maven依賴

 <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-mongodb</artifactId>
            <version>1.10.7.RELEASE</version>
        </dependency>

這裡 只需要 spring-data-mongodb不需要mongo-java-driver 不然在注入MongoRepository的實現類時會出現建構函式問題

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'orderController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: orders.db.OrderRepository orders.web.OrderController.orderdb; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'orderRepository': Could not resolve matching constructor (hint: specify index/type/name arguments for simple parameters to avoid type ambiguities)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4971)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
 

然後java配置類

@Configuration
@EnableMongoRepositories(basePackages="orders.db") //繼承MongoRepository介面的介面所在包
@ComponentScan("orders")
public class MongoConfig 
extends AbstractMongoConfiguration
{

	
	
	@Override
	protected String getDatabaseName() {
		// TODO Auto-generated method stub
		
		return "OrdersDB";
	}

	@Override

	public Mongo mongo() throws Exception {
		// TODO Auto-generated method stub
		return new MongoClient();
	}
	

}
 

介面

package orders.db;

import org.springframework.data.mongodb.repository.MongoRepository;

public interface OrderRepository extends MongoRepository<Order, String> {

}

模型，至少@Document宣告實體類相當於jpa中的@Entity,@Id宣告主鍵

package orders.db;

import java.util.Collection;
import java.util.LinkedHashSet;

import javax.persistence.Id;

import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.Field;

import orders.model.Item;

/*import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.Field;*/

@Document
public class Order {
	@Id
private String id;
	@Field("client")
	private String customer;
	private String type;
	
	private Collection<Item> items=new LinkedHashSet<>();

	public Order() {
		super();
		// TODO Auto-generated constructor stub
	}

	public String getCustomer() {
		return customer;
	}

	public void setCustomer(String customer) {
		this.customer = customer;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public Collection<Item> getItems() {
		return items;
	}

	public void setItems(Collection<Item> items) {
		this.items = items;
	}

	public String getId() {
		return id;
	}

	@Override
	public String toString() {
		return "Order [id=" + id + ", customer=" + customer + ", type=" + type + ", items=" + items + "]";
	}


	
}

然後注入即可

@Autowired()

	OrderRepository orderdb;