Pomelo Lee workspace

package com.i5a6.semp.test;
 
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
 
public class TestExpress {
 
	public static void main(String[] args) {
		int num = dynamicCalOutput(2, 2, "#playerLevel^(1/2.7)*100*#num");
 
		System.out.println((Math.pow(2, (1 / 2.7)) * 100));
		System.out.println(num);
 
	}
 
	public static int dynamicCalOutput(int lev, int num, String arithmetic) {
		if (arithmetic == null || arithmetic.length() <= 0) {
			return 0;
		}
		ExpressionParser parser = new SpelExpressionParser();
		Expression expression = parser.parseExpression(arithmetic);
 
		EvaluationContext context = new StandardEvaluationContext();
		context.setVariable("playerLevel", lev);
		context.setVariable("num", num);
		return expression.getValue(context, Integer.class);
	}
}