MongoTemplate进行增删改查

原文链接： https://blog.csdn.net/sinat_35821285/article/details/83511203

注入

@Autowired
private MongoTemplate mongoTemplate;

插入数据（可以是一个对象，或者是一个对象集合）

User user = new User(12,"1","黄小飞","18888888888");
mongoTemplate.insert(user, "user");

List<User> userList = new ArrayList<>();
userList.add(new User(11,"1","白小飞","18888888888"));
userList.add(new User(9,"1","白敬亭","13333333333"));
userList.add(new User(5,"1","林宥嘉","14444444444"));
userList.add(new User(6,"1","彭于晏","15555555555"));
userList.add(new User(7,"1","周杰伦","16666666666"));
mongoTemplate.insert(userList, "user");

当存入的第一个数据类型是User，名字是user的时候，第二个存入数据就必须是User类型的数据。

查询数据

查询单个数据和多个数据，模糊查询：

//查询单个数据
public User findMongo() {
	Pattern pattern = Pattern.compile("^.*8$",Pattern.CASE_INSENSITIVE);
	Query query = new Query(Criteria.where("phone").regex(pattern));
	User findOne = mongoTemplate.findOne(query,User.class,"user");
	return findOne;
}

//查询多个数据
public List<User> findListMongo() {
	//模糊查询以 ^开始 以$结束 .*相当于Mysql中的%
	Pattern pattern = Pattern.compile("^1.*$",Pattern.CASE_INSENSITIVE);
	Query query = new Query(Criteria.where("phone").regex(pattern));
	//Query query = new Query(Criteria.where("status").is("1"));
	//query.with(new Sort(Direction.DESC,"phone"));  //按手机号码倒序
	 List<User> findList = mongoTemplate.find(query,User.class,"user");
	return findList;
}

多个条件查询：

//多个条件查询(格式1)
public List<User> findList(){
	Query query = new Query();
	query.addCriteria(Criteria.where("name").is("秦岚"));
	query.addCriteria(Criteria.where("phone").is("12222222222"));
	List<User> findList = mongoTemplate.find(query, SysUser.class,"user");
	return findList;
}
//多个条件查询(格式2)
public List<User> findList2(){
	Criteria criteria = new Criteria();
	criteria.and("name").is("秦岚");
	criteria.and("phone").is("12222222222");
	Query query = new Query(criteria);
	List<User> findList = mongoTemplate.find(query, SysUser.class,"user");
	return findList;
}

//一个模糊关键字匹配多个字段
public List<User> findList3(){
		
	Pattern pattern = Pattern.compile("^.*222$",Pattern.CASE_INSENSITIVE);
	Criteria  criteria = new Criteria();
	//phone以222结尾的 或者 name以222结尾的  
	criteria.orOperator(Criteria.where("phone").regex(pattern),
	Criteria.where("name").regex(pattern));
	//同时满足 phone以222结尾的，和name以222结尾的
    criteria.andOperator(Criteria.where("phone").regex(pattern),
	Criteria.where("name").regex(pattern));
		
	Query query = new Query(criteria);
	List<SysUser> find = mongoTemplate.find(query, SysUser.class,"user");
	return find;
}

更新

//更新
public int update() {
	Query query = new Query(); 
	//_id区分引号 "1"和1
	query.addCriteria(Criteria.where("_id").is(1));
	Update update = Update.update("name", "zzzzz");
	//查询到的全部更新
	//WriteResult upsert = mongoTemplate.updateMulti(query, update, "user");
	//查询更新第一条
	//WriteResult upsert = mongoTemplate.updateFirst(query, update, "user");
	//有则更新，没有则新增
	WriteResult upsert = mongoTemplate.upsert(query, update, "user");      
	//返回执行的条数
	return upsert.getN();
}

//添加内嵌文档数据（有则直接加入，没有则进行新增）
public int update1() {
	Query query = Query.query(Criteria.where("_id").is("11"));
	SysUser user = new SysUser(1,"1","lisi","19999998745");
	Update update = new Update();
	update.addToSet("users", user);
	WriteResult upsert = mongoTemplate.upsert(query, update, "user");
	return upsert.getN();
}
	
//修改内嵌文档中数据
public int update2() {
	//查询_id为11并且其中userList文档的_id为1的
	Query query = Query.query(Criteria.where("_id").is("11").and("users._id").is(1));
	Update update = Update.update("users.$.name", "zhangsan");
	WriteResult upsert = mongoTemplate.upsert(query, update, "user");
	return upsert.getN();
}

//删除内嵌文档中数据
	public int delete() {
	//查询_id为11并且其中userList文档的_id为1的
	Query query = Query.query(Criteria.where("_id").is("11").and("users._id").is(1));
	Update update = new Update();
	update.unset("users.$");
	WriteResult upsert = mongoTemplate.updateFirst(query, update, "user");
	return upsert.getN();
}

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版权声明：本文为CSDN博主「oh_EJiao」的原创文章，遵循CC 4.0 by-sa版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/sinat_35821285/article/details/83511203