试试这个:

def cl = Class.forName("org.package.Foo")
cl.get(1)

有点长，但应该可以工作.

A little bit longer but should work.

如果你想为静态方法创建类似switch"的代码，我建议实例化类(即使它们只有静态方法)并将实例保存在地图中.然后你可以使用

If you want to create "switch"-like code for static methods, I suggest to instantiate the classes (even if they have only static methods) and save the instances in a map. You can then use

map[name].get(1)

选择其中之一.

"$name" 是一个 GString，因此是一个有效的语句."$name".foo() 表示调用GString类的方法foo().

"$name" is a GString and as such a valid statement. "$name".foo() means "call the method foo() of the class GString.

使用 Web 容器(如 Grails)时，您必须指定类加载器.有两种选择:

When using a web container (like Grails), you have to specify the classloader. There are two options:

Class.forName("com.acme.MyClass", true, Thread.currentThread().contextClassLoader)

或

Class.forName("com.acme.MyClass", true, getClass().classLoader)

第一个选项仅适用于 Web 上下文，第二个方法也适用于单元测试.这取决于您通常可以使用与调用 forName() 的类相同的类加载器.

The first option will work only in a web context, the second approach also works for unit tests. It depends on the fact that you can usually use the same classloader as the class which invokes forName().

如果你有问题，那么使用第一个选项并在你的单元测试中设置contextClassLoader:

If you have problems, then use the first option and set the contextClassLoader in your unit test:

def orig = Thread.currentThread().contextClassLoader
try {
    Thread.currentThread().contextClassLoader = getClass().classLoader

    ... test ...
} finally {
    Thread.currentThread().contextClassLoader = orig
}