spring MongoDB 集成crud操作(简单封装)

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oyhk　学习笔记

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")@Overrideprotected void setMongoTemplate(MongoTemplate mongoTemplate) {super.mongoTemplate = mongoTemplate;}@Overrideprotected 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IDprivate 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 {@Autowiredprivate 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;@Testpublic 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);}@Testpublic void findArticle() {Article a = articleService.findByid("50fd0c36bc40ceec1a44308b");System.out.println(a);}@Testpublic void update() {Map params = new HashMap();params.put("title", "修改内容...");articleService.update("50fe23e6bc402ee4051f90b8", params);}@BeforeClasspublic static void initSpring() {app = new ClassPathXmlApplicationContext(new String[] { "classpath:spring/framework-context.xml","classpath:spring/mongodb.xml" });articleService = (ArticleService) app.getBean("articleService");}}

源代码下载:mongodbtest.rar