wx md5

src/main/java/com/egolm/common/MD5Util.java

+package com.egolm.common;
+
+
+
+
+import java.security.MessageDigest;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+public class MD5Util {
+	/**
+	 * 签名算法sign
+	 * @param characterEncoding
+	 * @param parameters
+	 * @return
+	 */
+	@SuppressWarnings("unchecked")
+	public static String createSign(String characterEncoding,SortedMap<Object,Object> parameters){
+		StringBuffer sb = new StringBuffer();
+		Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）
+		Iterator it = es.iterator();
+		while(it.hasNext()) {
+			Map.Entry entry = (Map.Entry)it.next();
+			String k = (String)entry.getKey();
+			Object v = entry.getValue();
+			if(null != v && !"".equals(v)&& !"sign".equals(k) ) {
+				sb.append(k + "=" + v + "&");
+			}
+		}
+		sb.deleteCharAt(sb.length()-1);
+		System.out.println(sb.toString());
+		String sign = MD5Encode(sb.toString(), characterEncoding).toUpperCase();
+		return sign;
+	}
+	
+	private static String byteArrayToHexString(byte b[]) {
+		StringBuffer resultSb = new StringBuffer();
+		for (int i = 0; i < b.length; i++)
+			resultSb.append(byteToHexString(b[i]));
+
+		return resultSb.toString();
+	}
+
+	private static String byteToHexString(byte b) {
+		int n = b;
+		if (n < 0)
+			n += 256;
+		int d1 = n / 16;
+		int d2 = n % 16;
+		return hexDigits[d1] + hexDigits[d2];
+	}
+
+	public static String MD5Encode(String origin, String charsetname) {
+		String resultString = null;
+		try {
+			resultString = new String(origin);
+			MessageDigest md = MessageDigest.getInstance("MD5");
+			if (charsetname == null || "".equals(charsetname))
+				resultString = byteArrayToHexString(md.digest(resultString
+						.getBytes()));
+			else
+				resultString = byteArrayToHexString(md.digest(resultString
+						.getBytes(charsetname)));
+		} catch (Exception exception) {
+		}
+		return resultString;
+	}
+
+	private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
+			"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
+
+	
+	
+	public static void main(String[] args) {
+		
+ 		SortedMap<Object,Object> parameters = new TreeMap<Object,Object> (); 
+		parameters.put("smsType",  "cl");
+		parameters.put("mobile", "18607278529");
+		parameters.put("content", "验证码:123456");   
+		parameters.put("timestamp",  "1515462745539");
+		parameters.put("md5Key",  "E67720C4E7B84615D7EAF106EBC8E677");
+		 String createSign = MD5Util.createSign("UTF-8", parameters);
+		 System.out.println(createSign);
+		
+/*		String str = "lcN7013719";  //计算一个MD5KEY
+		System.out.println(MD5Encode(str,"UTF-8").toUpperCase());*/
+	} 
+	
+ 
+} 
+