详解java中反射机制（含数组参数）

/**
 * @(#)TestInt.java
 * 
 * @author soda E-mail:sujun10@21cn.com
 * @version 1.0
 * <br>Copyright (C), 2007 soda.C
 * <br>This program is protected by copyright laws.
 * <br>Date:2007.4
 */
import java.lang.reflect.Method;

public class TestInt 
{
  //测试方法
  public String test(String name,int i)
  {
    System.out.println("name:" + name);
    System.out.println(i);
    return "反射成功!";
  }

  public static void main(String[] args)
  {
    try
    {
      //获取class文件，可以Class.for("Test")获取，这样也可以根据字符串生成类啦
      Class te = TestInt.class;
      Class[] cl = new Class[2];
      //添加参数类型
      cl[0] = String.class;
      cl[1] = int.class;
      System.out.println("11111111");
      //根据public的方法，以及参数，参数是Class[]形式
      Method method = te.getMethod("test", cl);
      System.out.println("222222222222");
      //开始填充参数
      Object[] params = new Object[2];
      //params[0] = new String("soda");
      params[0] = new String("soda");
      params[1] = new Integer(23);
      System.out.println("22222222222");
      //获取该class的实例
      Object obj = te.newInstance();
      //进行方法调用
      Object result = method.invoke(obj, params);
      System.out.println("结果:" + result);
    }
    catch (Exception e)
    {
      System.out.println(e);
    }
    
  }
}

/**
 * @(#)Test.java
 * 
 * @author soda E-mail:sujun10@21cn.com
 * @version 1.0
 * <br>Copyright (C), 2007 soda.C
 * <br>This program is protected by copyright laws.
 * <br>Program Name:FlashSyncServer
 * <br>Date:2007.1
 */
import java.lang.reflect.Method;
//这里我就不做什么解释了，和前面的几乎一样，大家也可以自己去查查api，Class类的api
public class Test 
{
  public void test(double[] dou)
  {
    System.out.println(dou.length);
    System.out.println(dou[0]);
  }
  public static void main(String[] args) throws Exception
  {
    try
    {
      Class[] cl = new Class[1];
      cl[0] = double[].class;
      System.out.println("cl[0]:" + cl[0]);
      Object[] in = new Object[1];
      //注意这里，不是Double[]，而是double[]。这里不能用对象数组
      double[] db = new double[1];
      db[0] = 100.0;
      in[0] = db;
      Class te = Test.class;
      Method method = te.getMethod("test", cl);
      Object obj = te.newInstance();
      Object objs = method.invoke(obj, in);
    }
    catch (Exception e)
    {
      System.out.println(e);
    }
    
  }
}