actionutils.java

来自「是一个网站的博客系统」· Java 代码 · 共 38 行

package com.opensource.blog.web.action;

import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.*;


public class ActionUtils {

  public ActionUtils() {
  }

  public synchronized static void addErrors(HttpServletRequest request, ActionMessages errors) {
    if (errors == null) {
      //	bad programmer! *slap*
      return;
    }

    // get any existing errors from the request, or make a new one
    ActionMessages requestErrors = (ActionMessages) request.getAttribute(Globals.ERROR_KEY);
    if (requestErrors == null) {
      requestErrors = new ActionMessages();
    }
    // add incoming errors
    requestErrors.add(errors);

    // if still empty, just wipe it out from the request
    if (requestErrors.isEmpty()) {
      request.removeAttribute(Globals.ERROR_KEY);
      return;
    }

    // Save the errors
    request.setAttribute(Globals.ERROR_KEY, requestErrors);
  }

}