package com.hx.mp.util;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import java.util.SortedMap;
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public class WXSignUtils {
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/**
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* 微信支付签名算法sign
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* @param characterEncoding
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* @param parameters
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* @return
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*/
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@SuppressWarnings("rawtypes")
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public static String createSign(String characterEncoding, SortedMap<Object,Object> parameters, String key){
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StringBuffer sb = new StringBuffer();
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Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）
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Iterator it = es.iterator();
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while(it.hasNext()) {
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Map.Entry entry = (Map.Entry)it.next();
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String k = (String)entry.getKey();
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Object v = entry.getValue();
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if(null != v && !"".equals(v)
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&& !"sign".equals(k) && !"key".equals(k)) {
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sb.append(k + "=" + v + "&");
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}
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}
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sb.append("key=" + key);
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String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
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return sign;
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}
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}
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