Spring Data MongoDB hello world 示例

下面讲解如何使用spring-data-mongdb来对mongdb进行增删改查的操作

你需要的工具：

1. Spring Data MongoDB – 1.0.0.M2
2. Spring Core – 3.0.5.RELEASE
3. Java Mongo Driver – 2.5.2
4. Eclipse – 3.6
5. JDK – 1.6
6. Maven – 3.0.3

1.工程目录结构

2.依赖

你需要在pom.xml里面添加如下依赖

	<repositories>
		<repository>
			<id>spring-milestone</id>
			<name>Spring Maven MILESTONE Repository</name>
			<url>http://maven.springframework.org/milestone</url>
		</repository>
	</repositories>
 
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.8.2</version>
			<scope>test</scope>
		</dependency>
 
		<!-- Spring framework -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>3.0.5.RELEASE</version>
		</dependency>
 
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>3.0.5.RELEASE</version>
		</dependency>
 
		<!-- mongodb java driver -->
		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>mongo-java-driver</artifactId>
			<version>2.5.2</version>
		</dependency>
 
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-mongodb</artifactId>
			<version>1.0.0.M2</version>
		</dependency>
 
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>2.2</version>
		</dependency>
 
	</dependencies>
 
</project>

Annotation

需要在java文件中声明spring的mongodb注解

 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.document.mongodb.MongoTemplate;
import org.springframework.data.document.mongodb.config.AbstractMongoConfiguration;
import com.mongodb.Mongo;
 
/**
 * Spring MongoDB configuration file
 * 
 */
@Configuration
public class SpringMongoConfig extends AbstractMongoConfiguration {
 
	@Override
	public @Bean Mongo mongo() throws Exception {
 
		return new Mongo("localhost");
	}
 
	@Override
	public @Bean MongoTemplate mongoTemplate() throws Exception {
 
		return new MongoTemplate(mongo(),"yourdb","yourCollection");
	}
 
}

然后在main函数中就可以通过下面方式来获取mongodbtemplate

ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
    ApplicationContext ctx = new GenericXmlApplicationContext("mongo-config.xml");

XML

通过xml方式来配置

<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-1.0.xsd
          http://www.springframework.org/schema/beans
          http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 
	<!-- Default bean name is 'mongo' -->
	<mongo:mongo host="localhost" port="27017" />
 
	<bean id="mongoTemplate" 
                 class="org.springframework.data.document.mongodb.MongoTemplate">
		<constructor-arg ref="mongo" />
		<constructor-arg name="databaseName" value="yourdb" />
		<constructor-arg name="defaultCollectionName" value="yourCollection" />
	</bean>
 
	<!-- To translate any MongoExceptions thrown in @Repository annotated classes -->
	<context:annotation-config />
 
</beans>

ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
ApplicationContext ctx = new GenericXmlApplicationContext("mongo-config.xml");

4.定义用户模型

 
public class User {
 
	private String id;
	private String firstname;
	private String lastname;
	private int age;
 
	//getter and setter methods 
}

5.CRUD操作

 
import java.util.List;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
import org.springframework.data.document.mongodb.MongoOperations;
import org.springframework.data.document.mongodb.query.Criteria;
import org.springframework.data.document.mongodb.query.Query;
import org.springframework.data.document.mongodb.query.Update;
import com.mkyong.config.SpringMongoConfig;
import com.mkyong.user.User;
 
public class App
{
 
    public static void main( String[] args )
    {
    	//For Annotation
    	ApplicationContext ctx = new AnnotationConfigApplicationContext(SpringMongoConfig.class);
 
    	//For XML
    	//ApplicationContext ctx = new GenericXmlApplicationContext("mongo-config.xml");
 
    	MongoOperations mongoOperation = (MongoOperations)ctx.getBean("mongoTemplate");
 
        User user = new User("1001", "yong", "mook kim", 30);
 
        //save
        mongoOperation.save("userprofile",user);
 
        //find
        User savedUser = mongoOperation.findOne("userprofile",
        		new Query(Criteria.where("id").is("1001")),
				User.class);
 
        System.out.println("savedUser : " + savedUser);
 
        //update
        mongoOperation.updateFirst("userprofile",
        		new Query(Criteria.where("firstname").is("yong")), 
        		Update.update("lastname", "new lastname"));
 
        //find
        User updatedUser = mongoOperation.findOne("userprofile",
        		new Query(Criteria.where("id").is("1001")),
				User.class);
 
        System.out.println("updatedUser : " + updatedUser);
 
        //delete
        mongoOperation.remove("userprofile",
        		new Query(Criteria.where("id").is("1001")),
        		User.class);
 
        //List
        List<User> listUser =  
        	mongoOperation.getCollection("userprofile", User.class);
        System.out.println("Number of user = " + listUser.size());
 
    }
 
}

输出：

savedUser : User [id=1001, firstname=yong, lastname=mook kim, age=30]
updatedUser : User [id=1001, firstname=yong, lastname=new lastname, age=30]
Number of user = 0

参考：http://www.mkyong.com/mongodb/spring-data-mongodb-hello-world-example/