Dynamic Method invocation is the concept in the Struts action mapping file, where instead of writing <action> for every method, one can map the wild character with the method name having same prefix or suffix.<\/p>\n
Example : Instead of writing addOperation, subOperation and divOperation, programmer can write *Operation.<\/p>\n
Consider below jsp code:<\/p>\n
\n<s:form action="calculator_add" >\n<s:textfield name="num1" label="Number 1"><\/s:textfield>\n<s:textfield name="num2" label="Number 2"><\/s:textfield>\n<s:submit action="calculator_add" value="Add" \/>\n<s:submit action="calculator_sub" value="Substract" \/>\n<\/s:form>\n<\/pre>\nStruts configuration:<\/p>\n
\n<package name="calc" extends="struts-default">\n\t\t<action name="calculatorInput">\n\t\t\t<result>\/pages\/calculator.jsp<\/result>\n\t\t<\/action>\n\n\t\t<action name="calculatorResult">\n\t\t\t<result>\/pages\/calculatorResult.jsp<\/result>\n\t\t<\/action>\n\n\t\t<action name="calculator_*" method="{1}"\n\t\t\tclass="com.G2.Actions.CalculatorAction">\n\t\t\t<result name="success" type="chain">calculatorResult<\/result>\n\t\t<\/action>\n\n\t<\/package>\n<\/pre>\nAs you can see, instead of writing different action, action name is provided like “calculator_*”\u009d, and method=”\u009d{1}”\u009d, means if the input is “calculator_add”\u009d then the add() method will be executed in Action class. That means we can invoke any methods dynamically other than execute() in action class.<\/p>\n","protected":false},"excerpt":{"rendered":"
Explain dynamic method invocation in Struts 2<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"jz_research_post":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[16],"tags":[335],"class_list":["post-1864","post","type-post","status-publish","format-standard","hentry","category-struts","tag-struts"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":1860,"url":"https:\/\/www.jitendrazaa.com\/blog\/java\/struts\/error-resolved-form-action-defaulting-to-action-attributes-literal-value\/","url_meta":{"origin":1864,"position":0},"title":"Error Resolved- Form action 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