Display Error Message Struts 1.2
Struts 2.x Wicket Spring Hibernate JSF Action Errors in Struts with example code. How to display errors in JSP page? VK September 7, 2014 struts The below tutorial explains that how to use ActionErrors class in struts web applications and also covers how the errors generated by the validate() method of ActionForm, are displayed in the JSP page. ActionErrors is a class that extends org.apache.struts.action.ActionMessages class. It adds error(s) generated by the validate() method or any method which returns ActionError of an ActionForm. Errors (ActionError objects) are added to the ActionErrors instance using add method which has the following form. public void add(java.lang.String property, ActionError error) - this method is depreciated. You can use add(String, ActionMessage) instead. property - Property name (or ActionErrors.GLOBAL_ERROR) - to decide the validation errors are either global to the entire ActionForm bean they are associated with, or they are specific to a particular bean property . error - The error message to be added Each error is represented by an ActionError object, which contains a message key and up to four arguments as replacement values for substitution in the resulting message . ActionError has the following form. public ActionError(java.lang.String key, java.lang.Object value0, java.lang.Object value1, java.lang.Object value2, java.lang.Object value3) where key is Message key for this error message and value0 - 1st replacement value, value1 - 2nd replacement value , value2 - 3rd replacement value , value3 - 4th replacement value, where value0, value1 , value2 , value3 are optional. eg: mandatoryFields="Login Id and Password" new ActionError("fields.required", mandatoryFields) where fields.required is the message key and mandatoryFields is the message text (1st replacement value) used for substitution with {0} in the resulting error message, before it is displayed in the JSP. Message key, corresponding error messages and replacement parameters ( {0},{1}, {2} , {3} which are optional ) should be stored in a message properties file. In this example, ApplicationResources.properties is used as Message Resources file. It is located in a resources directory Or copy the file ApplicationResources.properties to \WEB-INF\classes\resources folder (or in the source JavaSource\resources) in the web application and add the line
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