redirect如何让url忽略model

本文翻译自http://stackoverflow.com/questions/2163517/how-do-i-prevent-spring-3-0-mvc-modelattribute-variables-from-appearing-in-url

?

三种方式：拦截器、viewresolver、redirect前model.asMap().clear()清除modelmap

?

1.拦截器中处理

?

     public class CommonModelMapInformationInterceptor implements    HandlerInterceptor {    // This method is unused as this Interceptor is for post handle only    public void afterCompletion(HttpServletRequest request,    HttpServletResponse response, Object handler, Exception ex)    throws Exception { }    // This method is unused as this Interceptor is for post handle only    public boolean preHandle(HttpServletRequest request,    HttpServletResponse response, Object handler) throws Exception {    return true;    }    public void postHandle(HttpServletRequest request,    HttpServletResponse response, Object handler,    ModelAndView modelAndView) throws Exception {    boolean isRedirectView = modelAndView.getView() instanceof RedirectView;    boolean isViewObject = modelAndView.getView() == null;    // if the view name is null then set a default value of true    boolean viewNameStartsWithRedirect = (modelAndView.getViewName() == null ? true : modelAndView.getViewName().startsWith(UrlBasedViewResolver.REDIRECT_URL_PREFIX));    if(modelAndView.hasView() && (    ( isViewObject && !isRedirectView) ||    (!isViewObject && !viewNameStartsWithRedirect))){    addCommonModelData(modelAndView);    }    }    public void addCommonModelData(ModelAndView modelAndView){    modelAndView.addObject(“stuff”, “importantStuff”);    modelAndView.addObject(“moreStuff”, “moreImportantStuff”);    }    }

?

?

2.viewresolver中处理

? ?我自己用的是继承自InternalResourceViewResolver,

? ?分别介绍两种方式：

? ?1）可以在需要忽略model的时候改用 redirectWithoutModel来做跳转

public class RedirectViewResolver implements ViewResolver, Ordered {    // Have a highest priority by default    private int order = Integer.MIN_VALUE;     // Uses this prefix to avoid interference with the default behaviour    public static final String REDIRECT_URL_PREFIX = "redirectWithoutModel:";         public View resolveViewName(String viewName, Locale arg1) throws Exception {        if (viewName.startsWith(REDIRECT_URL_PREFIX)) {            String redirectUrl = viewName.substring(REDIRECT_URL_PREFIX.length());            return new RedirectView(redirectUrl, true, true, false);        }        //return null;//此处原文返回空        return super.resolveViewName(viewName, arg1);    }    public int getOrder() {        return order;    }    public void setOrder(int order) {        this.order = order;    }}

? ?2）当整个应用都不希望带model跳转，可以更简单的实现

??

public class RedirectsNotExposingModelUrlBasedViewResolver extends UrlBasedViewResolver {    @Override    protected View createView(String viewName, Locale locale) throws Exception {        View view = super.createView(viewName, locale);        if (view instanceof RedirectView) {            ((RedirectView) view).setExposeModelAttributes(false);        }        return view;    }}

?