springboot防重复提交工具包

package com.wx.idempotent.service.impl; import cn.hutool.core.util.ArrayUtil; import com.wx.idempotent.annotation.Idempotent; import com.wx.idempotent.service.IdempotentKeyResolver; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.reflect.MethodSignature; import org.springframework.core.LocalVariableTableParameterNameDiscoverer; import org.springframework.core.ParameterNameDiscoverer; import org.springframework.expression.Expression; import org.springframework.expression.ExpressionParser; import org.springframework.expression.spel.standard.SpelExpressionParser; import org.springframework.expression.spel.support.StandardEvaluationContext; import java.lang.reflect.Method; /** * 基于 Spring EL 表达式， * * @author Hu Wentao */ public class ExpressionIdempotentKeyResolver implements IdempotentKeyResolver { private final ParameterNameDiscoverer parameterNameDiscoverer = new LocalVariableTableParameterNameDiscoverer(); private final ExpressionParser expressionParser = new SpelExpressionParser(); @Override public String resolver(JoinPoint joinPoint, Idempotent idempotent) { // 获得被拦截方法参数名列表 Method method = getMethod(joinPoint); Object[] args = joinPoint.getArgs(); String[] parameterNames = this.parameterNameDiscoverer.getParameterNames(method); // 准备 Spring EL 表达式解析的上下文 StandardEvaluationContext evaluationContext = new StandardEvaluationContext(); if (ArrayUtil.isNotEmpty(parameterNames)) { for (int i = 0; i < parameterNames.length; i++) { evaluationContext.setVariable(parameterNames[i], args[i]); } } // 解析参数 Expression expression = expressionParser.parseExpression(idempotent.keyArg()); return expression.getValue(evaluationContext, String.class); } private static Method getMethod(JoinPoint point) { // 处理，声明在类上的情况 MethodSignature signature = (MethodSignature) point.getSignature(); Method method = signature.getMethod(); if (!method.getDeclaringClass().isInterface()) { return method; } // 处理，声明在接口上的情况 try { return point.getTarget().getClass().getDeclaredMethod( point.getSignature().getName(), method.getParameterTypes()); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } } }