把map的key转换成驼峰命名

package com.talkweb.utils;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
public class CommTool {
/**
* 把map的key转换成驼峰命名
* @param map
* @return
*/
public static Map<String, Object> toReplaceKeyLow(Map<String, Object> map) {
Map re_map = new HashMap();
if (re_map != null) {
Iterator var2 = map.entrySet().iterator();
while (var2.hasNext()) {
Entry<String, Object> entry = (Entry) var2.next();
re_map.put(underlineToCamel((String) entry.getKey()), map.get(entry.getKey()));
}
map.clear();
}
return re_map;
}
public static final char UNDERLINE = '_';
public static String underlineToCamel(String param) {
if (param == null || "".equals(param.trim())) {
return "";
}
int len = param.length();
StringBuilder sb = new StringBuilder(len);
for (int i = 0; i < len; i++) {
char c = param.charAt(i);
if (c == UNDERLINE) {
if (++i < len) {
sb.append(Character.toUpperCase(param.charAt(i)));
}
} else {
sb.append(Character.toLowerCase(param.charAt(i)));
}
}
return sb.toString();
}
}