java中在静态方法中调用service层接口

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.Objects;


@Component
public class CommonUtil{

    @Autowired
    private ITeacherService teacherService;

    public static CommonUtil commonUtil;
    
		//初始化
    @PostConstruct
    public void init() {
        commonUtil= this;
        commonUtil.teacherService= this.teacherService;
    }

    
    public static PortalPolicyInfo get(String id) {
    //TODO 逻辑
    //调用
    	commonUtil.teacherService.getById(id);
      return bean;
    }
}