Java ASM树API：如何预打印AbstractInstructionNode？

有什么简单的方法可以做到这一点吗？我看到了许多使用MethodVisitors的方法，以及不打印整个类文件的方法，但我所需要做的只是打印一条指令，希望是以一种好的方式

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我已经找到了用于打印操作码名称的操作码表，但是是否也提供了预打印内容的方法？

没有用于预打印方法字节码的ASM函数。您必须反复阅读指令并打印您想要的指令。

没有ASM函数来预打印方法字节码。您必须反复阅读这些说明并打印您想要的说明。

假设您有一些随机的AbstractInSnode:

AbstractInsnNode insnNode = new JumpInsnNode(Opcodes.IFLT, new LabelNode(new Label()));

然后你可以像这样漂亮地打印它：

/* Create a "printer" that renders text versions of instructions */
Printer printer = new Textifier();
TraceMethodVisitor methodPrinter = new TraceMethodVisitor(printer);

/* render the instruction as a string and add it to printer's internal buffer */
insnNode.accept(methodPrinter);

/* convert printer's internal buffer to string and clear the buffer (so we can reuse it later) */
StringWriter sw = new StringWriter();
printer.print(new PrintWriter(sw));
printer.getText().clear();
String insnNodeAsString = sw.toString();

/* print the string out */
System.out.print(insnNodeAsString);

在此示例中，InSnodeAsString将为：

"    IFLT L0\n"

i、 e.它在末端包括一个线路馈线

我们可以将所有这些打包成一个很好的实用程序类：

public class InsnPrinter {
  private static final Printer printer = new Textifier();
  private static final TraceMethodVisitor methodPrinter = new TraceMethodVisitor(printer);

  public static String prettyprint(AbsractInsnNode insnNode) {
    insnNode.accept(methodPrinter);
    StringWriter sw = new StringWriter();
    printer.print(new PrintWriter(sw));
    printer.getText().clear();
    return sw.toString();
  }
}

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假设您有一些随机的AbstractInSnode：

AbstractInsnNode insnNode = new JumpInsnNode(Opcodes.IFLT, new LabelNode(new Label()));

然后你可以像这样漂亮地打印它：

/* Create a "printer" that renders text versions of instructions */
Printer printer = new Textifier();
TraceMethodVisitor methodPrinter = new TraceMethodVisitor(printer);

/* render the instruction as a string and add it to printer's internal buffer */
insnNode.accept(methodPrinter);

/* convert printer's internal buffer to string and clear the buffer (so we can reuse it later) */
StringWriter sw = new StringWriter();
printer.print(new PrintWriter(sw));
printer.getText().clear();
String insnNodeAsString = sw.toString();

/* print the string out */
System.out.print(insnNodeAsString);

在此示例中，InSnodeAsString将为：

"    IFLT L0\n"

i、 e.它在末端包括一个线路馈线

我们可以将所有这些打包成一个很好的实用程序类：

public class InsnPrinter {
  private static final Printer printer = new Textifier();
  private static final TraceMethodVisitor methodPrinter = new TraceMethodVisitor(printer);

  public static String prettyprint(AbsractInsnNode insnNode) {
    insnNode.accept(methodPrinter);
    StringWriter sw = new StringWriter();
    printer.print(new PrintWriter(sw));
    printer.getText().clear();
    return sw.toString();
  }
}