package org.entity;
import java.lang.reflect.Method;
/**
* 本案例示範如何通過反射将字元串轉換為類
* */
public class Test2_2 {
public static void main(String[] args) {
String user = "org.entity.User";//字元串是該類的全限定名
try {
Class clzz = Class.forName(user);
Object classObj=clzz.newInstance();//将class類轉換為對象
//--------------------反射類調用User中的sayHello()方法-----------------------------
//注意導入正确的Method包名:
// import java.lang.reflect.Method;
//參數是String
Method method = clzz.getMethod("sayHello",String.class);
method.invoke(classObj, "Hello wold");
//參數是其餘基本資料類型
/*Method method = clzz.getMethod("sayHello",int.class);
method.invoke(classObj, 52);*/
//注入double類型Method method = clzz.getMethod("sayHello",double.class);
/*Method method = clzz.getMethod("sayHello3",String[].class);
String[] ss=new String[]{"1","2","3"};
method.invoke(classObj, new Object[]{ss});*/
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}