springmvc 应用二

 自定义 HostUserArgumentResolver 针对上一节springmvc-servlet.xml中提到的hostUserArgumentResolver

import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebArgumentResolver;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.RequestAttributes;

import com.cqa.cms.entity.CmsUser;

public class HostUserArgumentResolver implements WebArgumentResolver {

    /*
     * (non-Javadoc)
     *
     * @see
     * org.springframework.web.bind.support.WebArgumentResolver#resolveArgument
     * (org.springframework.core.MethodParameter,
     * org.springframework.web.context.request.NativeWebRequest)
     */
    @Override
    public Object resolveArgument(MethodParameter arg0, NativeWebRequest arg1)
	    throws Exception {
	if (arg0.getParameterType().equals(CmsUser.class)) {
		CmsUser member = (CmsUser) arg1.getAttribute("host",
		    RequestAttributes.SCOPE_SESSION);
	    if (member != null) {
		return member;
	    } else {
		return UNRESOLVED;
	    }
	}

	return UNRESOLVED;
    }

}

 

自定义异常 针对上一节springmvc-servlet.xml中提到的exceptionResolver

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

import com.cqa.platform.util.RequestTypeUtils;

public class TestExceptionResolver extends SimpleMappingExceptionResolver {

	public ModelAndView resolveException(HttpServletRequest request,
			HttpServletResponse response, Object handler, Exception ex) {
		if (RequestTypeUtils.isJsonRequest(request)) {
			ModelAndView ret = new ModelAndView("jsonView");
			if (ex instanceof MaxUploadSizeExceededException) {
				ret.addObject("type", "maxupload");
			}
			ret.addObject("error", ex.getMessage());
			return ret;
		} else {
			return super.resolveException(request, response, handler, ex);
		}

	}

}