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 | 41 ++++++++++++++++++++++++++++++++++-------
1 files changed, 34 insertions(+), 7 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 300eb79..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
@@ -1,18 +1,22 @@
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) {
+
+ 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");
Matcher matcher = pattern.matcher(rule);
@@ -21,11 +25,13 @@
while (matcher.find()) {
String fieldName = matcher.group(1);
int value = Integer.parseInt(matcher.group(2));
- map.put(fieldName+"_"+value, value);
+ map.put(fieldName + "_" + value, value);
}
return map;
}
- public static double calculate(String expression,Map<String,Object> value) {
+
+ public static double calculate(String expression, Map<String, Object> value) {
+
expression = formatExpression(expression);
// 创建 JEXL 引擎
JexlEngine jexl = new JexlBuilder().create();
@@ -35,8 +41,24 @@
// 创建上下文
JexlContext context = new MapContext();
for (Map.Entry<String, Object> stringObjectEntry : value.entrySet()) {
- context.set(stringObjectEntry.getKey(),stringObjectEntry.getValue());
+ context.set(stringObjectEntry.getKey(), stringObjectEntry.getValue());
}
+ // 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 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);
@@ -51,7 +73,12 @@
.replaceAll("÷", "/")
.replaceAll("（", "(")
.replaceAll("）", ")")
- .replaceAll("＋","+")
+ .replaceAll("＋", "+")
.replaceAll("－", "-");
}
+
+ public static void main(String[] args) {
+ String string = "field_3 * field_2";
+ System.out.println(getFieldsAndValue(string));
+ }
}
--
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