spring MongoDB 集成crud操作(简单封装)，mongodbcrud,这两天一直在学习mong

spring MongoDB 集成crud操作(简单封装)，mongodbcrud,这两天一直在学习mong

这两天一直在学习mongodb,由于我的博客网站想把mysql替换成mongodb,为什么会有这样的冲动,我通过收集一些资料,关于mongodb 跟 mysql 的对比...发现性能上mongodb比上mysql是高出很多倍...无论是增,删,修,查的操作.....都比mysql效率好...但是,我也看到,mongodb是文档型数据库...做一些高级查询的时候就可能产生麻烦了..特别是做银行的数据操作时,如果出错..没得事务回滚...这些都是比较严重的问题...

分析过博客网站这整个系统,觉得还是比较适合用mongodb...对于一些表与表的关联查询,我可以用程序上去解决(这部分可能就麻烦了些,不过没关系)...所以我决定使用mongodb

下面:spring MongoDB 集成crud操作(简单封装)　开始正题了,同样也是pom.xml首先把项目的依赖都管理好,这次一样用junit用来做action的动作触发,看看项目结构图:

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.mkfree</groupId>    <artifactId>Mongodb</artifactId>    <version>0.0.1-SNAPSHOT</version>    <dependencies>        <dependency>            <groupId>org.springframework.data</groupId>            <artifactId>spring-data-mongodb</artifactId>            <version>1.0.3.RELEASE</version>        </dependency>        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.6</version>        </dependency>    </dependencies>    <repositories>        <repository>            <id>spring-release</id>            <name>Spring Maven Release Repository</name>            <url>http://repo.springsource.org/libs-release</url>        </repository>    </repositories></project>

spring 配置文件:

mongodb.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-3.1.xsdhttp://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.1.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">    <!-- Default bean name is 'mongo' -->    <mongo:mongo host="127.0.0.1" port="27017" />    <mongo:db-factory dbname="database" mongo-ref="mongo" />    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">        <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />        <!-- <constructor-arg name="mongoConverter" ref="mappingConverter" /> -->    </bean></beans>

framework-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: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/aop http://www.springframework.org/schema/aop/spring-aop-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/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">    <!-- 扫描注解Bean -->    <context:component-scan base-package="com.mkfree.**.service">        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />    </context:component-scan>    <context:component-scan base-package="com.mkfree.**.dao">        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />    </context:component-scan></beans>

这样就配置成功了..看下面的java代码

MongodbBaseDao.java

package com.mkfree.framework.common.mongodb;import java.util.List;import org.springframework.data.mongodb.core.MongoTemplate;import org.springframework.data.mongodb.core.query.Query;import org.springframework.data.mongodb.core.query.Update;public abstract class MongodbBaseDao{    /**     * spring mongodb　集成操作类　     */    protected MongoTemplate mongoTemplate;    /**     * 通过条件查询实体(集合)     *      * @param query     */    public Listfind(Query query) {        return mongoTemplate.find(query, this.getEntityClass());    }    /**     * 通过一定的条件查询一个实体     *      * @param query     * @return     */    public T findOne(Query query) {        return mongoTemplate.findOne(query, this.getEntityClass());    }    /**     * 通过条件查询更新数据     *      * @param query     * @param update     * @return     */    public void update(Query query, Update update) {        mongoTemplate.upsert(query, update, this.getEntityClass());    }    /**     * 保存一个对象到mongodb     *      * @param bean     * @return     */    public T save(T bean) {        mongoTemplate.save(bean);        return bean;    }    /**     * 通过ID获取记录     *      * @param id     * @return     */    public T get(String id) {        return mongoTemplate.findById(id, this.getEntityClass());    }    /**     * 通过ID获取记录,并且指定了集合名(表的意思)     *      * @param id     * @param collectionName     *            集合名     * @return     */    public T get(String id, String collectionName) {        return mongoTemplate.findById(id, this.getEntityClass(), collectionName);    }    /**     * 获取需要操作的实体类class     *      * @return     */    protected abstract ClassgetEntityClass();    /**     * 注入mongodbTemplate     *      * @param mongoTemplate     */    protected abstract void setMongoTemplate(MongoTemplate mongoTemplate);}

ArticleDao.java

package com.mkfree.blog.dao;import static org.springframework.data.mongodb.core.query.Criteria.where;import static org.springframework.data.mongodb.core.query.Query.query;import static org.springframework.data.mongodb.core.query.Update.update;import java.util.Map;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;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.stereotype.Repository;import com.mkfree.blog.domain.Article;import com.mkfree.framework.common.mongodb.MongodbBaseDao;/** * ＤＡＯ层操作类 *  * @author oyhk *  *         2013-1-21下午1:57:14 */@SuppressWarnings("static-access")@Repository("ArticleDao")public class ArticleDao extends MongodbBaseDao{    /**     * 通过条件去查询     *      * @return     */    public Article findOne(Map params) {        Query query = new Query();        Criteria criteria = new Criteria();        criteria.where("id").is(params.get("id"));        query.addCriteria(criteria);        return super.findOne(query);    }    /**     * 暂时通过ＩＤ去修改title     *      * @param id     * @param params     */    public void updateEntity(String id, Map params) {        super.updateEntity(query(where("id").is(id)), update("title", params.get("title")));    }    @Autowired    @Qualifier("mongoTemplate")    @Override    protected void setMongoTemplate(MongoTemplate mongoTemplate) {        super.mongoTemplate = mongoTemplate;    }    @Override    protected ClassgetEntityClass() {        return Article.class;    }}

Article.java

package com.mkfree.blog.domain;/** * 博客实体类 *  * @author hk 2012-11-1 下午10:55:38 */public class Posts {    private String id;// 博客ID    private String title;// 博客标题    private String content;// 博客内容    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getContent() {        return content;    }    public void setContent(String content) {        this.content = content;    }}

ArticleService.java

package com.mkfree.blog.service;import java.util.Map;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.mkfree.blog.dao.ArticleDao;import com.mkfree.blog.domain.Article;@Service("articleService")public class ArticleService {    @Autowired    private ArticleDao articleDao;    public Article findByid(String id) {        return (Article) articleDao.get(id);    }    public Article findOne(Map params) {        return this.articleDao.findOne(params);    }    public Article save(Article bean) {        return (Article) articleDao.save(bean);    }    /**     * 暂时只是固定去修改,会有下一篇博客,写高级修改...     */    public void update(String id, Map params) {        this.articleDao.updateEntity(id, params);    }}

ArticleController.java

package com.mkfree.blog.action;import java.util.HashMap;import java.util.Map;import org.junit.BeforeClass;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.mkfree.blog.domain.Article;import com.mkfree.blog.service.ArticleService;public class ArticleController {    private static ApplicationContext app;    private static ArticleService articleService;    @Test    public void save() {        Article a = new Article();        a.setTitle("mongodb开始实战");        a.setContent("mongodb开始实战..内容");        articleService.save(a);        System.out.println(a);    }    @Test    public void findArticle() {        Article a = articleService.findByid("50fd0c36bc40ceec1a44308b");        System.out.println(a);    }    @Test    public void update() {        Map params = new HashMap();        params.put("title", "修改内容...");        articleService.update("50fe23e6bc402ee4051f90b8", params);    }    @BeforeClass    public static void initSpring() {        app = new ClassPathXmlApplicationContext(new String[] { "classpath:spring/framework-context.xml",                "classpath:spring/mongodb.xml" });        articleService = (ArticleService) app.getBean("articleService");    }}