import org.springframework.beans.BeanUtils; 
public Result updatePostgraduate(@RequestBody EasPostgraduate easPostgraduate) { 
    EasPostgraduate oldPostgraduate = easPostgraduateService.getById(easPostgraduate.getId()); 
    BeanUtils.copyProperties(easPostgraduate, oldPostgraduate); easPostgraduateService.updateById(oldPostgraduate); 
} 

// 集合类需要遍历复制 
List<Company> companies = companyMapper.selectList(new QueryWrapper<Company>().lambda().like(name != null 
&& !"".equals(name), Company::getName, name) );
List<CompanyInfoVO> companyInfo = new ArrayList<>(); 
for (Company company : companies) { 
    CompanyInfoVO companyInfoVO = new CompanyInfoVO(); 
    BeanUtils.copyProperties(company, companyInfoVO);
    companyInfo.add(companyInfoVO); 
}