SpringBoot操作MongoDB实现增删改查

SpringBoot操作MongoDB实现增删改查
本篇博客主讲如何使用SpringBoot操作MongoDB。

SpringBoot操作MongoDB实现增删改查

（1）pom.xml引入依赖

 <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> 

（2）创建application.yml

spring:
data:

mongodb: host: 192.168.72.129 database: studentdb 

（3）创建实体类
创建包com.changan.mongodb，包下建包pojo 用于存放实体类，创建实体类

package com.changan.mongdb.pojo;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

import java.io.Serializable;

@Document(collection = "student")
public class Student implements Serializable {

@Id private Long id; private String name; private String sex; private String age; private String introduce; public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getIntroduce() { return introduce; } public void setIntroduce(String introduce) { this.introduce = introduce; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Long getId() { return id; } public void setId(Long id) { this.id = id; }

}

（4）创建数据访问接口
com.changan.mongodb包下创建dao包，包下创建接口

package com.changan.mongdb.dao;

import com.changan.mongdb.pojo.Student;

import java.util.List;
import java.util.Map;

public interface StudentDao {

void save(Student student); void update(Student student); List<Student> findAll(); void delete(Integer id);

}

（5）创建业务逻辑类
com.changan.mongodb包下创建impl包，包下创建类

package com.changan.mongdb.dao.impl;

import com.changan.mongdb.dao.StudentDao;
import com.changan.mongdb.pojo.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.LookupOperation;
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 java.util.List;

@Component
public class StudentDaoImpl implements StudentDao {

@Autowired private MongoTemplate mongoTemplate; /** * 新增信息 * @param student */ @Override public void save(Student student) { mongoTemplate.save(student); } /** * 修改信息 * @param student */ @Override public void update(Student student) { //修改的条件 Query query = new Query(Criteria.where("id").is(student.getId())); //修改的内容 Update update = new Update(); update.set("name",student.getName()); mongoTemplate.updateFirst(query,update,Student.class); } /** * 查询所有信息 * @return */ @Override public List<Student> findAll() { return mongoTemplate.findAll(Student.class); } /** * 根据id查询所有信息 * @param id */ @Override public void delete(Integer id) { Student byId = mongoTemplate.findById(1,Student.class); mongoTemplate.remove(byId); } 

}

（6）创建测试类

package com.changan.mongdb;

import com.changan.mongdb.dao.StudentDao;
import com.changan.mongdb.pojo.Student;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest
public class MongdbApplicationTests {

@Autowired private StudentDao studentDao; /** * 查询所有信息 */ @Test public void findAll() { List<Student> all = studentDao.findAll(); System.out.println(all.size()); } /** * 新增信息 */ @Test public void save() { Student student = new Student(); student.setId(6l); student.setName("宋人头"); studentDao.save(student); } /** * 修改信息 */ @Test public void update() { Student student = new Student(); student.setId(2l); student.setName("吴很帅"); studentDao.update(student); } /** * 删除信息 */ @Test public void delete() { studentDao.delete(3); }

}

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作者：丢了微笑该如何释怀
来源：CSDN
原文：https://blog.csdn.net/weixin_42236165/article/details/91884029
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