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MongoDB操作示例

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本文介绍了一个使用Spring Data MongoDB进行数据库操作的Java类，包括增删改查等基本功能。

package com.mongo.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.data.mongodb.core.query.Update;
import org.springframework.stereotype.Component;

import com.mongo.dto.Num;
import com.mongo.dto.Student;

@Component
public class StudentDao {
    @Autowired
    private MongoTemplate mongo;

    public List<Student> findStudentList() {
        return mongo.find(new Query(), Student.class);
    }

    public List<Num> findNumList() {
        return mongo.find(new Query(), Num.class);
    }

    public void add(Student student) {
        mongo.insert(student);
    }

    public void del(Student student) {
        mongo.remove(new Query(Criteria.where("name").is(student.getName())),Student.class);
    }

    public Student getStudent(Student student) {
        return mongo.findOne(new Query(Criteria.where("name").is(student.getName())), Student.class);
    }

    public void update(Student student) {
        System.out.println(student.getId());
        Update update = new Update();
        update.set("name", student.getName());
        update.set("age", student.getAge());
        update.set("sex", student.getSex());
        update.set("num", student.getNum());
        mongo.updateFirst(new Query(Criteria.where("id").is(student.getId())), update, Student.class);
    }


}