From d68c61517a3a6d4ec4d47844c21bdc143f99cbab Mon Sep 17 00:00:00 2001
From: mitao <2763622819@qq.com>
Date: 星期三, 17 四月 2024 22:58:05 +0800
Subject: [PATCH] 大屏接口
---
ruoyi-common/src/main/java/com/ruoyi/common/utils/CalculateUtil.java | 30 ++++++++++++++++++++++++++++--
1 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/CalculateUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/CalculateUtil.java
index 369136a..4b9057e 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/CalculateUtil.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/CalculateUtil.java
@@ -1,17 +1,21 @@
package com.ruoyi.common.utils;
-import org.apache.commons.jexl3.*;
-
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
+import org.apache.commons.jexl3.JexlBuilder;
+import org.apache.commons.jexl3.JexlContext;
+import org.apache.commons.jexl3.JexlEngine;
+import org.apache.commons.jexl3.JexlExpression;
+import org.apache.commons.jexl3.MapContext;
/**
* @author mitao
* @date 2024/3/27
*/
public class CalculateUtil {
+
public static Map<String, Integer> getFieldsAndValue(String rule) {
// 正则表达式模式，匹配形如 "fieldName:value" 的字符串
Pattern pattern = Pattern.compile("\\b(\\w+)_(\\d+)\\b");
@@ -27,6 +31,7 @@
}
public static double calculate(String expression, Map<String, Object> value) {
+
expression = formatExpression(expression);
// 创建 JEXL 引擎
JexlEngine jexl = new JexlBuilder().create();
@@ -46,6 +51,22 @@
return Double.parseDouble(result.toString());
}
+ public static double calculate(String expression) {
+ // 创建 JEXL 引擎
+ JexlEngine jexl = new JexlBuilder().create();
+
+ // 创建表达式对象
+ JexlExpression exp = jexl.createExpression(expression);
+ // 创建上下文
+ JexlContext context = new MapContext();
+ // 执行计算
+ Object result = exp.evaluate(context);
+
+ // 输出结果
+ System.out.println("Result: " + result);
+ return Double.parseDouble(result.toString());
+ }
+
public static String formatExpression(String expression) {
return expression
.replaceAll("×", "*")
@@ -55,4 +76,9 @@
.replaceAll("＋", "+")
.replaceAll("－", "-");
}
+
+ public static void main(String[] args) {
+ String string = "field_3 * field_2";
+ System.out.println(getFieldsAndValue(string));
+ }
}
--
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