spring+Mongodb简单整合

最新推荐文章于 2024-05-19 08:30:16 发布

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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.xsd
						http://www.springframework.org/schema/data/mongo
						http://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=127.0.0.1
mongodb.port=27017
db.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");
	}
	
	@Override
	public void add() {
		Admin admin = new Admin();
		admin.setName("sdfsdf");
		admin.setPassword("sssss");
		mongoTemplate.save(admin, "admin");
	}

	@Override
	public void find() {
		Admin admin = mongoTemplate.findOne(new Query(Criteria.where("name").is("sdfsdf")), Admin.class, "admin");
		System.out.println(admin.getPassword());
	}

	@Override
	public 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());
	}

	@Override
	public 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;
	
	
	@Before
	public void testBefore() {
		ac = new ClassPathXmlApplicationContext("classpath:spring.xml");
		adminDao = (AdminDaoI)ac.getBean("adminDao");
	}

	@Test
	public void testAdd() {
		
		adminDao.add();
	}
	
	@Test
	public void testFind() {
		adminDao.find();
	}
	
	@Test
	public void testUpdate() {
		adminDao.update();
	}
	
	@Test
	public 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