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SHA1签名工具类java
package com.net.util; import java.security.MessageDigest; import java.util.Iterator; import java.util.Map; import java.util.Random; import java.util.Set; import java.util.SortedMap; /* ‘============================================================================ ‘api说明: ‘createSHA1Sign创建签名SHA1 ‘getSha1()Sha1签名 ‘============================================================================ ‘*/ public class Sha1Util { public static String getNonceStr() { Random random = new Random(); return MD5Util.MD5Encode(String.valueOf(random.nextInt(10000)), "UTF-8"); } public static String getTimeStamp() { return String.valueOf(System.currentTimeMillis() / 1000); } //创建签名SHA1 public static String createSHA1Sign(SortedMap<String, String> signParams) throws Exception { StringBuffer sb = new StringBuffer(); Set es = signParams.entrySet(); Iterator it = es.iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); String k = (String) entry.getKey(); String v = (String) entry.getValue(); sb.append(k + "=" + v + "&"); //要采用URLENCODER的原始值! } String params = sb.substring(0, sb.lastIndexOf("&")); // System.out.println("sha1之前:" + params); // System.out.println("SHA1签名为:"+getSha1(params)); return getSha1(params); } //Sha1签名 public static String getSha1(String str) { if (str == null || str.length() == 0) { return null; } char hexDigits[] = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘ }; try { MessageDigest mdTemp = MessageDigest.getInstance("SHA1"); mdTemp.update(str.getBytes("UTF-8")); byte[] md = mdTemp.digest(); int j = md.length; char buf[] = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) { byte byte0 = md[i]; buf[k++] = hexDigits[byte0 >>> 4 & 0xf]; buf[k++] = hexDigits[byte0 & 0xf]; } return new String(buf); } catch (Exception e) { return null; } } }
SHA1签名工具类java
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