Capa service

src/main/java/com/app/backend/controller/StudentApiController.java

@@ -2,6 +2,7 @@
 
 import com.app.backend.model.StudentModel;
 import com.app.backend.service.impl.StudentServiceImpl;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
@@ -16,4 +17,8 @@ public interface StudentApiController {
     public StudentModel createStudent(@RequestBody StudentModel newStudent);
     @GetMapping("/students/{id}")
     public StudentModel getStudentById(@PathVariable int id);
+    @PutMapping("/update-student/{id}")
+    public ResponseEntity<String> updateStudentById(@PathVariable int id, @RequestBody StudentModel newStudent);
+    @DeleteMapping("delete-student/{id}")
+    public ResponseEntity<String> deleteStudentById(@PathVariable int id);
 }

src/main/java/com/app/backend/controller/impl/StudentApiControllerImpl.java

@@ -6,6 +6,7 @@
 import com.app.backend.service.impl.StudentServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
@@ -30,4 +31,11 @@ public StudentModel createStudent(@RequestBody StudentModel newStudent){
     public StudentModel getStudentById(@PathVariable int id){
         return studentService.getStudentById(id);
     }
+    @Override
+    public ResponseEntity<String> deleteStudentById(@PathVariable int id){
+        return studentService.deleteStudentById(id);
+    }
+    public ResponseEntity<String> updateStudentById(@PathVariable int id, @RequestBody StudentModel newStudent){
+        return studentService.updateStudentById(id, newStudent);
+    }
 }

src/main/java/com/app/backend/model/StudentModel.java

@@ -3,6 +3,14 @@
 import java.util.Date;
 
 public class StudentModel {
+    private Integer id;
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
     public String getFirstName() {
         return firstName;
     }

src/main/java/com/app/backend/service/StudentService.java

@@ -1,8 +1,11 @@
 package com.app.backend.service;
 
 import com.app.backend.model.StudentModel;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 
+import java.net.http.HttpResponse;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -14,4 +17,6 @@ public interface StudentService {
     public List<StudentModel> getStudentsList();
     public StudentModel createStudent(StudentModel newStudent);
     public StudentModel getStudentById(int id);
+    public ResponseEntity<String> deleteStudentById(int Id);
+    public ResponseEntity<String> updateStudentById(int id, StudentModel newStudent);
 }

src/main/java/com/app/backend/service/impl/StudentServiceImpl.java

@@ -2,10 +2,17 @@
 
 import com.app.backend.model.StudentModel;
 import com.app.backend.service.StudentService;
+import jakarta.annotation.Nullable;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 
+import javax.lang.model.type.NullType;
+import java.net.http.HttpResponse;
 import java.util.List;
 
+import static org.springframework.http.HttpStatus.OK;
+
 @Service
 public class StudentServiceImpl implements StudentService {
     public List<StudentModel> getStudentsList() {
@@ -15,7 +22,34 @@ public StudentModel createStudent(StudentModel newStudent){
         this.students.add(newStudent);
         return newStudent;
     }
+    @Nullable
     public StudentModel getStudentById(int id){
-        return this.students.get(id);
+        for(StudentModel student : this.students){
+            if(student.getId() == id){
+                return student;
+            }
+        }
+        return null;
+    }
+
+    public ResponseEntity<String> deleteStudentById(int id){
+        for(StudentModel student : this.students){
+            if(student.getId() == id){
+                students.remove(student);
+                return ResponseEntity.status(OK).body(String.format("Estudiante con id %d eliminado correctamente", id));
+            }
+        }
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(String.format("Estudiante con id %d no encontrado", id));
+    }
+
+    public ResponseEntity<String> updateStudentById(int id, StudentModel newStudent){
+        for(int i = 0; i < this.students.size(); i++) {
+            if(this.students.get(i).getId() == id){
+                newStudent.setId(id);
+                this.students.set(i, newStudent);
+                return ResponseEntity.status(OK).body(String.format("Estudiante con id %d actualizado correctamente", id));
+            }
+        }
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(String.format("Estudiante con id %d no encontrado", id));
     }
 }