1

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

@@ -17,6 +17,28 @@ import java.util.TreeMap;
 
 public class MD5Util {
 	private final static Logger logger = LoggerFactory.getLogger(MD5Util.class);
+	
+	
+	public static String createSign_allowNull(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()) {
+			Entry<?, ?> entry = (Entry<?, ?>)it.next();
+			String k = (String)entry.getKey();
+			Object v = entry.getValue();
+			if( !"sign".equals(k) ) { 
+				sb.append(k + "=" + v + "&");
+			}
+		}
+		sb.deleteCharAt(sb.length()-1);
+		System.out.println("签名的字符串:"+sb.toString());
+		logger.info("签名的字符串:  {}",sb.toString());
+		String sign = MD5Encode(sb.toString(), characterEncoding).toUpperCase();
+		return sign;
+	}
+	
+	
 	/**
 	 * 签名算法sign
 	 * @param characterEncoding