MongoDB学习（四）SpringData与MongoDB集成

1、配置文件mongo-config.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-1.1.xsd

          http://www.springframework.org/schema/beans

          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">



    <!-- 定义mongo对象，相关ip地址和端口 -->

    <mongo:mongo host="localhost" port="27017" />

    

    <!-- mongo工厂，通过它来取得mongo实例  -->

    <mongo:db-factory dbname="mongodemo" />

    

    

    <bean id="mappingContext"

        class="org.springframework.data.mongodb.core.mapping.MongoMappingContext"></bean>



    <bean id="defaultMongoTypeMapper"

        class="org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper">

        <constructor-arg name="typeKey" value="null" />

    </bean>



    <!-- MongoMappingConverter类起到实体映射的作用，通过注释把java类转换为mongodb的文档。 -->

    <bean id="mappingMongoConverter"

        class="org.springframework.data.mongodb.core.convert.MappingMongoConverter">

        <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />

        <constructor-arg name="mappingContext" ref="mappingContext" />

        <property name="typeMapper" ref="defaultMongoTypeMapper" />

    </bean>



    <!-- mongodb的主要操作对象，所有对mongodb的增删改查的操作都是通过它完成 -->

    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">

        <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />

        <constructor-arg name="mongoConverter" ref="mappingMongoConverter" />

    </bean>



</beans>

2、实体对象User.java

View Code

public class User {

    private String uname;

    private String upwd;

    

    public User(String uname,String upwd){

        this.uname=uname;

        this.upwd=upwd;

    }

    public String getUname() {

        return uname;

    }

    public void setUname(String uname) {

        this.uname = uname;

    }

    public String getUpwd() {

        return upwd;

    }

    public void setUpwd(String upwd) {

        this.upwd = upwd;

    }

    public String toString() {

        return "[用户信息：UName:"+uname+"\tUpwd:"+upwd+"]";

    }

    

}

3、工具类MongoUtil.java

public class MongoUtil {



    static ApplicationContext ctx = new

    GenericXmlApplicationContext("mongo-config.xml");



    private static MongoOperations mongoOperations=null;

    

    /**

     * 获得MongoOperations对象（负责CRUD工作）

     * @return

     */

    public static MongoOperations getMongoOperation(){

        if(mongoOperations==null){

            mongoOperations = (MongoOperations) ctx.getBean("mongoTemplate");

        }

        return mongoOperations;

    }

    /**

     * 不定长度参数，构造查询条件

     * @param criterias

     * @return

     */

    public static Query setQuery(Criteria...criterias){

        Query query=new Query();

        

        for (int i = 0; i < criterias.length; i++) {

            query.addCriteria(criterias[i]);

        }

        return null;

        

    }

}

4、测试增删除查改CRUDTest.java

package com.archie.test;





import java.util.List;



import org.springframework.data.mongodb.core.MongoOperations;

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.archie.util.MongoUtil;

import com.archie.vo.User;



/**

 * 增删除查改测试

 * @author archie2010

 *

 * since 2013-3-22 下午04:43:39

 */

public class CRUDTest {



    public static void main(String[] args) {

        

        MongoOperations mongoOperation=MongoUtil.getMongoOperation();


        User user = new User("archie", "123");

        // 增加

        mongoOperation.save(user, "users");



        

        

        Criteria criteriaName=Criteria.where("uname").is("tom");

        Criteria criteriaPwd=Criteria.where("upwd").is("123");

        

        Query query=new Query();

        query.addCriteria(criteriaName);

        query.addCriteria(criteriaPwd);

        

        

        

        User userLogin = mongoOperation.findOne(query, User.class,

                "users");

        System.out.println(userLogin);

        

        // 查询

        User savedUser = mongoOperation.findOne(

                new Query(Criteria.where("uname").is("archie")), User.class,

                "users");





        System.out.println("savedUser : " + savedUser);



        // 更新

        mongoOperation.updateMulti(

                new Query(Criteria.where("uname").is("archie")),

                Update.update("upwd", "1111111111"), "users");



        // 查询

        User updatedUser = mongoOperation.findOne(

                new Query(Criteria.where("uname").is("archie")), User.class,

                "users");



        System.out.println("updatedUser : " + updatedUser);



        // 删除

        mongoOperation.remove(

                new Query(Criteria.where("uname").is("archie")), "users");



        // 查询集合

        List<User> listUser = mongoOperation.findAll(User.class, "users");

        System.out.println("Number of user = " + listUser.size());

        



    }



}

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