src/main/java/de/szut/lf8_starter/project/ProjectController.java

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+package de.szut.lf8_starter.project;
+
+import de.szut.lf8_starter.project.dto.ProjectGetDto;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping(value = "projects")
+public class ProjectController {
+    private final ProjectService service;
+    private final ProjectMapper projectMapper;
+    public ProjectController(ProjectService service, ProjectMapper projectMapper) {
+        this.service = service;
+        this.projectMapper = projectMapper;
+    }
+
+    @Operation(summary = "returns all projects")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "all projects",
+                    content = {@Content(mediaType = "application/json",
+                            schema = @Schema(implementation = ProjectGetDto.class))}),
+            @ApiResponse(responseCode = "401", description = "not authorized",
+                    content = @Content)})
+    @GetMapping
+    public List<ProjectGetDto> findAll() {
+        return this.service
+                .readAll()
+                .stream()
+                .map(this.projectMapper::mapToGetDto)
+                .toList();
+    }
+}

src/main/java/de/szut/lf8_starter/project/ProjectMapper.java

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+package de.szut.lf8_starter.project;
+
+import de.szut.lf8_starter.project.dto.ProjectGetDto;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ProjectMapper {
+    public ProjectGetDto mapToGetDto(ProjectEntity entity) {
+        return new ProjectGetDto(
+                entity.getId(),
+                entity.getName(),
+                entity.getLeadingEmployee(),
+                entity.getEmployees(),
+                entity.getContractor(),
+                entity.getContractorName(),
+                entity.getComment(),
+                entity.getStartDate(),
+                entity.getEndDate()
+        );
+    }
+}

src/main/java/de/szut/lf8_starter/project/ProjectService.java

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+package de.szut.lf8_starter.project;
+
+import de.szut.lf8_starter.hello.HelloEntity;
+import de.szut.lf8_starter.hello.HelloRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class ProjectService {
+    private final ProjectRepository repository;
+
+    public ProjectService(ProjectRepository repository) {
+        this.repository = repository;
+    }
+
+    public List<ProjectEntity> readAll() {
+        return this.repository.findAll();
+    }
+}

src/main/java/de/szut/lf8_starter/project/dto/ProjectGetDto.java

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+package de.szut.lf8_starter.project.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+public class ProjectGetDto {
+    private long id;
+
+    private String name;
+
+    private long leadingEmployee;
+
+    private List<Long> employees;
+
+    private long contractor;
+
+    private String contractorName;
+
+    private String comment;
+
+    private LocalDate startDate;
+
+    private LocalDate endDate;
+}