使用Java怎么连接MongoDB数据库并进行增删改查操作

package com.dao;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;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.stereotype.Repository;import com.bean.Company;@Repositorypublic class RepositoryImpl implements AbstractRepository {  @Autowired  private MongoTemplate mongoTemplate;  // 查询所有数据  public List<&#63;> findAll(Class<&#63;> entity) {    return mongoTemplate.findAll(entity);  }  // 更新数据  public Company findOne(String id, Class<&#63;> entity) {    return (Company) mongoTemplate.findOne(new Query(Criteria.where("id")        .is(id)), entity);  }  // 添加到数据库  public void updateEntity(Company company) {    mongoTemplate.save(company);  }  // 删除选中的数据  public void delete(String id, Class<Company> class1) {    Criteria criteria = Criteria.where("id").in(id);    if (criteria != null) {      Query query = new Query(criteria);      if (query != null && mongoTemplate.findOne(query, class1) != null)        mongoTemplate.remove(mongoTemplate.findOne(query, class1));    }  }  //增加到数据库  public void insert(Company company) {    mongoTemplate.insert(company);      }}