java如何遍历执行方法

需要使用反射:

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.*;

public class ReflectionDemo {

    public void a(String param) {
        System.out.println("do one thing: " + param );
    }

    public void b(String param) {
        System.out.println("do another thing: " + param);
    }

    public static void main(String[] args) {
        ReflectionDemo reflectionDemo = new ReflectionDemo();
        Map<String, String> methods = new HashMap<String, String>();
        methods.put("a", "someData");
        methods.put("b", "anotherData");

        for (Map.Entry<String, String> item : methods.entrySet()) {
            try {
                //getMethod第一个参数是函数名,后面的参数都是针对于目标方法的参数类型,没有参数就传null
                Method method = ReflectionDemo.class.getMethod(item.getKey(), String.class);
                //invoke第一个参数是一个对象的实例,后面跟进一堆参数列表,没有参数就传null
                method.invoke(reflectionDemo, item.getValue());
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }

}

输出
`
do one thing: someData
do another thing: anotherData
`