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853天前import java.lang.reflect.Constructor; |
import java.lang.reflect.Method; |
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public class ReflectTest |
{ |
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public class Worker{ |
private String name = ""; |
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public void setName(String name){ |
this.name = name; |
} |
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public void work(){ |
System.out.println("worker "+name+" will work"); |
} |
} |
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public static class SWorker{ |
private String name = ""; |
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public void setName(String name){ |
this.name = name; |
} |
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public void work(){ |
System.out.println("s worker "+name+" will work"); |
} |
} |
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public static void main(String[] args) |
{ |
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try{ |
/* |
* 非静态内部类 |
*/ |
ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
//加载内部类名称的写法【包路径.主类名$内部类名】 |
Class clWorker = loader.loadClass("ReflectTest$Worker"); |
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//通过以下输出语句可以看到，内部类的构造函数需要外部类做参数 |
System.out.println("worker's cons is:"+clWorker.getDeclaredConstructors()[0]); |
Constructor cons = clWorker.getDeclaredConstructor(ReflectTest.class); |
Worker worker = (Worker)cons.newInstance(new ReflectTest()); |
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Method setMethod = clWorker.getMethod("setName",String.class); |
setMethod.invoke(worker,"张三"); |
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Method workMethod = clWorker.getMethod("work"); |
workMethod.invoke(worker); |
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/* |
* 静态内部类 |
*/ |
Class clSWorker = loader.loadClass("ReflectTest$SWorker"); |
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//获取构造方法不需要加额外参数 |
Constructor cons1 = clSWorker.getDeclaredConstructor(); |
SWorker sWorker = (SWorker)cons1.newInstance(); |
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setMethod = clSWorker.getMethod("setName",String.class); |
setMethod.invoke(sWorker,"李四"); |
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workMethod = clSWorker.getMethod("work"); |
workMethod.invoke(sWorker); |
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}catch(Exception e){ |
e.printStackTrace(); |
} |
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} |
} |
