我的名字Space在哪里消失在SOAP Header中？

Question

我正在尝试设置子节点的命名空间，但它们没有设置

    public static final String WSSE_NS = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
    public static final String PWD_TEXT_TYPE = "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordText";
    public static final String WSSE_SECURITY_NAME = "Security";
    public static final String WSSE_NS_PREFIX = "wsse";


SOAPElement securityName = envelope.getHeader().addChildElement(WSSE_SECURITY_NAME, WSSE_NS_PREFIX, WSSE_NS);

SOAPElement userNameToken = securityName.addChildElement("Usernametoken", WSSE_NS_PREFIX, WSSE_NS);

SOAPElement usernameNS = userNameToken.addChildElement("UserName", WSSE_NS_PREFIX, WSSE_NS);

这个输出是：

 <SOAP-ENV:Header>
    <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" mustUnderstand="1">
    <wsse:Usernametoken>
            <wsse:UserName></wsse:UserName>
        </wsse:Usernametoken>
    </wsse:Security>
</SOAP-ENV:Header>

命名空间刚刚消失:(