package edu.nju.dao; import edu.nju.entities.Job; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.mongodb.core.MongoOperations; import org.springframework.data.mongodb.core.query.Criteria; import org.springframework.data.mongodb.core.query.Query; import org.springframework.stereotype.Repository; import java.util.List; @Repository public class JobDao { @Autowired private MongoOperations mongoOperations; //id查询,find查询所有 public Job findJob(String id){ Query query = new Query(); query.addCriteria(Criteria.where("_id").is(id)); List list = mongoOperations.find(query,Job.class); if(list.size() == 0 || list == null) {return null;} return list.get(0); } }