src/org/nutz/el/parse/Converter.java
private boolean skipSpace() {
        boolean space = false;
        while (!exp.isEmpty() && Character.isWhitespace(exp.peek())) {
            space = true;
            exp.poll();
        }
        return space;
    }
private boolean skipSpace() {
        boolean space = false;
        while (!exp.isEmpty() && Character.isWhitespace(exp.peek())) {
            space = true;
            exp.poll();
        }
        return space;
    }
跳过空格,并返回是否跳过空格(是否存在空格)