java反射工具类

package com.example.test;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import android.util.Log;

public class ClsUtils {
	private static final String TAG = "XXX";

	/**
	 * 
	 * @param className
	 *            需要反射类的名字
	 * @return
	 * @throws ClassNotFoundException
	 */
	public static Class creatClassObject(String className)
			throws ClassNotFoundException {
		Class cls = Class.forName(className);
		return cls;
	}

	/**
	 * 
	 * @param cls
	 *            反射类
	 * @param key
	 *            系统属性key值
	 * @param val
	 *            key对应的value值
	 */
	public static void setSystemProperties(Class cls, String key, String val) {
		try {
			Method hideMethod = cls.getMethod("set", new Class[] {
					String.class, String.class });
			Object object = cls.newInstance();
			hideMethod.invoke(object, new Object[] { new String(key),
					new String(val) });
			Log.e(TAG, "111111111111111111");
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 得到系统属性key值对应的value值
	 * 
	 * @param cls
	 *            反射类
	 * @param key
	 *            系统属性key值
	 * @return
	 */
	public static String getSystemProperties(Class cls, String key) {
		String value = null;
		try {
			Method hideMethod = cls.getMethod("get", String.class);
			Object object = cls.newInstance();
			value = (String) hideMethod.invoke(object, key);
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
		return value;
	}

	/**
	 * 查看反射类的 所有方法和常量
	 * 
	 * @param cls
	 */
	static public void printMethod(Class cls) {
		Log.e(TAG, "--------printMethod-------");
		Method[] hideMethod = cls.getMethods();
		// 取得所有方法
		int i = 0;
		for (i = 0; i < hideMethod.length; i++) {
			Log.e(TAG, hideMethod[i].getName().toString());
		}
		Log.e(TAG, "--------print static var-------");
		// 取得所有常量
		Field[] allFields = cls.getFields();
		for (i = 0; i < allFields.length; i++) {
			Log.e(TAG, allFields[i].getName());
		}
	}
}