空属性赋值问题

MyBeanUtils类

public class MyBeanUtils { public static String[] getNullPropertyNames(Object source){ BeanWrapper beanWrapper=new BeanWrapperImpl(source); PropertyDescriptor[] pds=beanWrapper.getPropertyDescriptors(); List<String> nullPropertyNames=new ArrayList<>(); for (PropertyDescriptor pd:pds){ String propertyName=pd.getName(); if(beanWrapper.getPropertyValue(propertyName)==null){ nullPropertyNames.add(propertyName); } } return nullPropertyNames.toArray(new String[nullPropertyNames.size()]); }}

在NewServiceImpl中对updateNew方法进行修改

@Override public News updateNew(Long id, News news) { News news1=newRepository.findById(id).orElse(null); if(news1==null){ // System.out.println("未获得更新对象"); throw new NotFoundException("该新闻不存在"); } //更新后传入的news复制给news1，查找更新数据news中空值属性，忽略不复制给news1 BeanUtils.copyProperties(news,news1, MyBeanUtils.getNullPropertyNames(news)); news1.setUpdateTime(new Date()); return newRepository.save(news1); }

日志打印

新建一个LogAspect类

@Aspect@Componentpublic class LogAspect { private final Logger logger= LoggerFactory.getLogger(this.getClass()); @Pointcut("execution(* com.zr0726.news.web.*.*(..))") public void log(){} @Before("log()") public void doBefore(JoinPoint joinPoint){ //获得request ServletRequestAttributes attributes=(ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); HttpServletRequest request=attributes.getRequest(); //获得url和ip String url=request.getRequestURL().toString(); String ip=request.getRemoteAddr(); String classMethod=joinPoint.getSignature().getDeclaringTypeName()+"."+joinPoint.getSignature().getName(); Object[] args=joinPoint.getArgs(); Requestlog requestlog=new Requestlog(url,ip,classMethod,args); logger.info("_____________________doBefore_______________________"); } @After("log()") public void doAfter(){ logger.info("_____________________doAfter_______________________"); } @AfterReturning(returning = "result",pointcut = "log()") public void adAfterReturn(Object result){ logger.info("Result: {}",result); } private class Requestlog{ private String url; private String ip; private String classMethod; private Object[] args; public Requestlog(String url, String ip, String className, Object[] args) { this.url = url; this.ip = ip; this.classMethod = className; this.args = args; } @Override public String toString() { return "Requestlog{" + "url='" + url + '\'' + ", ip='" + ip + '\'' + ", classMethod='" + classMethod + '\'' + ", args=" + Arrays.toString(args) + '}'; } }}

效果展示

总结

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