Groovy可以复制类签名但修改实现

import groovy.lang.GroovyClassLoader

def originalClass = MyClass
def newClass = new GroovyClassLoader().parseClass(originalClass.getName())

// 获取类签名
def originalSig = originalClass.declaredMethods.find { it.name }

// 复制类签名
newClass.declaredMethods.each { method ->
    def newMethod = method.copy() as Method
    newMethod.name = method.name
    newMethod.signature = originalSig
}

import groovy.lang.GroovyShell

def originalClass = MyClass
def newClass = new GroovyClassLoader().parseClass(originalClass.getName())

// 获取类实现
def originalImpl = originalClass.newInstance()

// 创建 GroovyShell 对象
def shell = new GroovyShell()

// 解析并替换实现
def newImpl = shell.evaluate(originalImpl.source)

// 将新实现设置给类
newClass.newInstance().source = newImpl

import groovy.lang.Mixin

mixin MyMixin {}

mixin(MyMixin)

def originalClass = MyClass
def newClass = new GroovyClassLoader().parseClass(originalClass.getName())

// 获取类实现
def originalImpl = originalClass.newInstance()

// 创建 GroovyShell 对象
def shell = new GroovyShell()

// 解析并替换实现
def newImpl = shell.evaluate(originalImpl.source)

// 将新实现设置给类
newClass.newInstance().source = newImpl