优化StringUtils.camelCase驼峰命名法转换，不允许第二个字符是大写，因为这样会造成bean引用失败

common/src/main/java/com/jeesite/common/lang/StringUtils.java

@@ -250,16 +250,14 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
         if (s == null) {
             return null;
         }
-
         s = s.toLowerCase();
-
         StringBuilder sb = new StringBuilder(s.length());
         boolean upperCase = false;
         for (int i = 0; i < s.length(); i++) {
             char c = s.charAt(i);
 
             if (c == SEPARATOR) {
-                upperCase = true;
+                upperCase = i != 1; // 不允许第二个字符是大写
             } else if (upperCase) {
                 sb.append(Character.toUpperCase(c));
                 upperCase = false;
@@ -267,7 +265,6 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
                 sb.append(c);
             }
         }
-
         return sb.toString();
     }
 
@@ -297,18 +294,14 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
         if (s == null) {
             return null;
         }
-
         StringBuilder sb = new StringBuilder();
         boolean upperCase = false;
         for (int i = 0; i < s.length(); i++) {
             char c = s.charAt(i);
-
             boolean nextUpperCase = true;
-
             if (i < (s.length() - 1)) {
                 nextUpperCase = Character.isUpperCase(s.charAt(i + 1));
             }
-
             if ((i > 0) && Character.isUpperCase(c)) {
                 if (!upperCase || !nextUpperCase) {
                     sb.append(SEPARATOR);
@@ -317,10 +310,8 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils {
             } else {
                 upperCase = false;
             }
-
             sb.append(Character.toLowerCase(c));
         }
-
         return sb.toString();
     }