package com.xcong.excoin.common.utils;
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import java.security.MessageDigest;
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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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/**
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* 处理请求数据
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* @author submail
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*
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*/
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public class RequestEncoder {
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private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5',
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'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
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public static final String MD5 = "MD5";
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public static final String SHA1 = "SHA1";
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/**
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* 编码的字符串
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*
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* @param algorithm
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* @param str
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* @return String
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*/
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public static String encode(String algorithm, String str) {
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if (str == null) {
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return null;
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}
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try {
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MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
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messageDigest.update(str.getBytes("UTF-8"));
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return getFormattedText(messageDigest.digest());
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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/**
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*获取原始字节并将其格式化。
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* @param bytes
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* the raw bytes from the digest.
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* @return the formatted bytes.
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*/
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private static String getFormattedText(byte[] bytes) {
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int len = bytes.length;
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StringBuilder buf = new StringBuilder(len * 2);
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for (int j = 0; j < len; j++) { buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);
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buf.append(HEX_DIGITS[bytes[j] & 0x0f]);
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}
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return buf.toString();
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}
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public static String formatRequest(Map<String, Object> data){
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Set<String> keySet = data.keySet();
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Iterator<String> it = keySet.iterator();
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StringBuffer sb = new StringBuffer();
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while(it.hasNext()){
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String key = it.next();
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Object value = data.get(key);
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if(value instanceof String){
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sb.append(key + "=" + value + "&");
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}
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}
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if(sb.length() != 0){
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return sb.substring(0, sb.length() - 1);
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}
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return null;
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}
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}
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