Spring Data提供了对mongodb数据访问的支持，我们只需要继承MongoRepository类

前面的基础流程应用依赖，创建实体类参考下这篇文章参考文本

1.创建接口继承MongoRepository

package com.example.mongodb.repository;

import com.example.mongodb.entity.Student;
import org.springframework.data.mongodb.repository.MongoRepository;

public interface StudentRespostiory extends MongoRepository <Student,String>{
}

然后我们在测试类中注入StudentRepository调用 MongoRepository类封装好的方法

2.添加记录方法

  @Test
    public void create(){
         Student student=new Student();
         student.setName("mary");
         student.setEmail("mary@168.com");
         student.setAge(17);
         Object s1 = studentRespostiory.save(student);
         System.out.println("保存的对象："+s1);
     }

通过.save（）将依据创建好的对象存入数据库

我们在linux下查询

成功的添加了数据

3.查询所有数据

     @Test
    public void  findList(){
         List<Student> studentList = studentRespostiory.findAll();
         for (Student s:studentList) {
             System.out.println("查询记录："+s);
         }
     }

 结果

 4.根据id查询

    @Test
    public void  findById(){
        Student student = studentRespostiory.findById("62049665dd5a9245cc968271").get();
        System.out.println("根据id查询"+student);
    }

 5.添加查询

    @Test
    public void findStudentList(){
        Student student = new Student();
        student.setAge(16);
        student.setName("jock");
        Example<Student> stExample= Example.of(student);
        List<Student> userList = studentRespostiory.findAll(stExample);
        System.out.println(userList);
    }

 通过findAll查询数据记录但是我们要把封装好的条件对象stExample传入到这个方法中，先把封装好的对象用Example.of（）处理

 6.模糊查询

    @Test
    public void findStudentList(){
         //固定格式--模糊匹配规则
        ExampleMatcher matcher=ExampleMatcher.matching()
                .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING)
                .withIgnoreCase(true);
        
        Student student = new Student();
        student.setName("c");
        Example<Student> stExample = Example.of(student,matcher);
        List<Student> studentList = studentRespostiory.findAll(stExample);
        for (Student s:studentList) {
            System.out.println("查询记录："+s);
        }
    }

和条件查询差不多只要传入模糊查询的匹配规则。

7.分页查询

条件带分页

    @Test
    public void findPage(){
        Pageable pageable= PageRequest.of(0,3);
        Student student=new Student();
        student.setName("mary");

        Example<Student> stExample = Example.of(student);
        Page<Student> all = studentRespostiory.findAll(stExample, pageable);
        System.out.println(all);

    }

结果

 8.更新数据

    @Test
    public void updata(){
        Student student = studentRespostiory.findById("62049665dd5a9245cc968271").get();
        student.setName("DFP77");
        studentRespostiory.save(student);
    }

和插入数据方法一样但是这里如果有识别带有id值会根据id修改之前的值

查看数据库

9.删除 

    @Test
    public void del(){
         studentRespostiory.deleteById("62049665dd5a9245cc968271");
    }

调用方法传入id