URLEncoder.encode问题

遇到java里的URLEncoder.encode方法编码后与javascript的encodeURIComponent方法的结果有点不一样，找了一下资料，原来URLEncoder实现的是HTML形式的规范，jdk文档里这么说：

Utility class for HTML form encoding. This class contains static methods for converting a String to the application/x-www-form-urlencoded MIME format.

看到aliyun-oss-sdk的HttpUtil里是这么做的：

    /**
     * Encode a URL segment with special chars replaced.
     */
    public static String urlEncode(String value, String encoding) {
        if (value == null) {
            return "";
        }
        
        try {
            String encoded = URLEncoder.encode(value, encoding);
            return encoded.replace("+", "%20").replace("*", "%2A")
                    .replace("~", "%7E").replace("/", "%2F");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException(OSS_RESOURCE_MANAGER.getString("FailedToEncodeUri"), e);
        }
    }

参考：
URLEncoder not able to translate space character