-keep-alive="true"                       socket-timeout="5000"                       slave-ok="true"                       write-number="1"                       write-timeout="0"                       write-fsync="true"/>    </mongo:mongo>    <mongo:db-factory id="mongoDbFactory" dbname="${db.name}" mongo-ref="mongoDb"/><!-- <bean id="userCredentials" class="org.springframework.data.authentication.UserCredentials">          <constructor-arg name="username"  value="userName"/>          <constructor-arg name="password"  value="password"/>      </bean>   -->          <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">           <constructor-arg index="0" ref="mongoDbFactory"/>     </bean>  </beans>

 

database.properties

mongodb.host=127.0.0.1mongodb.port=27017db.name=mkk

admin.java类

package com.dxy.model;public class Admin {private String name ;private String password ;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

AdminDaoI.java接口

package com.dxy.dao;public interface AdminDaoI {public void add();public void find();public void update();public void delete();}

AdminDaoImpl.java类

package com.dxy.dao.impl;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.Criteria;import org.springframework.data.mongodb.core.query.Query;import org.springframework.data.mongodb.core.query.Update;import com.dxy.dao.AdminDaoI;import com.dxy.model.Admin;public class AdminDaoImpl implements AdminDaoI {private static ApplicationContext ac = null;private static MongoTemplate mongoTemplate = null;static{ac = new ClassPathXmlApplicationContext("classpath:spring.xml");mongoTemplate = (MongoTemplate)ac.getBean("mongoTemplate");}@Overridepublic void add() {Admin admin = new Admin();admin.setName("sdfsdf");admin.setPassword("sssss");mongoTemplate.save(admin, "admin");}@Overridepublic void find() {Admin admin = mongoTemplate.findOne(new Query(Criteria.where("name").is("sdfsdf")), Admin.class, "admin");System.out.println(admin.getPassword());}@Overridepublic void update() {mongoTemplate.updateFirst(new Query(Criteria.where("name").is("sdfsdf")),Update.update("password", "password") , Admin.class);Admin admin = mongoTemplate.findOne(new Query(Criteria.where("name").is("sdfsdf")), Admin.class, "admin");System.out.println(admin.getPassword());}@Overridepublic void delete() {long ab = mongoTemplate.count(new Query(Criteria.where("name").is("sdfsdf")), "admin");System.out.println(ab);mongoTemplate.remove(new Query(Criteria.where("name").is("sdfsdf")), "admin");long a = mongoTemplate.count(new Query(Criteria.where("name").is("sdfsdf")), "admin");System.out.println(a);}}

接下来创建junit测试类AdminDaoImplTest.java

package com.dxy.dao.impl;import org.junit.Before;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.dxy.dao.AdminDaoI;public class AdminDaoImplTest {ApplicationContext ac = null;AdminDaoI adminDao = null;@Beforepublic void testBefore() {ac = new ClassPathXmlApplicationContext("classpath:spring.xml");adminDao = (AdminDaoI)ac.getBean("adminDao");}@Testpublic void testAdd() {adminDao.add();}@Testpublic void testFind() {adminDao.find();}@Testpublic void testUpdate() {adminDao.update();}@Testpublic void testDelete() {adminDao.delete();}}

进行增删改查的测试，搞定，注意在测试的时候要启动mongodb数据库，最后还有一些问题，就是在spring.xml文件中只要使用<mongo:mongo>标签，那么首行就会出现一个红叉，说什么xsd有问题，搞了半天都没搞定，最后又重新安装了一遍myeclipse还是没搞定，不过不影响程序的运行。听我们出去实习的同学说他们用Mongodb，就简单的尝试一下，因为快要实习了，得赶紧准备面试了，估计也就这么看一下，以后有时间再仔细研究吧。

最后再分享一个关于解析Mongodb源码的博客：http://www.iteye.com/blogs/subjects/MongoDBJavaDriver