package com.net.test.mongdb.dao;

public interface IMongDaoDelete {

    public void deleteByName(String name);

    public void deleteLikeName(String name);

    public void deleteArrFirst(String name);

    public void pullDomArray(String name,String key,String value);

}

package com.net.test.mongdb.dao.imp;

import javax.annotation.Resource;

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

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

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

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

import org.springframework.data.mongodb.core.query.Update.Position;

import org.springframework.stereotype.Repository;

import com.net.test.mongdb.dao.IMongDaoDelete;

import com.net.test.mongdb.entity.User;

/**

 * @author ****

 * @Time：2017年8月4日 上午10:34:06

 * @version 1.0

 * Function: Delete

 */

@Repository

public class MongDaoDeleteImp implements IMongDaoDelete{

    @Resource

    protected MongoTemplate mongoTemplate;

    /**

     * @description 单条精确删除对象

     * @param name

     */

    @Override

    public void deleteByName(String name)

    {

        Query query = Query.query(Criteria.where("name").is(name));

        mongoTemplate.remove(query, User.class);

    }

    /**

     * @description 模糊删除对象，批量

     * @param name

     */

    @Override

    public void deleteLikeName(String name)

    {

        Query query = Query.query(Criteria.where("name").regex(name));

        mongoTemplate.remove(query, User.class);

    }

    /**

     *

     * @description 删除user元素中hobby属性数组元素的开头或者结尾，根据参数而定

     * @param name

     */

     @Override

    public void deleteArrFirst(String name)

    {

        Query query = Query.query(Criteria.where("name").is(name));

        Update update = new Update();

        update.pop("hobby", Position.FIRST);

        mongoTemplate.updateFirst(query, update, User.class);

        update.pop("hobby", Position.LAST);

        mongoTemplate.updateFirst(query, update, User.class);

    }

    /**

     * @description 根据hobby数组的具体对象值，删除对象的数组数据

     * @param name  行数据名称

     * @param key   数组键

     * @param value 数组值

     */

    @Override

    public void pullDomArray(String name,String key, String value)

    {

        Query query = new Query();

        query.addCriteria(Criteria.where("name").is(name));

        Update update = new Update();

        update.pull(key, value);

        mongoTemplate.updateFirst(query, update, User.class);

    }

}