spring mvc mongoDb

http://www.cnblogs.com/dennisit/p/3372568.html

系统环境:

操作系统:  windows xp

数 据 库:  mongodb2.0.6

驱 动 包: Spring3.1.2 + mongodb2.7.3 + spring-data-mongodb1.0.1

说明: 对于xp系统用户,在执行mongod.exe安装mongodb时 出现,无法定位程序输入点 InterlockedCompareExchange64 于动态链接库KERNEL32.dll上,这是因为最新的开发分支已经不再支持xp.也就是说你的mongodb安装包不支持xp系统.V2.0.6是最新也是最后一个新版本支持xp.所以笔者使用数据库为2.0.6

项目结构:

配置说明:
Web.xml文件配置spring相关与springmvc相关.

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

      <!-- spring配置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/context/spring-context.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- spring MVC配置 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/context/servlet-context.xml</param-value>  <!--指定XML文件位置-->
        </init-param>
        <load-on-startup>4</load-on-startup>

    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

Springmvc的配置文件servlet-context.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:util="http://www.springframework.org/schema/util"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.1.xsd">

    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model -->
    <mvc:annotation-driven />

    <context:component-scan base-package="com.pudp" />

    <!-- 配置基于Session的处理,将提交上来的locale参数进行处理 -->
    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
        <!-- 该属性可以不用配置 -->
        <property name="defaultLocale" value="ja"></property>
    </bean>  

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

spring配置文件Spring-context.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:util="http://www.springframework.org/schema/util"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.1.xsd">

   <context:annotation-config />
   <context:component-scan base-package="com.pudp" />    

   <!-- 导入mongodb的配置文件 -->
   <import resource="mongodb-context.xml"/>

</beans>

mongodb的配置文件mongodb-context.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-3.0.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-3.0.xsd">  

    <!-- 加载mongodb的属性配置文件 -->
    <context:property-placeholder location="classpath:mongodb.properties" />

    <!-- 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="${mongo.hostport}">
        <!-- 一些连接属性的设置 -->
        <mongo:options
             connections-per-host="${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 dbname="database" mongo-ref="mongo" />

    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
        <constructor-arg ref="mongo" />
        <constructor-arg name="databaseName" value="db_mongo" />
    </bean>

</beans>

mongodb的属性配置文件mongodb.properties

mongo.hostport=127.0.0.1:27017
mongo.connectionsPerHost=8
mongo.threadsAllowedToBlockForConnectionMultiplier=4
#连接超时时间
mongo.connectTimeout=1000
#等待时间
mongo.maxWaitTime=1500
mongo.autoConnectRetry=true
mongo.socketKeepAlive=true
#Socket超时时间
mongo.socketTimeout=1500
mongo.slaveOk=true

编写Controller、Service、Dao相关.这里我们测试以下Spring-data-mong中对Collection的实现机制. 我们创建不同的实体类型Member、Article

然后编写对应的Service、Dao实现.这里我们侧重点持久层实现

持久层的操作实现

ArticleDao

package com.pudp.dao;

import org.springframework.stereotype.Repository;

import com.pudp.base.MongoGenDao;
import com.pudp.model.Article;

/**
 * description:
 *
 * @author <a href='mailto:dennisit@163.com'> Cn.苏若年 (En.dennisit)</a> Copy Right since 2013-10-16
 *
 * com.pudp.dao.ArticleDao.java
 *
 */

@Repository
public class ArticleDao extends MongoGenDao<Article>{

    /**
     * 实现钩子方法,返回反射的类型
     * @author <a href='mailto:dennisit@163.com'>Cn.苏若年(En.dennisit)</a> Copy Right since 2013-10-13
     *
     * @return
     */
    @Override
    protected Class<Article> getEntityClass() {
        return Article.class;
    }

}

MemberDao

package com.pudp.dao;

import org.springframework.stereotype.Repository;

import com.pudp.base.MongoGenDao;
import com.pudp.model.Member;

/**
 * description:
 *
 * @author <a href='mailto:dennisit@163.com'> Cn.苏若年 (En.dennisit)</a> Copy Right since 2013-10-13
 *
 * com.pudp.dao.MemberDao.java
 *
 */
@Repository
public class MemberDao extends MongoGenDao<Member>{

    /**
     * 实现钩子方法,返回反射的类型
     * @author <a href='mailto:dennisit@163.com'>Cn.苏若年(En.dennisit)</a> Copy Right since 2013-10-13
     *
     * @return
     */
    @Override
    protected Class<Member> getEntityClass() {
        return Member.class;
    }
}

MongoGenDao中我们实现了对库中添加数据

package com.pudp.base;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;

/**
 * description:
 *
 * @author <a href='mailto:dennisit@163.com'> Cn.苏若年 (En.dennisit)</a> Copy Right since 2013-10-13
 *
 * com.pudp.base.MongoGenDao.java
 *
 */

public abstract class MongoGenDao<T> {

    @Autowired
    protected MongoTemplate mongoTemplate;

    /**
     * 保存一个对象
     *
     * @author <a href='mailto:dennisit@163.com'>Cn.苏若年(En.dennisit)</a> Copy Right since 2013-10-13 下午03:37:28
     *
     * @param t
     * @return
     */
    public void save(T t){
        this.mongoTemplate.save(t);
    }    

    /**
     * 为属性自动注入bean服务
     *
     * @author <a href='mailto:dennisit@163.com'>Cn.pudp(En.dennisit)</a> Copy Right since 2013-10-13 下午03:21:23
     *
     * @param mongoTemplate
     */
    public void setMongoTemplate(MongoTemplate mongoTemplate) {
        this.mongoTemplate = mongoTemplate;
    }

}

这里需要说明的是MongoTemplate对库的管理。

MongoTemplate对库Collection的管理

我们使用MongoTemplate操作持久层.这里如果我们没有指定CollectionName的话,会依实体类型的类名作为库中的集合名,当我们执行数据入库操作之后,从数据库中查看到如下信息.

当然,如果我们想自己定义数据库的Collection名的化,可以在持久层Dao中指定. 关于Mongodb的可以Mongodb相关的内容. 后续将介绍SpringMVC+ Mongodb 的CRUD + 分页实现.

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