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@@ -0,0 +1,40 @@
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+package cn.iocoder.dashboard.util.sping;
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+
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+import org.aspectj.lang.ProceedingJoinPoint;
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+import org.aspectj.lang.reflect.MethodSignature;
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+import org.springframework.core.DefaultParameterNameDiscoverer;
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+import org.springframework.expression.EvaluationContext;
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+import org.springframework.expression.Expression;
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+import org.springframework.expression.spel.standard.SpelExpressionParser;
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+import org.springframework.expression.spel.support.StandardEvaluationContext;
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+
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+import java.lang.reflect.Method;
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+
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+public class SpElUtil {
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+
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+ private SpElUtil() {
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+ }
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+
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+ public static String analysisSpEl(String spElString, ProceedingJoinPoint joinPoint) {
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+ SpelExpressionParser parser = new SpelExpressionParser();
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+ DefaultParameterNameDiscoverer nameDiscoverer = new DefaultParameterNameDiscoverer();
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+ // 通过joinPoint获取被注解方法
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+ MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
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+ Method method = methodSignature.getMethod();
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+ // 使用spring的DefaultParameterNameDiscoverer获取方法形参名数组
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+ String[] paramNames = nameDiscoverer.getParameterNames(method);
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+ // 解析过后的Spring表达式对象
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+ Expression expression = parser.parseExpression(spElString);
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+ // spring的表达式上下文对象
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+ EvaluationContext context = new StandardEvaluationContext();
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+ // 通过joinPoint获取被注解方法的形参
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+ Object[] args = joinPoint.getArgs();
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+ // 给上下文赋值
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+ for (int i = 0; i < args.length; i++) {
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+ context.setVariable(paramNames[i], args[i]);
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+ }
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+ Object value = expression.getValue(context);
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+ return value == null ? "null" : value.toString();
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+
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+ }
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+}
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