MongoDB學習（四）SpringData與MongoDB整合

1、設定檔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/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsdhttp://www.springframework.org/schema/data/mongohttp://www.springframework.org/schema/data/mongo/spring-mongo-1.1.xsdhttp://www.springframework.org/schema/beans          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">    <!-- 定義mongo對象，相關ip地址和連接埠 -->    <mongo:mongo host="localhost" port="27017" />        <!-- mongo工廠，通過它來取得mongo執行個體  -->    <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類起到實體映射的作用，通過注釋把java類轉換為mongodb的文檔。 -->    <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的主要操作對象，所有對mongodb的增刪改查的操作都是通過它完成 -->    <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、實體物件User.java

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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 "[使用者資訊：UName:"+uname+"\tUpwd:"+upwd+"]";    }    }

3、工具類MongoUtil.java

public class MongoUtil {    static ApplicationContext ctx = new    GenericXmlApplicationContext("mongo-config.xml");    private static MongoOperations mongoOperations=null;        /**     * 獲得MongoOperations對象（負責CRUD工作）     * @return     */    public static MongoOperations getMongoOperation(){        if(mongoOperations==null){            mongoOperations = (MongoOperations) ctx.getBean("mongoTemplate");        }        return mongoOperations;    }    /**     * 不定長度參數，構造查詢條件     * @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、測試增刪除查改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;/** * 增刪除查改測試 * @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);                // 查詢        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");        // 查詢        User updatedUser = mongoOperation.findOne(                new Query(Criteria.where("uname").is("archie")), User.class,                "users");        System.out.println("updatedUser : " + updatedUser);        // 刪除        mongoOperation.remove(                new Query(Criteria.where("uname").is("archie")), "users");        // 查詢集合        List<User> listUser = mongoOperation.findAll(User.class, "users");        System.out.println("Number of user = " + listUser.size());            }}

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