createmodel-java/src/main/java/ieven/server/webapp/service/user/UserService.java

package ieven.server.webapp.service.user;

import cn.hutool.core.io.FileUtil;
import cn.hutool.json.JSONArray;
import cn.hutool.json.JSONUtil;
import ieven.server.webapp.domain.user.User;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@Service
public class UserService {
  @Value("classpath:user.json")
  private Resource userResources;

  public List<User> users = new ArrayList<>();

  @PostConstruct
  public void loadUsers() throws IOException {
    List<String> strings = FileUtil.readLines(userResources.getFile(), "utf-8");
    JSONArray jsonArray = JSONUtil.parseArray(String.join("", strings));
    this.users = JSONUtil.toList(jsonArray, User.class);
    for (User user : users) {
      System.out.println(user.getLoginName());
    }
  }

  public User loginAccount(User user) {
    for (User user1 : users) {
      if (user.getLoginName().equals(user1.getLoginName())
          && user.getPassword().equals(user1.getPassword())) {
        return user;
      }
    }
    return null;
  }
}