1.自定义Repository方式

1.1pom.xml配置

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

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1.2项目目录

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1.3User.java

package com.shuai.spring_boot_1.domain;

import org.springframework.data.annotation.Id;

public class User {
    
    //id属性是给mongodb用的，用@Id注解修饰
    @Id
    private String id;
    private String name;
    private int age;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
    }

}

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1.4UserRepository.java

package com.shuai.spring_boot_1.dao;

import org.springframework.data.mongodb.repository.MongoRepository;

import com.shuai.spring_boot_1.domain.User;

public interface UserRepository extends MongoRepository<User, String> {
    User findByName(String name);
}

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1.5OneController.java

package com.shuai.spring_boot_1.web;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.shuai.spring_boot_1.dao.UserRepository;
import com.shuai.spring_boot_1.domain.User;

@RestController
public class OneController {
    
    @Autowired
    UserRepository userRepository;
    
    @RequestMapping("/save")
    public String save(){
        
        User user = new User();
        user.setId("1");
        user.setName("张三");
        user.setAge(10);
        userRepository.save(user);
        
        System.out.println("保存成功");
        return "ok";
    }
    
    @RequestMapping("/find")
    public String find(){
        List<User> findAll = userRepository.findAll();
        System.out.println(findAll);
        return "ok";
    }
    
    @RequestMapping("/findByName")
    public String findByName(){
        User findByName = userRepository.findByName("张三");
        System.out.println(findByName);
        return "ok";
    }
    
    
}

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1.6App.java

package com.shuai.spring_boot_1;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App {
    
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

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1.7运行项目

运行App.java中的main方法

1.8访问项目

http://localhost:8080/save  保存
http://localhost:8080/find   获取全部
http://localhost:8080/findByName  通过名字获得