Это мой первый опыт использования Spring MVC с REST API для углового переднего конца.Я создал 3 файла конфигурации:
Вот мой ApplicationConfig
package com.app.config;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import javax.persistence.EntityManagerFactory;
@SuppressWarnings("unused")
@EnableWebMvc
@Configuration
@ComponentScan("com.app.controller")
@EnableJpaRepositories("com.app.dao")
public class ApplicationConfig {
@Bean
public InternalResourceViewResolver setup() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
@Bean
public DataSource dataSource() {
System.out.println("in datasoure");
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/db");
dataSource.setUsername("root");
dataSource.setPassword("");
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("com.app.model");
factory.setDataSource(dataSource());
return factory;
}
@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
}
MVC Config
package com.app.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
@EnableWebMvc
@Configuration
public class MvcConfig implements WebMvcConfigurer {
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp("/WEB-INF/views/", ".jsp");
}
@Bean
public InternalResourceViewResolver setup() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
WebInitializer
package com.app.config;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return null;
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { ApplicationConfig.class, MvcConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
Я также создал контроллер:
package com.app.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.app.dao.AdminsRepository;
import com.app.model.Admin;
@SuppressWarnings("unused")
@Controller
public class AdminsController {
@Autowired
private AdminsRepository adminsRepository;
@GetMapping("/admins")
@ResponseBody
public String getAllAdmins(Model model) {
return adminsRepository.findAll().toString();
}
@GetMapping("/admin/{id}")
@ResponseBody
public String getAdmin(@PathVariable("id") int id, Model model) {
return adminsRepository.findById((long) id).orElse(null).toString();
}
@PostMapping("/admin")
@ResponseBody
public String createAdmin(Admin admin, Model model) {
System.out.println(admin);
return adminsRepository.save(admin).toString();
}
}
Репозиторий:
package com.app.dao;
//import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
import com.app.model.Admin;
@Repository
public interface AdminsRepository extends JpaRepository <Admin, Long>{ }
И моя модель:
package com.app.model;
import java.io.Serializable;
import javax.persistence.*;
import java.sql.Timestamp;
import java.util.List;
@Entity
@Table(name="admins")
@NamedQuery(name="Admin.findAll", query="SELECT a FROM Admin a")
public class Admin implements Serializable {
private static final long serialVersionUID = 1L;
@Id
private int id;
@Column(name="created_at")
private Timestamp createdAt;
private String email;
private String login;
private String password;
private String name;
private String surname;
// ... getters and setters + delegated methods
}
Когда я запускаю приложение и открываю браузер, я получаю сообщение об ошибке:
No qualifying bean of type 'com.app.dao.AdminsRepository' available:
expected at least 1 bean which qualifies as autowire candidate. Dependency annotations:
{@org.springframework.beans.factory.annotation.Autowired(required=true)}