我已经通过 AJAX 使用AuthenticationEntryPoint和SimpleUrlAuthenticationSuccessHandler实现了用户身份验证。
现在，我需要将登录用户名输入到脚本变量中。
有人能帮我吗？

我的验证成功处理程序

public class MyAuthenticationSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
    private Log log = LogFactory.getLog(MyAuthenticationSuccessHandler.class);
    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
            Authentication authentication) throws IOException, ServletException {
        log.info("point-2-->"+authentication.getName()); //this prints what I need.
        // This is actually not an error, but an OK message. It is sent to avoid redirects.
        response.sendError(HttpServletResponse.SC_OK);
    }
}

我的JavaScript函数

$("#login").on('click', function(e) {
        e.preventDefault();
        $.ajax({url: getHost() + "/j_spring_security_check",
            type: "POST",
            beforeSend: function(xhr) {
                xhr.withCredentials = true;
            },
            data: $("#loginForm").serialize(),
            success: function(response, options) {
                    // We get a success from the server
                    //I need to get user name here
            },
            error: function(result, options) {
                    // We get a failure from the server...
                $(".error").remove();
                $('#j_username').before('<div class="error">Login failed, please try again.</div>');
        }
        });
    });

我已经为不同的问题附上了所有相关的文件。请访问下面的链接检查他们。
Spring Security; custom-filter and user-service-ref not working together