src/org/nutz/lang/Files.java
public static String renamePath(String path, String newName) {
        if (!Strings.isBlank(path)) {
            int pos = path.replace('\\', '/').lastIndexOf('/');
            if (pos > 0)
                return path.substring(0, pos) + "/" + newName;
        }
        return newName;
    }
public static String renamePath(String path, String newName) {
        if (!Strings.isBlank(path)) {
            int pos = path.replace('\\', '/').lastIndexOf('/');
            if (pos > 0)
                return path.substring(0, pos) + "/" + newName;
        }
        return newName;
    }
修改路径

@param path
路径
@param newName
新名称
@return 新路径