src/main/java/com/hx/util/rsa/RSASignature.java
@@ -137,7 +137,7 @@ for(int i = 0; i < keys.size(); ++i) { String key = (String)keys.get(i); Object value = params.get(key); if(value != null){ if(value == null || StringUtils.isEmpty(value.toString())){ continue; } content.append(i == 0 ? "" : "&").append(key).append("=").append(value);