первая лаба сделана

backend/build.gradle

@@ -17,6 +17,8 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web' 
+	implementation 'org.springframework.boot:spring-boot-starter-actuator'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 

backend/src/main/java/com/example/backend/BackendApplication.java

@@ -1,13 +1,63 @@
 package com.example.backend;
 
+import java.util.ArrayList;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+
 
 @SpringBootApplication
+@RestController
+@RequestMapping("/api")
 public class BackendApplication {
 
+	private ArrayList<TestDTO> list = new ArrayList<>();
+
 	public static void main(String[] args) {
 		SpringApplication.run(BackendApplication.class, args);
 	}
 
+	@GetMapping("/hello")
+	public String get(@RequestParam(name = "name", defaultValue = "World!") String name){
+		return String.format("Hello, %s", name);
+	}
+
+	@GetMapping()
+	public ArrayList<TestDTO> getAll(){
+		return list;
+	}
+
+	@GetMapping("/id") 
+	public TestDTO getById(@RequestParam(name = "id") int id){
+		return list.get(id); 
+	}
+
+	@PostMapping()
+	public TestDTO postTestDTO(@RequestBody TestDTO testDTO) {
+		list.add(testDTO);
+		return testDTO;
+	}
+
+	@PutMapping("/{id}")
+	public TestDTO updaTestDTO(@PathVariable(name = "id") int id, @RequestBody TestDTO entity) {
+		list.add(id, entity);
+		return entity;
+	}
+	
+
+	@DeleteMapping("{id}")
+	public TestDTO delMethod(@PathVariable(name = "id") int id){
+		return list.remove(id);
+	}		
+
 }

backend/src/main/java/com/example/backend/TestDTO.java

@@ -0,0 +1,55 @@
+package com.example.backend;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class TestDTO {
+
+    private Integer id;
+    private String name;
+    private String img;
+
+    public TestDTO() {
+
+    }
+
+    @JsonCreator
+    public TestDTO(
+            @JsonProperty(value = "id") Integer id,
+            @JsonProperty(value = "name") String name,
+            @JsonProperty(value = "img") String img
+            )
+            {
+        this.id = id;
+        this.name = name;
+        this.img = img;
+    }
+
+    // GET
+
+    public Integer getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getImg(){
+        return img;
+    }
+
+    // SET
+
+    public void setId(Integer Id) {
+        id = Id;
+    }
+
+    public void setName(String Name) {
+        name = Name;
+    }
+
+    public void setImg(String Img){
+        img = Img;
+    }
+}

backend/src/main/java/com/example/backend/WebConfig.java

@@ -0,0 +1,16 @@
+package com.example.backend;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.lang.NonNull;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer{
+    @Override
+    public void addCorsMappings(@NonNull CorsRegistry registry){
+        registry.addMapping("/**")
+            .allowedMethods("GET", "POST", "PUT", "DELETE");
+
+    }
+}