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在 Spring 项⽬中#xff0c;通过 main ⽅法获取到 Controller 类#xff0c;调⽤ Controller ⾥⾯通过注⼊的⽅式调⽤ Service 类#xff0c;Service 再通过注⼊的⽅式获取到 Repository 类#xff0c;Repository 类⾥⾯有⼀个⽅法构建⼀个 User 对象#xff0c;返…练习
在 Spring 项⽬中通过 main ⽅法获取到 Controller 类调⽤ Controller ⾥⾯通过注⼊的⽅式调⽤ Service 类Service 再通过注⼊的⽅式获取到 Repository 类Repository 类⾥⾯有⼀个⽅法构建⼀个 User 对象返回给 main ⽅法。Repository ⽆需连接数据库使⽤伪代码即可。 User类
package com.java.demo.model;public class User {private int id;private String name;public int getId() {return id;}public void setId(int id) {this.id id;}public String getName() {return name;}public void setName(String name) {this.name name;}Overridepublic String toString() {return User{ id id , name name \ };}
}
UserController类
package com.java.demo.controller;import com.java.demo.model.User;
import com.java.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;Controller
public class UserController {Autowiredprivate UserService userService;public User getUser() {return userService.getUser();}
}
UserRepository类
package com.java.demo.repository;import com.java.demo.model.User;
import org.springframework.stereotype.Repository;Repository
public class UserRepository {public User getUser() {// 伪代码User user new User();user.setId(1);user.setName(张三);return user;}
}
UserService类
package com.java.demo.service;import com.java.demo.model.User;
import com.java.demo.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;Service
public class UserService {Autowiredprivate UserRepository userRepository;public User getUser() {return userRepository.getUser();}
}
App类
package com.java.demo;import com.java.demo.controller.UserController;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class App {public static void main(String[] args) {ApplicationContext context new ClassPathXmlApplicationContext(spring-config.xml);UserController userController context.getBean(userController, UserController.class);System.out.println(userController.getUser());}
}
