object BytecodeToASM {

    fun toASM(classPath: String){
        val inputStream = FileInputStream(classPath)
        val classReader = ClassReader(inputStream)

        val printWriter = PrintWriter(System.out)
        val traceClassVisitor = TraceClassVisitor(null, ASMifier(), printWriter)

        // ClassReader.SKIP_DEBUG and ClassReader.SKIP_FRAMES 去掉 Debug调试信息 和 字节码验证信息
        classReader.accept(traceClassVisitor, ClassReader.SKIP_DEBUG and ClassReader.SKIP_FRAMES)
    }

    fun toBytecodeByJavap(classPath: String) {
        val process = Runtime.getRuntime().exec("javap -v -p $classPath")
        val reader = BufferedReader(InputStreamReader(process.inputStream))

        reader.useLines { lines ->
            lines.forEach { println(it) }
        }
    }

}

fun main(args: Array<String>) {
    val classPath = ""

    println("----------以下是字节码 ----------")
    BytecodeToASM.toBytecodeByJavap(classPath)

    println("----------以下是ASM代码 ----------")
    BytecodeToASM.toASM(classPath)
}