通过Java反射调用方法

通过Java反射调用方法
 
这是个测试用的例子，通过反射调用对象的方法。
 
 
TestRef.java
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
/**
* Created by IntelliJ IDEA.
* File: TestRef.java
* User: leizhimin
* Date: 2008-1-28 14:48:44
*/
public class TestRef {
    public static void main(String args[]) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
        Foo foo = new Foo("这个一个Foo对象！");
        Class clazz = foo.getClass();
        Method m1 = clazz.getDeclaredMethod("outInfo");
        Method m2 = clazz.getDeclaredMethod("setMsg", String.class);
        Method m3 = clazz.getDeclaredMethod("getMsg");
        m1.invoke(foo);
        m2.invoke(foo, "重新设置msg信息！");
        String msg = (String) m3.invoke(foo);
        System.out.println(msg);
    }
}
class Foo {
    private String msg;
    public Foo(String msg) {
        this.msg = msg;
    }
    public void setMsg(String msg) {
        this.msg = msg;
    }
    public String getMsg() {
        return msg;
    }
    public void outInfo() {
        System.out.println("这是测试Java反射的测试类");
    }
}
 
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