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实现步骤：

   			
    
     org.projectlombok
    			
    
     lombok
    			
    
     1.18.4
    		
   

2.在controller中，为接口方法需要校验的参数加上@Valid注解，并添加一个参数BindingResult紧跟在@Valid注解的参数后面，如果有多个参数加了@Valid，就有多个BindingResult。

   			
    
     org.springframework.boot
    			
    
     spring-boot-starter-aop
    		
   

package com.nelson.edu.aspect;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Pointcut;import org.springframework.stereotype.Component;import org.springframework.validation.BindingResult;import org.springframework.validation.FieldError;import org.springframework.validation.ObjectError;@Aspect@Componentpublic class ValidateAspect {    @Pointcut("execution(public * com.nelson..edu.controller.*.*(..))")    public void validate() {    }    @Around("validate()")    public Object around(ProceedingJoinPoint joinPoint) throws Throwable {        BindingResult bindingResult = null;        Object[] args = joinPoint.getArgs();        if (args != null && args.length != 0) {            for (Object object : args) {                if (object instanceof BindingResult) {                    bindingResult = (BindingResult) object;                    break;                }            }        }        if (bindingResult != null && bindingResult.hasErrors()) {            StringBuffer sb = new StringBuffer();            for (ObjectError objectError : bindingResult.getAllErrors()) {                sb.append(((FieldError) objectError).getField() + " : ").append(objectError.getDefaultMessage() + ",");            }            sb.deleteCharAt(sb.length() - 1);            return sb.toString();        }        return joinPoint.proceed();    }}

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