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package com.lorne.weixin.pay.util;


import com.lorne.core.framework.utils.encode.MD5Util;

import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;

/**
 * User: rizenguo Date: 2014/10/29 Time: 15:23
 */
public class Signature {
	/**
	 * 签名算法
	 * 
	 * @param o 	要参与签名的数据对象
	 * @param key   key
	 * @return 签名
	 * @throws IllegalAccessException IllegalAccessException
	 */
	public static String getSign(Object o,String key) throws IllegalAccessException {
		ArrayList list = new ArrayList();
		Class cls = o.getClass();
		Field[] fields = cls.getDeclaredFields();
		for (Field f : fields) {
			f.setAccessible(true);
			if (f.get(o) != null && f.get(o) != "") {
				list.add(f.getName() + "=" + f.get(o) + "&");
			}
		}
		int size = list.size();
		String[] arrayToSort = list.toArray(new String[size]);
		Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < size; i++) {
			sb.append(arrayToSort[i]);
		}
		String result = sb.toString();
		result += "key=" + key;
		try {
			result = MD5Util.md5(result.getBytes("utf-8")).toUpperCase();
		} catch (UnsupportedEncodingException e) {
			return null;
		}
		return result;
	}

	public static String getSign(Map map,String key) {
		ArrayList list = new ArrayList();
		for (Map.Entry entry : map.entrySet()) {
			if (entry.getValue() != "") {
				list.add(entry.getKey() + "=" + entry.getValue() + "&");
			}
		}
		int size = list.size();
		String[] arrayToSort = list.toArray(new String[size]);
		Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < size; i++) {
			sb.append(arrayToSort[i]);
		}
		String result = sb.toString();
		result += "key=" + key;
		try {
			result = MD5Util.md5(result.getBytes("utf-8")).toUpperCase();
		} catch (UnsupportedEncodingException e) {
			return null;
		}
		return result;
	}

}