fix: h2 js classname $$ parse failed

packer/src/main/java/com/reajason/javaweb/packer/h2/H2JSPacker.java

@@ -14,6 +14,12 @@ public class H2JSPacker implements Packer {
     @Override
     public String pack(ClassPackerConfig config) {
         String script = Packers.ScriptEngine.getInstance().pack(config);
+        // H2 的 $$..$$ 美元引用字符串没有转义机制，类名（如 SOAPUtils$Proxy0$$Lambda$1）中的
+        // $$ 会提前闭合字面量。$$ 只会出现在 JS 的字符串字面量中，拆成 "$"+"$" 拼接即可，
+        // 既不残留 $$，又能还原出原类名
+        while (script.contains("$$")) {
+            script = script.replace("$$", "$\"+\"$");
+        }
         return template.replace("{{script}}", script.replaceAll(";", "\\\\;"));
     }
 }

packer/src/test/java/com/reajason/javaweb/packer/h2/H2JSPackerTest.java

@@ -3,6 +3,14 @@ package com.reajason.javaweb.packer.h2;
 import com.reajason.javaweb.packer.ClassPackerConfig;
 import org.junit.jupiter.api.Test;
 
+import javax.script.Compilable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
 /**
  * @author ReaJason
  * @since 2025/6/28
@@ -10,10 +18,56 @@ import org.junit.jupiter.api.Test;
 class H2JSPackerTest {
 
     @Test
-    void test() {
-        H2JSPacker h2JSPacker = new H2JSPacker();
+    void pack() throws Exception {
         ClassPackerConfig classPackerConfig = new ClassPackerConfig();
-        classPackerConfig.setClassBytesBase64Str("bebe");
-        System.out.println(h2JSPacker.pack(classPackerConfig));
+        classPackerConfig.setClassName("com.reajason.javaweb.ErrorAbcdHandler");
+        classPackerConfig.setClassBytesBase64Str("aGVsbG8=");
+        String url = new H2JSPacker().pack(classPackerConfig);
+        String js = extractJs(url);
+        assertFalse(js.contains("$$"), "dollar-quoted body should not contain $$: " + js);
+        compileJs(js);
+        assertClassName(js, "com.reajason.javaweb.ErrorAbcdHandler");
     }
-}
+
+    @Test
+    void packClassNameWithLambdaSuffix() throws Exception {
+        ClassPackerConfig classPackerConfig = new ClassPackerConfig();
+        classPackerConfig.setClassName("le.gso.SzyHj.SOAPUtils$Proxy0$$Lambda$1");
+        classPackerConfig.setClassBytesBase64Str("aGVsbG8=");
+        String url = new H2JSPacker().pack(classPackerConfig);
+        String js = extractJs(url);
+        assertFalse(js.contains("$$"), "dollar-quoted body should not contain $$: " + js);
+        compileJs(js);
+        assertClassName(js, "le.gso.SzyHj.SOAPUtils$Proxy0$$Lambda$1");
+    }
+
+    /**
+     * 提取 $$..$$ 美元引用字符串中的 JS 源码，并还原 H2 连接串层面的 \; 转义
+     */
+    private String extractJs(String url) {
+        String body = url.substring(url.indexOf("$$") + 2, url.lastIndexOf("$$"));
+        return body.substring("//javascript\n".length()).replace("\\;", ";");
+    }
+
+    /**
+     * 只解析不执行，验证拼接后的 JS 语法仍然合法
+     */
+    private void compileJs(String js) throws Exception {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
+        assertNotNull(engine, "need a JDK with Nashorn to run this test");
+        ((Compilable) engine).compile(js);
+    }
+
+    /**
+     * 只执行 className 赋值语句，验证 $$ 拆分成 "$"+"$" 后仍能还原出原类名
+     */
+    private void assertClassName(String js, String expectedClassName) throws Exception {
+        ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
+        int start = js.indexOf("var className");
+        if (start < 0) {
+            throw new AssertionError("className assignment not found in: " + js);
+        }
+        engine.eval(js.substring(start, js.indexOf(';', start)));
+        assertEquals(expectedClassName, engine.get("className"));
+    }
+}