fix(jdk21): for jdk21 springboot, the jar is under: jar:nested instead of jar:file.

Author: ed

build.gradle

@@ -30,7 +30,7 @@ compileTestJava.options.encoding = "UTF-8"
 apply plugin: 'maven-publish'
 
 group 'io.gitee.gaoxingliang:dbupgrader'
-version '0.1.5'
+version '0.1.6'
 sourceCompatibility = '1.8'
 targetCompatibility = '1.8'
 

dbupgrader-starter/build.gradle

@@ -30,7 +30,7 @@ compileTestJava.options.encoding = "UTF-8"
 apply plugin: 'maven-publish'
 
 group 'io.gitee.gaoxingliang:dbupgrader-starter'
-version '0.1.5'
+version '0.1.6'
 sourceCompatibility = '1.8'
 targetCompatibility = '1.8'
 

src/main/java/io/github/gaoxingliang/dbupgrader/utils/ReflectionUtils.java

@@ -52,7 +52,11 @@ private static void findClassesInDir(File directory, String packageName, List<Cl
 
     private static void findClassesInJar(URL resource, String path, String packageName, List<Class> classes) throws IOException,
             ClassNotFoundException {
-        String jarPath = resource.getPath().substring(5, resource.getPath().indexOf("!"));
+        // two cases: (note: "jar" is in the protocol. path is like: file://xxxx or nested://xxx)
+        // 1. jar:file:/path/to/jar!/
+        // 2. jar:nested:/path/to/jar!/BOOT-INF/classes!/
+        int realPathStartIndex = resource.getPath().indexOf(":");
+        String jarPath = resource.getPath().substring(realPathStartIndex + 1, resource.getPath().indexOf("!"));
         JarFile jar = new JarFile(URLDecoder.decode(jarPath, StandardCharsets.UTF_8.name()));
 
         Enumeration<JarEntry> entries = jar.entries();