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。