如何使用Java对String进行编码以获得与PHP

Question

我有一个PHP函数，它使用saml / xml编码字符串作为内容：

function encodeSamlRequest($samlRequest) {
    return addslashes(rawurlencode(base64_encode(gzdeflate($samlRequest))));
}

我创建了可以产生相同输出的Java方法：

private String encodeRequest(String samlRequest) {
    byte[] samlRequestBytes = samlRequest.getBytes();

    // gzdeflate
    Deflater compressor = new Deflater();
    compressor.deflate(samlRequestBytes);

    // base64_encode
    byte[] encodedDeflatedSamlRequest = Base64.getEncoder().encode(samlRequestBytes);

    // rawurlenccode
    String encodedSamlRequest = null;
    try {
        encodedSamlRequest = URLEncoder.encode(new String(encodedDeflatedSamlRequest), "UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    return encodedSamlRequest;
}

private byte[] toByteArray(int value) {
    return new byte[]{
            (byte) (value >> 24),
            (byte) (value >> 16),
            (byte) (value >> 8),
            (byte) value};
}

我尝试使用Deflater，Base64.Encoder，URIEncoder和URI类（最后两个没有网址，因为我的声誉＆lt; 10），但输出完全不同。

测试输入：

<samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="_e48eec122b20b6b83702" Version="2.0" IssueInstant="2017-09-28T13:54:16Z" Destination="https://hetman-int.epuap.gov.pl/DracoEngine2/draco.jsf" IsPassive="false" AssertionConsumerServiceURL="http://localhost:8085/index.jsp"><saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">/test12/myapp-12423534</saml:Issuer></samlp:AuthnRequest>

预期产出：

fVHJbsIwEP2VyPfEiRMgtUgkVHpAolIFLYdeKhMG4ioZux4H0b%2BvA6pELz3O8pZ5MyfVd1YuBt%2FiBr4GIB9d%2Bg5JXgcVGxxKo0iTRNUDSd%2FI7eJ5LUWSSuuMN43pWLRaVuwDihKgyYTYi3Q%2F3Zf5LBUs2oEjbbBiAREWiQZYIXmFPrTSbBanD7EoX7NcTgqZTd9ZtAwmNCp%2FRbXeW5Kct%2BB7hbFGn4AdlE1O5pzYji%2BdaswTnjSC4IexSD7pOAq9KCJ9hoodVUfAogURuJH00SANPbgtuLNu4G2zvskElc40qmsNeVmm5YRrPMAl8FlWz8c85NW%2Bu0vo%2F4DUrySruQ9XZYL338raOBOFyCd5Med3tPWt%2BvuN%2Bgc%3D

我的输出：

eJxhbWxwOkF1dGhuUmVxdWVzdCB4bWxuczpzYW1scD0idXJuOm9hc2lzOm5hbWVzOnRjOlNBTUw6Mi4wOnByb3RvY29sIiBJRD0iX2U0OGVlYzEyMmIyMGI2YjgzNzAyIiBWZXJzaW9uPSIyLjAiIElzc3VlSW5zdGFudD0iMjAxNy0wOS0yOFQxMzo1NDoxNloiIERlc3RpbmF0aW9uPSJodHRwczovL2hldG1hbi1pbnQuZXB1YXAuZ292LnBsL0RyYWNvRW5naW5lMi9kcmFjby5qc2YiIElzUGFzc2l2ZT0iZmFsc2UiIEFzc2VydGlvbkNvbnN1bWVyU2VydmljZVVSTD0iaHR0cDovL2xvY2FsaG9zdDo4MDg1L3N1Y2Nlc3MuanNwIj48c2FtbDpJc3N1ZXIgeG1sbnM6c2FtbD0idXJuOm9hc2lzOm5hbWVzOnRjOlNBTUw6Mi4wOmFzc2VydGlvbiI%2BL3Rlc3Rwbi9Eb215nGxuYS0xNDk2MDM0NjAyOTA5PC9zYW1sOklzc3Vlcj48L3NhbWxwOkF1dGhuUmVxdWVzdD4%3D

任何建议或想法？谢谢你的帮助。