spring boot空属性赋值问题与aspect日志实现方法

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
@Component
public 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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