SpringDataMongoDB介绍（二）-MongoOperations介绍

MongoOperations是一个很强大的接口，有了这个接口，基本上什么都搞定了。

其介绍

Interface that specifies a basic set of MongoDB operations. Implemented by {@link MongoTemplate}. Not often used but a useful option for extensibility and testability (as it can be easily mocked, stubbed, or be the target of a JDK proxy

直接上代码

实体类

package com.chzhao.mongodbtest;

import java.util.Date;

import org.springframework.data.annotation.Id;

public class Person {

	public Person(String name, int age, Date birth) {

		this.name = name;

		this.age = age;

		this.birth = birth;

	}

	private Date birth;

	@Id

	private String id;

	public Date getBirth() {

		return birth;

	}

	public void setBirth(Date birth) {

		this.birth = birth;

	}

	public String getId() {

		return id;

	}

	public void setId(String id) {

		this.id = id;

	}

	private String name;

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public int getAge() {

		return age;

	}

	public void setAge(int age) {

		this.age = age;

	}

	private int age;

}

操作类

package com.chzhao.mongodbtest;

import static org.springframework.data.mongodb.core.query.Criteria.where;

import java.util.Date;

import java.util.List;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.joda.time.DateTime;

import org.springframework.data.mongodb.core.MongoOperations;

import org.springframework.data.mongodb.core.MongoTemplate;

import org.springframework.data.mongodb.core.query.Query;

import com.mongodb.Mongo;

public class MongoApp {

	private static final Log log = LogFactory.getLog(MongoApp.class);

	public static void main(String[] args) throws Exception {

		MongoOperations mongoOps = new MongoTemplate(new Mongo(), "zch");

		mongoOps.dropCollection(Person.class);

		mongoOps.remove(new Query(where("name").is("zhao")), Person.class);

		DateTime zhaoBirth = new DateTime(1985, 12, 13, 18, 23, 55);

		DateTime liangBirth = new DateTime(1986, 12, 13, 18, 23, 55);

		mongoOps.insert(new Person("zhao", 34, zhaoBirth.toDate()));

		mongoOps.insert(new Person("liang", 24, liangBirth.toDate()));

		List<Person> pList = mongoOps.find(new Query(where("name").is("zhao")),

				Person.class);

		for (Person p : pList) {

			log.info(p.getName() + p.getAge());

		}

		DateTime someday = new DateTime(1986, 1, 13, 18, 23, 55);

		List<Person> pList1 = mongoOps.find(new Query(where("birth").lt(someday)), Person.class);

		for (Person p : pList1) {

			log.info(p.getName() + p.getAge());

		}

	}

}

这个Query类似lambda表达式，能做很多事情，很赞。

巴特西

SpringDataMongoDB介绍（二）-MongoOperations介绍

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