springboot整合mongodb增删改查入门

• ​​1.配置与依赖​​
• ​​2.实体与repository层​​
• ​​3.测试​​

适合新手。

要求：安装好mongodb

代码和运行程序如下：

目录：

1.配置与依赖

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

spring.data.mongodb.uri=mongodb://127.0.0.1:27017/test

2.实体与repository层

public class User implements Serializable {
        private static final long serialVersionUID = -3258839839160856613L;
        private Long id;
        private String userName;
        private String passWord;

        public Long getId() {
                return id;
        }

        public void setId(Long id) {
                this.id = id;
        }

        public String getUserName() {
                return userName;
        }

        public void setUserName(String userName) {
                this.userName = userName;
        }

        public String getPassWord() {
                return passWord;
        }

        public void setPassWord(String passWord) {
                this.passWord = passWord;
        }

        @Override
        public String toString() {
                return "UserEntity{" +
                        "id=" + id +
                        ", userName='" + userName + '\'' +
                        ", passWord='" + passWord + '\'' +
                        '}';
        }
}

Repository

public interface UserRepository {

    public void saveUser(User user);

    public User findUserByUserName(String userName);

    public long updateUser(User user);

    public void deleteUserById(Long id);

}

接口实现类

package com.neo.repository.impl;

import com.mongodb.client.result.UpdateResult;
import com.neo.repository.UserRepository;
import com.neo.model.User;
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;

/**
 * Created by summer on 2017/5/5.
 */
@Component
public class UserRepositoryImpl implements UserRepository {

    @Autowired
    private MongoTemplate mongoTemplate;

    /**
     * 创建对象
     * @param user
     */
    @Override
    public void saveUser(User user) {
        mongoTemplate.save(user);
    }

    /**
     * 根据用户名查询对象
     * @param userName
     * @return
     */
    @Override
    public User findUserByUserName(String userName) {
        Query query=new Query(Criteria.where("userName").is(userName));
        User user =  mongoTemplate.findOne(query , User.class);
        return user;
    }

    /**
     * 更新对象
     * @param user
     */
    @Override
    public long updateUser(User user) {
        Query query=new Query(Criteria.where("id").is(user.getId()));
        Update update= new Update().set("userName", user.getUserName()).set("passWord", user.getPassWord());
        //更新查询返回结果集的第一条
        UpdateResult result =mongoTemplate.updateFirst(query,update,User.class);
        //更新查询返回结果集的所有
        // mongoTemplate.updateMulti(query,update,UserEntity.class);
        if(result!=null)
            return result.getMatchedCount();
        else
            return 0;
    }

    /**
     * 删除对象
     * @param id
     */
    @Override
    public void deleteUserById(Long id) {
        Query query=new Query(Criteria.where("id").is(id));
        mongoTemplate.remove(query,User.class);
    }
}

3.测试

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

    @Autowired
    private UserRepository userDao;

    @Test
    public void testSaveUser() throws Exception {
        User user=new User();
        user.setId(2l);
        user.setUserName("小明");
        user.setPassWord("fffooo123");
        userDao.saveUser(user);
    }

    @Test
    public void findUserByUserName(){
       User user= userDao.findUserByUserName("小明");
       System.out.println("user is "+user);
    }

    @Test
    public void updateUser(){
        User user=new User();
        user.setId(2l);
        user.setUserName("天空");
        user.setPassWord("fffxxxx");
        userDao.updateUser(user);
    }

    @Test
    public void deleteUserById(){
        userDao.deleteUserById(1l);
    }

}

运行testSaveUser

更新：