Subida practica crud con Springboot y BD PostgreSQL

Author: Diegocastro21

src/main/java/com/example/postgresql/student/Student.java

@@ -3,6 +3,7 @@
 import javax.persistence.*;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.Period;
 
 @Entity
 @Table
@@ -22,23 +23,22 @@ public class Student {
     private String name;
     private String email;
     private LocalDate dob;
+    @Transient
     private Integer age;
 
 
 
-    public Student(Long id, String name, String email, LocalDate dob, Integer age) {
+    public Student(Long id, String name, String email, LocalDate dob ) {
         this.id = id;
         this.name = name;
         this.email = email;
         this.dob = dob;
-        this.age = age;
     }
 
-    public Student(String name, String email, LocalDate dob, Integer age) {
+    public Student(String name, String email, LocalDate dob ) {
         this.name = name;
         this.email = email;
         this.dob = dob;
-        this.age = age;
     }
 
     public Student() {
@@ -78,7 +78,7 @@ public void setDob(LocalDate dob) {
     }
 
     public Integer getAge() {
-        return age;
+        return Period.between(this.dob, LocalDate.now()).getYears();
     }
 
     public void setAge(Integer age) {
@@ -88,11 +88,11 @@ public void setAge(Integer age) {
     @Override
     public String toString() {
         return "Student {" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                ", email='" + email + '\'' +
-                ", dob=" + dob +
-                ", age=" + age +
+                "\nid=" + id +
+                ", \nname='" + name + '\'' +
+                ", \nemail='" + email + '\'' +
+                ", \ndob=" + dob +
+                ", \nage=" + age +
                 '}';
     }
 }

src/main/java/com/example/postgresql/student/StudentConfig.java

@@ -0,0 +1,40 @@
+package com.example.postgresql.student;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.time.LocalDate;
+import java.time.Month;
+import java.util.List;
+
+@Configuration
+public class StudentConfig {
+
+    @Bean
+    CommandLineRunner commandLineRunner(StudentRepository repository){
+        return args -> {
+            Student juancho = new Student( 1L,
+                    "Juancho",
+                    "juanchito@gmail.com",
+                    LocalDate.of(2000, Month.FEBRUARY, 3)
+            );
+
+            Student petrico = new Student(
+                    "petrico",
+                    "petrico@gmail.com",
+                    LocalDate.of(2007, Month.JANUARY, 15)
+            );
+
+            Student uribe = new Student( 3L,
+                    "uribe",
+                    "falsospositivos@gmail.com",
+                    LocalDate.of(2004, Month.MARCH, 9)
+            );
+
+            repository.saveAll(
+                    List.of(juancho, petrico, uribe)
+            );
+        };
+    }
+}

src/main/java/com/example/postgresql/student/StudentController.java

@@ -1,9 +1,7 @@
 package com.example.postgresql.student;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
@@ -23,4 +21,25 @@ public StudentController(StudentService studentService) {
     public List<Student> getStudent(){
         return studentService.getStudent();
     }
+
+    @PostMapping
+    public void registerNewStudent(@RequestBody Student student){
+        studentService.addNewStudent(student);
+    }
+
+    @DeleteMapping(path = "{studentId}")
+    public void deleteStudent(@PathVariable("studentId") Long studentId){
+        studentService.deleteStudent(studentId);
+    }
+
+    @PutMapping(path = "{studentID}")
+    public void updateStudent(
+            @PathVariable("studentId") Long studentId,
+            @RequestParam(required = false) String name,
+            @RequestParam(required = false) String email){
+
+        studentService.updateStudent(studentId, name, email);
+    }
+
+
 }

src/main/java/com/example/postgresql/student/StudentRepository.java

@@ -1,11 +1,18 @@
 package com.example.postgresql.student;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.Optional;
+
 @Repository
-public interface StudentRepository extends JpaRepository<Student, Long> {
+public interface StudentRepository
+        extends JpaRepository<Student, Long> {
 
 
+    //SELECT * FROM student WHERE email = ?
+    @Query("SELECT s FROM Student s WHERE s.email = ?1")
+    Optional<Student> findStudentByEmail(String email);
 
 }

src/main/java/com/example/postgresql/student/StudentService.java

@@ -1,25 +1,73 @@
 package com.example.postgresql.student;
 
-import org.springframework.stereotype.Component;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDate;
 import java.time.Month;
 import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
 
 @Service
 public class StudentService {
 
+    private final StudentRepository studentRepository;
+
+    @Autowired
+    public StudentService(StudentRepository studentRepository) {
+        this.studentRepository = studentRepository;
+    }
+
 
     public List<Student> getStudent(){
-        return List.of(
-                new Student(
-                        1L,
-                        "Juancho",
-                        "juanchito@gmail.com",
-                        LocalDate.of(2000, Month.FEBRUARY, 3),
-                        21
-                )
-        );
+        return studentRepository.findAll();
+    }
+
+    public void addNewStudent(Student student) {
+        Optional<Student> studentOptional = studentRepository.findStudentByEmail(student.getEmail());
+
+        if (studentOptional.isPresent()) {
+            throw new IllegalStateException("email taken");
+        }
+        studentRepository.save(student);
     }
+
+    public void deleteStudent(Long studentId) {
+        boolean exists = studentRepository.existsById(studentId);
+        if(!exists) throw new IllegalStateException("student with id: "+ studentId + " does not exits");
+
+        studentRepository.deleteById(studentId);
+    }
+
+    @Transactional
+    public void updateStudent(Long studentId, String name, String email){
+
+        Student student = studentRepository.findById(studentId)
+                .orElseThrow(() -> new IllegalStateException(
+                "student with id --> [ "+studentId+ " ] does not exits"
+        ));
+
+        if (name != null && name.length() > 0 &&
+            !Objects.equals(student.getName(), name)) {
+
+            student.setName(name);
+        }
+
+        if (email != null && email.length() > 0 &&
+                !Objects.equals(student.getEmail(), email)) {
+
+            Optional<Student> studentOptional = studentRepository.findStudentByEmail(email);
+
+            if (studentOptional.isPresent()) {
+                throw new IllegalStateException("email taken");
+            }
+
+            student.setEmail(email);
+
+        }
+
+    }
+
 }

src/main/resources/application.properties

@@ -5,3 +5,5 @@ spring.jpa.hibernate.ddl-auto=create-drop
 spring.jpa.show-sql=true
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 spring.jpa.properties.hibernate.format_sql=true
+
+server.error.include-message=always