1. Customize JPA Repository base class:

   @SpringBootApplication
   @EnableJpaRepositories(repositoryBaseClass = ExpressionsRepositoryImpl.class)
   public class Application { … }

2. Change your repository to extend ExpressionsRepository:

   @Repository
   public interface EmployeeRepository extends ExpressionsRepository<Employee, Long> {
   }

3. Build the controller/service:

   @PostMapping("/search")
   public ResponseEntity<Page<EmployeeDto>> search(@RequestBody Expressions expressions, Pageable pageable) {
   
       return ok().body(
                   employeeRepository.findAll(expressions, pageable).map(employeeMapper::toDto)
           );
   }

4. Send Mongodb query in JSON from frontend:

   {
     "$or": [
       {"lastName": "ibrahim"},
       {
         "$and": [
           {"firstName": "mostafa"},
           {"birthDate": {"$gt": "1990-01-01"}}
         ]
       }
     ]
   }

For a quick start see this Medium post or dev.to post or see this demo example on Github.

See documentation website for details about how to get started.

For spring-boot 3.x:

<dependency>
  <groupId>com.github.mhewedy</groupId>
  <artifactId>spring-data-jpa-mongodb-expressions</artifactId>
  <version>0.1.9</version>
</dependency>

For spring-boot 2.x:

<dependency>
  <groupId>com.github.mhewedy</groupId>
  <artifactId>spring-data-jpa-mongodb-expressions</artifactId>
  <version>0.0.8</version>
</dependency>

Special thanks to Rashad Saif and Hamada Elnoby for helping in the design, inspring with ideas, and for doing code review.

This repo has been mentioned in spring.io weekly news.