Mongodb整合Spring示例_mongo jpa findone-优快云博客

本文介绍如何使用Spring Data MongoDB进行数据库操作，包括配置、实体类定义、DAO接口及测试方法。

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Mongodb整合Spring

参照Spring官方文档中Spring-data-mongodb对Mongodb的操作，做了一个简单的示例，以防遗忘。

文档地址：http://docs.spring.io/spring-data/data-mongodb/docs/1.4.0.RELEASE/reference/html/

Maven-3.1.1 Mongodb-2.4.8 Eclipse

在Eclipse中创建一个Maven项目，pom.xml内容如下：

<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>lee.forum</groupId>
	<artifactId>Forum1.0.1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<!--========================================================== -->
		<!--======================= 测试 ========================== -->
		<!--========================================================== -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.8.2</version>
			<scope>test</scope>
		</dependency>
		<!--=========================================================== -->
		<!--======================= Spring ========================== -->
		<!--=========================================================== -->
		<!-- Spring-data -->
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-mongodb</artifactId>
			<version>1.3.4.RELEASE</version>
		</dependency>
		<!-- Spring core beans tx context expression test -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-expression</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>3.2.8.RELEASE</version>
		</dependency>
		<!--=========================================================== -->
		<!--======================== Mongodb ========================== -->
		<!--=========================================================== -->
		<dependency>
			<groupId>org.mongodb</groupId>
			<artifactId>mongo-java-driver</artifactId>
			<version>2.11.4</version>
		</dependency>
		<!--=========================================================== -->
		<!--======================== Logs ========================== -->
		<!--=========================================================== -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.1</version>
		</dependency>
	</dependencies>
	<repositories>
		<repository>
			<id>spring-milestone</id>
			<name>Spring Maven MILESTONE Repository</name>
			<url>http://repo.spring.io/libs-milestone</url>
		</repository>
	</repositories>

</project>

Spring配置文件安如下：

<?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"
	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
	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
	http://www.springframework.org/schema/data/jpa 
	http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
	
	<context:annotation-config />
	
	<context:component-scan base-package="lee.forum" />
	
	<mongo:repositories base-package="lee.forum.core.dao" />
	
	<!-- Default bean name is 'mongo' -->
	<mongo:mongo host="localhost" port="27017"/>
    
	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
		<constructor-arg ref="mongo"/>
		<constructor-arg name="databaseName" value="forum"/>
	</bean>

</beans>

forum为数据库名称，如果不存在则会自动创建。lee.forum.core.dao为dao的所在包名，这个例子的dao继承了MongoRepository，只需要按照规则写接口就行了。后面将会看到。

实体类：

package lee.forum.core.entity;

import java.util.Date;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document
public class User {

	@Id
	private String userId;
	private String userName;
	private String email;
	private String sex;
	private Date birthday;

	public String getUserId() {
		return userId;
	}

	public void setUserId(String userId) {
		this.userId = userId;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public Date getBirthday() {
		return birthday;
	}

	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}

}

Dao接口：

package lee.forum.core.dao;

import java.util.List;

import lee.forum.core.entity.User;

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

public interface UserRepository extends MongoRepository<User, String> {

	public List<User> findByEmail(String email);

	public User findOneByUserId(String userId);

}

这个接口不需要实现类，但是方法的名称必须按照Spring的规则来写。这里只写了查询，更详细的用法请参考文档。

find表示查询，by后面是查询的条件，email是User的属性，这样Spring才知道你要做什么。

测试类：

package lee.forum.test.dao;

import lee.forum.core.dao.UserRepository;
import lee.forum.core.entity.User;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:applicationContext-data.xml" })
public class RespositoryTest {

	@Autowired
	private UserRepository userRepository;

	@Test
	public void findAll() {
		for (User user : userRepository.findAll()) {
			System.out.println(user.getEmail());
		}
	}

	@Test
	public void findByEmail() {
		for (User user : userRepository.findByEmail("libinsbox@137.com")) {
			System.out.println(user.getUserName());
		}
	}

	@Test
	public void findById() {

		System.out.println(userRepository.findOneByUserId("libinsbox@138.com")
				.getUserName());

	}

}