import java.lang.reflect.Method;
public class testReflect {
/**
* @param args
*/
public static void main(String[] args) {
try {
Wu w=new Wu();
Object[] argspara=new Object[]{};
testReflect.invokeMethod(w, "outInfo",argspara);
argspara=new Object[]{"wu"};
testReflect.invokeMethod(w, "outInfo",argspara);
argspara=new Object[]{"wu",2};
testReflect.invokeMethod(w, "outInfo",argspara);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 反射调用方法
* @param newObj 实例化的一个对象
* @param methodName 对象的方法名
* @param args 参数数组
* @return 返回值
* @throws Exception
*/
public static Object invokeMethod(Object newObj, String methodName, Object[] args)throws Exception {
Class ownerClass = newObj.getClass();
Class[] argsClass = new Class[args.length];
for (int i = 0, j = args.length; i < j; i++) {
argsClass[i] = args[i].getClass();
}
Method method = ownerClass.getMethod(methodName, argsClass);
return method.invoke(newObj, args);
}
}
class Wu{
public void outInfo() {
System.out.println("Wu.outInfo");
}
public void outInfo(String s) {
System.out.println("Wu.outInfo(String s):"+s);
}
public void outInfo(String s,Integer n) {
System.out.println("Wu.outInfo(String s,int n):"+s+n);
}
}