如何使用反射定义动态setter和getter？ [英] How to define dynamic setter and getter using reflection?

问题描述

我有一个来自资源包的循环中的类的字符串，字段名称列表。我创建一个对象然后使用循环我想为该对象设置值。例如，对象

I've a list of strings, field names, of a class in a loop from resource bundle. I create an object and then using loop i want to set values for that object. For example, for object

Foo f = new Foo();

和参数的param1，我有字符串 参数1 和我某种程度上想concate 设定 与它比如set+param1然后将它应用于f实例：

with parameter param1, I have string "param1" and I somehow want to concate "set" with it like "set"+"param1" and then apply it on f instance as:

f.setparam1("value");

和getter相同。我知道反思会有所帮助，但我无法做到。
请帮忙。谢谢！

and same for getter. I know reflection will help but I couldn't manage to do it. Please help. Thanks!

推荐答案

你可以这样做。您可以将此代码更通用的，因此，你可以使用它的循环中的字段：

You can do something like this. You can make this code more generic so that you can use it for looping on fields:

Class aClass = f.getClass();
Class[] paramTypes = new Class[1];
paramTypes[0] = String.class; // get the actual param type

String methodName = "set" + fieldName; // fieldName String
Method m = null;
try {
    m = aClass.getMethod("confirmMsg", paramTypes);
} catch (NoSuchMethodException nsme) {
    nsme.printStackTrace();
}

try {
    String result = (String) m.invoke(f, fieldValue); // field value
    System.out.println(result);
} catch (IllegalAccessException iae) {
    iae.printStackTrace();
} catch (InvocationTargetException ite) {
    ite.printStackTrace();
}

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