反射的简单示例

反射 通过java类获悉其它类的细节~

1通过对象 得到所属类2 加载类

package test.reflect;

import java.lang.reflect.*;

/** * //具体应用 return (Example) this.getHibernateTemplate().get(Example.class, id); * 反射就是在框架中会用到的更多~~ */public class ReflectTest {

 public static void main(String[] args) {  Class inspect;  try {   Integer k1 = 1;   // k1是对象   Class c1 = k1.getClass();   System.out.println(c1);   // 类名   Class c2 = Integer.class;   System.out.println(c2);   // 类中的明细   inspect = Class.forName("java.lang.Long");

   Method[] methods = inspect.getDeclaredMethods();   for (int i = 0; i < methods.length; i++) {    Method method = methods[i];    // 返回类型    Class returnVal = method.getReturnType();    // 得到方法是 public private 类型    int mods = returnVal.getModifiers();    String modVal = Modifier.toString(mods);    // 参数    Class[] params = method.getParameterTypes();

    System.out.println("Method:" + method.getName());    System.out.println("modifiers:" + modVal);    System.out.println("return type :" + returnVal);    for (int j = 0; j < params.length; j++) {     System.out.println("params:" + params[j].toString());    }    System.out      .println("-------------------------------------------");   }

  } catch (ClassNotFoundException e) {   // TODO Auto-generated catch block   e.printStackTrace();  } }

}