如何重命名 jar 文件中的类
public static void main(String[] args) throws Exception {
File jarFile = new File("Input.jar");
Map<String, ClassNode> nodes = JarUtils.loadClasses(jarFile);
Map<String, byte[]> out = JarUtils.loadNonClassEntries(jarFile);
Map<String, String> mappings = new HashMap<String, String>();
mappings.put("me/example/ExampleClass", "me/example/ExampleRenamed");
out.putAll(process(nodes, mappings));
JarUtils.saveAsJar(out, "Input-new.jar");
}
static Map<String, byte[]> process(Map<String, ClassNode> nodes, Map<String, String> mappings) {
Map<String, byte[]> out = new HashMap<String, byte[]>();
Remapper mapper = new SimpleRemapper(mappings);
for (ClassNode cn : nodes.values()) {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
ClassVisitor remapper = new ClassRemapper(cw, mapper);
cn.accept(remapper);
out.put(mappings.containsKey(cn.name) ? mappings.get(cn.name) : cn.name, cw.toByteArray());
}
return out;
}
SimpleRemapper 是 ASM 库中的现有类。但是它只允许更改类名。如果要重命名字段和方法,则应创建自己的 Remapper 类实现。