Spring4分别整合mongo2.X和3.0

1.pom文件添加：

<dependency>
    <groupId>org.mongodb</groupId>
     <artifactId>mongo-java-driver</artifactId>
     <version>2.14.2</version>
</dependency>

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.7.2.RELEASE</version>
</dependency>

2.Spring配置文件的头信息，其中只需关注mongo的三行就行：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"

    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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/data/mongo
        http://www.springframework.org/schema/data/mongo/spring-mongo.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        ">

　　　　 <mongo:mongo-client host="172.16.10.247" port="27017" id="mongo">  
          <mongo:client-options write-concern="SAFE"/>  
    　　</mongo:mongo-client>  
      
    　　<mongo:db-factory  id="mongoDbFactory" dbname="db_mongo" mongo-ref="mongo" />  //注释，这句为了说明有账号密码而已，实际项目中没有这句<mongo:db-factory dbname="db_mongo" mongo-ref="mongo" username="qqw_reward" password="Reward_New001"/>  

    　　<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">  
      　　<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />  
    　　</bean> 
</beans>

3.DAO层代码：

package com.companyname.publicbase.dao;

import java.util.List;

import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;

public interface BaseMongoDao {

    public <T> List<T> find(Class<T> clazz); 

    public <T> T findOne(Query query, Class<T> clazz);

    public <T> void update(Query query, Update update, Class<T> T);

    //批量更新
    public <T> void updatemulti(Query query, Update update, Class<T> clazz); 

    public <T> void save(T entity);

    public <T> T findById(String id, Class<T> clazz);

    public <T> long count(Query query, Class<T> clazz);

    public <T> void remove(Query query, Class<T> clazz);
}

4.DAO实现类的代码：

package com.companyname.publicbase.dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

@Repository
@Transactional(rollbackFor=Exception.class)
public class BaseMongoDaoImpl<T>{  

    /*@Resource
    MongoTemplate mongoTemplate;
    public List<T> find(Query query, Class<T> clazz) {
        return (List<T>) mongoTemplate.find(query, clazz);
    }*/

    @Resource
    private MongoTemplate mongoTemplate;
    public List<T> find(Query query, Class<T> clazz) {
        System.out.println(mongoTemplate);
        return (List<T>) mongoTemplate.find(query, clazz);
    } 

     /**
     * spring mongodb　集成操作类　
     */
    /*@Autowired private MongoTemplate mongoTemplate;  

    public List<T> find(Query query, Class<T> clazz) {
        return (List<T>) mongoTemplate.find(query, clazz);
    } */

    /*public T findOne(Query query, Class<T> clazz) {
        return (T) mongoTemplate.findOne(query, clazz);
    } 

    public void update(Query query, Update update, Class<T> clazz) {
        mongoTemplate.findAndModify(query, update, clazz);
    } 

    //批量更新
    public void updatemulti(Query query, Update update, Class<T> clazz) {
        mongoTemplate.updateMulti(query, update, clazz);
    } 

    public void save(T entity) {
        mongoTemplate.insert(entity);
    }  

    public T findById(String id, Class<T> clazz) {
        return (T) mongoTemplate.findById(id, clazz);
    }  

    public long count(Query query, Class<T> clazz){
        return mongoTemplate.count(query, clazz);
    }  

    public void remove(Query query, Class<T> clazz){
         mongoTemplate.remove(query,  clazz);
    }
*/
} 

这样Spring4整合mongo3.X就结束了，如果报这个异常：NoClassDefFoundError: org/springframework/objenesis/ObjenesisStd，

就说明你用的不是spring4.x，到此恭喜你已经整合完毕了。

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下面就是整合mongo2.x的内容了，这个spring3.2起码是没有问题的，来！下面开始整理:

1.pom文件：

   <dependency>
      <groupId>org.mongodb</groupId>
      <artifactId>mongo-java-driver</artifactId>
      <version>2.12.4</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-mongodb</artifactId>
      <version>1.6.1.RELEASE</version>
    </dependency>

2.Spring文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"

    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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.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/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        ">

　<mongo:mongo host="172.16.10.247" port="27017"/>
  <mongo:db-factory dbname="db_mongo" mongo-ref="mongo" username="qqw_reward" password="Reward_New001"/>

  <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
  </bean>
</beans>

3.java调用就跟上面一样了，dao和实现类都是一样的，就这样两套都整理完了，有什么要完善的再回来改，之前测试过是没有问题的，百分百能跑，

也可以看看这个怎么写的http://blog.csdn.net/chenpy/article/details/50458787