我有一个JSP文件，该文件正在调用发REST往远程服务器的post调用。该请求正在处理中，但在远程计算机中处于挂起状态，状态为已取消。你能帮忙吗？

这是JSP的一部分：

<tr>
                <td><button id="registerBtn" onclick="registerClick()">Register</button></td>
                <td><button id="loginBtn" onclick="postOnClick()">Log in</button></td>
            </tr>
        </table>
        <script type='text/javascript'>
            function registerClick() {

                /* var params = "{realm: astra, subjectId: " + document.getElementById('usrInpt').value + " , authInfo: omsspass}"; */
                var first = document.getElementById('firstNameInpt').value;
                var last = document.getElementById('lastNameInpt').value;
                var user = document.getElementById('usrInpt').value;
                var password = document.getElementById('passInpt').value;
                var email = document.getElementById('emailInpt').value;

                var http = new XMLHttpRequest();

                var url = "http://localhost:8080/authJ/v0/authJ/users?realm=JOES_PIZZA&uid=" + user +"&firstname=" + first + "&lastname=" + last + "&password=" + password + "&email=" + email;

                //var params = "{realm: astra, subjectId: " + document.getElementById('usrInpt').value + " , authInfo: omsspass}";

                http.open("POST", url, true);
                //http.setRequestHeader("Content-type", "application/json");
                http.onreadystatechange = function() {
                    if (http.readyState == 4 && http.status == 200) {
                        document.open();
                        document.write(http.responseText);
                    }
                };
                http.send();
            }
        </script>`

这是java代码

:`@POST
    @Path("/users")
    public Response createUser(@QueryParam("uid")String uid, @QueryParam("firstname") String firstName, @QueryParam("lastname") String lastName, @QueryParam("email")String email,
            @QueryParam("password")String password, @QueryParam("realm") String realm) {
        //readProperties();
        String tokenID = getToken();
        StringBuffer openAmUrl = new StringBuffer().append("http://").append(openAmIp).append(openAmWarName).append("/identity/create?");
        openAmUrl.append("identity_name=").append(uid);
        openAmUrl.append("&identity_attribute_names=userpassword");
        openAmUrl.append("&identity_attribute_values_userpassword=").append(password);
        openAmUrl.append("&identity_attribute_names=sn");
        openAmUrl.append("&identity_attribute_values_sn=").append(lastName);
        openAmUrl.append("&identity_attribute_names=cn");
        openAmUrl.append("&identity_attribute_values_cn=").append(firstName);
        openAmUrl.append("&identity_realm=/").append(realm);
        openAmUrl.append("&identity_type=user");
        if (email != null){
            openAmUrl.append("&identity_attribute_names=mail");
            openAmUrl.append("&identity_attribute_values_mail=").append(email);
        }
        openAmUrl.append("&admin=").append(tokenID);

        URI uri = null;
        try {
            uri = new URI(openAmUrl.toString());
        } catch (URISyntaxException e) {
            LOGGER.error("Exception " + e);
            e.printStackTrace();
        }
        return Response.seeOther(uri).build();
    }
`

提前致谢！