java addobject_springMVC后台的值无法通过ModelAndView的addObject传到前台的解决方法

按照标准用法的话应该是没问题

内部其实把model 通过request.setAttribute(modelName, modelValue); 放入的

protected void exposeModelAsRequestAttributes(Map model, HttpServletRequest request) throws Exception {

for (Map.Entry entry : model.entrySet()) {

String modelName = entry.getKey();

Object modelValue = entry.getValue();

if (modelValue != null) {

request.setAttribute(modelName, modelValue);

if (logger.isDebugEnabled()) {

logger.debug("Added model object '" + modelName + "' of type [" + modelValue.getClass().getName() +

"] to request in view with name '" + getBeanName() + "'");

}

}

else {

request.removeAttribute(modelName);

if (logger.isDebugEnabled()) {

logger.debug("Removed model object '" + modelName +

"' from request in view with name '" + getBeanName() + "'");

}

}

}

}

一个可能是你实现了HandlerInterceptor并实现了：

void postHandle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, java.lang.Object o, org.springframework.web.servlet.ModelAndView modelAndView) throws java.lang.Exception;

在此处修改了modelAndView

posted on 2012-12-17 15:41 墙头草 阅读(7907) 评论(2)  编辑  收藏