✨ 添加测试代码

mica-mqtt-common/src/test/java/org/dromara/mica/mqtt/core/util/FastTemplateParser.java

@@ -0,0 +1,95 @@
+package org.dromara.mica.mqtt.core.util;
+
+import java.util.*;
+
+public class FastTemplateParser {
+	/**
+	 * 固定文本序列
+	 */
+    private final List<String> literals;
+	/**
+	 * 变量名序列
+	 */
+    private final List<String> variables;
+
+    public FastTemplateParser(String template) {
+        this.literals = new ArrayList<>();
+        this.variables = new ArrayList<>();
+        parseTemplate(template);
+    }
+
+    /**
+     * 解析模板结构
+     * 示例输入："abc${name}xx${like}cc"
+     * 输出：
+     *   literals = ["abc", "xx", "cc"]
+     *   variables = ["name", "like"]
+     */
+    private void parseTemplate(String template) {
+        int start = 0;
+        while (true) {
+            int varStart = template.indexOf("${", start);
+            if (varStart == -1) {
+				break;
+			}
+			 // 记录固定文本
+			literals.add(template.substring(start, varStart));
+			int varIdx = varStart + 2;
+            int varEnd = template.indexOf('}', varIdx);
+            if (varEnd == -1) {
+				throw new IllegalArgumentException("模板格式错误");
+			}
+            // 记录变量名
+            variables.add(template.substring(varIdx, varEnd));
+            start = varEnd + 1;
+        }
+        literals.add(template.substring(start)); // 添加末尾固定文本
+    }
+
+    /**
+     * 提取变量值
+     * 示例输入："abcDreamluxxHellocc"
+     * 输出：{name=Dreamlu, like=Hello}
+     */
+    public Map<String, String> parse(String input) {
+        Map<String, String> result = new LinkedHashMap<>();
+        int currentPos;
+
+        // 校验第一个固定文本
+        String firstLiteral = literals.get(0);
+        if (!input.startsWith(firstLiteral)) {
+			return result;
+		}
+        currentPos = firstLiteral.length();
+
+        // 遍历后续固定文本来提取变量
+        for (int i = 1; i < literals.size(); i++) {
+            String literal = literals.get(i);
+            int literalPos = input.indexOf(literal, currentPos);
+
+            if (literalPos == -1) {
+				return Collections.emptyMap(); // 未找到固定文本
+			}
+
+            // 提取变量值
+            String varValue = input.substring(currentPos, literalPos);
+            result.put(variables.get(i - 1), varValue);
+
+            currentPos = literalPos + literal.length();
+        }
+
+        // 校验末尾是否匹配
+        return (currentPos == input.length()) ? result : Collections.emptyMap();
+    }
+
+    // 测试用例
+    public static void main(String[] args) {
+        FastTemplateParser parser = new FastTemplateParser("/abc/${name}xx${like}/cc");
+        Map<String, String> res = parser.parse("/abc/DreamluxxHello/cc");
+        System.out.println(res); // {name=Dreamlu, like=Hello}
+        // 异常测试
+        Map<String, String> errRes = parser.parse("/abc/ERRORxxHello/cc");
+        System.out.println(errRes); // {}
+    }
+
+}