Я пишу веб maven Spring проект, надо на сайте вывести информацию о студентах. Я написал код, но не знаю почему он не работает, может что-то забыл дописать.
А вот мои коды Пакет adil.java.springmyschool.db
Класс StudentDB
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package adil.java.springmyschool.db;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.Data;
import lombok.EqualsAndHashCode;
@Entity
@Table(name = "students")
@EqualsAndHashCode(callSuper = true)
@Data //from lombok, for generate getters, setters, etc
public class StudentDB {
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "first_name")
private String firstName;
@Column(name = "last_name")
private String lastName;
@Column(name = "patron")
private String patron;
@Column(name = "birthday")
private Date birthday;
}
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Класс StudentRepository
package adil.java.springmyschool.db;
import adil.java.springmyscholl.entity.Student;
import org.springframework.data.repository.CrudRepository;
public interface StudentRepository extends CrudRepository<Student, Long> {
}
Класс StudentService
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package adil.java.springmyschool.db;
import adil.java.springmyscholl.entity.Student;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
@RequiredArgsConstructor //lombok
@Service
public class StudentService {
private final StudentRepository studentRepository;
public void someExample() {
Student student = studentRepository.findById(12);
student.setName("some_new_name");
//readAllStudentsFromDB
studentRepository.findAll();
//insertStudentIntoDB
studentRepository.save(new Student());
//deleteStudent
studentRepository.deleteById(1);
//update
studentRepository.save(student);
}
}
Пакет adil.java.springmyschool
Класс AddStudentController
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package adil.java.springmyschool.controller;
import adil.java.springmyscholl.entity.Student;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class AddStudentController {
@RequestMapping(value = "/addstudent", method = RequestMethod.GET)
public ModelAndView student(){
return new ModelAndView("addstudent", "command", new Student());
}
@RequestMapping(value = "/addstudent", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("addstudent") Student student,
ModelMap model,
BindingResult result) {
model.addAttribute("name",student.getName());
model.addAttribute("surname",student.getSurname());
model.addAttribute("image",student.getImage());
return "ShowAllStudent";
}
}
Класс RemoveStudentController
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package adil.java.springmyschool.controller;
import adil.java.springmyscholl.entity.Student;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class RemoveStudentController {
@RequestMapping(value = "/RemoveStudent", method = RequestMethod.GET)
public ModelAndView student(){
return new ModelAndView("RemoveStudent", "command", new Student());
}
@RequestMapping(value = "/RemoveStudent",
method = RequestMethod.POST)
public String addStudent(@ModelAttribute("RemoveStudent") Student student,
ModelMap model,
BindingResult result) {
model.addAttribute("name",student.getName());
model.addAttribute("surname",student.getSurname());
model.addAttribute("image",student.getImage());
return "ShowAllStudent";
}
}
Пакет adil.java.springmyschool.entity
Класс Student
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package adil.java.springmyscholl.entity;
import java.time.LocalDate;
import java.util.ArrayList;
public class Student {
private int id;
private String name;
private String surname;
private String image;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public String getSurname() {
return surname;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
