java 反射动态方法调用

import java.lang.reflect.Method;

public class Dynamic {
public static void main(String[] args) throws Exception {
Class c = Dynamic.class;// 得到对象
Method[] methods = c.getDeclaredMethods();// 得到方法

for (Method method : methods) {
System.out.println(method.getName());// 打印参数名
Class[] parameterTypes = method.getParameterTypes();
for (int i = 0; i < parameterTypes.length; i++) {
String nameString = parameterTypes[i].getName();
System.out.println("parameterType:" + nameString);// 打印方法参数类型
}

System.out.println("ReturnType:" + method.getReturnType());
}

Object obj = c.newInstance();// 获取到方法对象,假设方法的参数是一个int,String,method名为getAge
Method sAge = c.getMethod("getAge", new Class[] { int.class,String.class });
Object[] arguments = new Object[] { new Integer(23), new String("abc") };
String s = (String) sAge.invoke(obj, arguments);
System.out.print(s);
}

public String getAge(int age, String name) {
return name + ": " + age;
}

}