调用容器来做认证，我这边搞不定。 建议你们这边还是调用我们提供的接口来做。如果你们坚持想调用使用容器来做认证，可以参考下面方法。
找了一段调用tomcat6容器做认证的方法，但是只支持tomcat6，不怎么适用。其他版本都不怎么支持authenticate这个方法，如果你们这边还需要用下面方式，这个需要你们自己去研究了。
public boolean authenticate(String user, String pwd,HttpServletRequest request, HttpServletResponse response) {try{Class<?> clz = Class.forName("org.apache.catalina.ServerFactory");Method getServerMethod = clz.getMethod("getServer", new Class[]{});Object server = getServerMethod.invoke(clz, new Object[]{});Class<?> serverClz = server.getClass();Method findServiceMethod = serverClz.getMethod("findService", new Class[]{String.class});Object service = findServiceMethod.invoke(server, new Object[]{"Catalina"});Class<?> serviceClz = service.getClass();Method getContainerMethod = serviceClz.getMethod("getContainer", new Class[]{});Object container = getContainerMethod.invoke(service, new Object[]{});Class<?> containerClz = container.getClass();Method getRealmMethod = containerClz.getMethod("getRealm", new Class[]{});Object realm = getRealmMethod.invoke(container, new Object[]{});Class<?> realmClz = realm.getClass();Method authenticateMethod = realmClz.getMethod("authenticate", new Class[]{String.class,String.class});Object principal = authenticateMethod.invoke(realm, new Object[]{user,pwd});if(principal == null){return false;}return true;}catch(Throwable e){LoggerUtil.info("authenticate exception:" + e.getMessage(),e);return false;}}

Weblogic 登录认证
Object result = null;try {// 5、授权认证，登录的是虚拟用户，而不是umCode// weblogic10版本升级，weblogic.servlet.security.ServletAuthentication.login方法在wls8和wls10下参数个数不一样，需做反射处理// 待weblogic8环境下线以后，该方法需修改成weblogic8方法的判断Method meth = null;try {meth = Object.class.forName("weblogic.servlet.security.ServletAuthentication").getMethod("login",new Class[] { java.lang.String.class,java.lang.String.class,HttpServletRequest.class,HttpServletResponse.class });if (meth == null) {meth = Object.class.forName("weblogic.servlet.security.ServletAuthentication").getMethod("login",new Class[] { java.lang.String.class,java.lang.String.class,HttpServletRequest.class });if (meth != null) {result = meth.invoke(Object.class.forName("weblogic.servlet.security.ServletAuthentication"),new Object[] { v_userName, v_passWord,request });}} else {result = meth.invoke(Object.class.forName("weblogic.servlet.security.ServletAuthentication"),new Object[] { v_userName, v_passWord,request, response });}} catch (Exception e) {logger.info(e.getMessage(), e);meth = Object.class.forName("weblogic.servlet.security.ServletAuthentication").getMethod("login",new Class[] { java.lang.String.class,java.lang.String.class,HttpServletRequest.class });if (meth != null) {result = meth.invoke(Object.class.forName("weblogic.servlet.security.ServletAuthentication"),new Object[] { v_userName, v_passWord,request });}}} catch (Exception e) {logger.info(e.getMessage(), e);throw new ServletException(e.getMessage());}// 0:用户正常登陆 1:用户登陆失败if (result != null && result instanceof Integer) {if (((Integer) result).intValue() != 0) {logger.info(LOGIN_FAIL);throw new ServletException(LOGIN_FAIL);}} else if (result == null) {logger.info(LOGIN_FAIL);throw new ServletException(LOGIN_FAIL);}