I just checked the official document (convention-plugin.html) and learned the Convention plug-in of struts2. The article serves as only one note. I suggest you go to the official document for clarity and comprehensiveness.
You need to add these packages in the project
Convention first looks for the package. If the package contains the word action, the package is used as the root path, that is, namespace = "/"
Then find the class. If the class name of a class is the end of action or inherits the actionsupport class, the class will be used as the action class, and the corresponding URL is
For example:
Com. example. Actions. mainaction->/main
Com. example. Actions. Products. display->/products/display
Com. example. Struts. Company. Details. showcompanydetailsaction->/Company/details/show-company-Details
JSP files to be placed under the/WEB-INF/content/folder
/WEB-INF/content/Main. jsp
/WEB-INF/content/display. jsp
/WEB-INF/content/Company/details/show-company-details.jsp
The following is an example:
Struts. xml:
<? XML version = "1.0" encoding = "UTF-8"?> <! Doctype struts public "-// Apache Software Foundation // DTD struts configuration 2.3 // en" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name = "struts. i18n. encoding "value =" UTF-8 "/> <! -- When the struts configuration file is modified, whether the system automatically reloads the file. The default value is false (used in the production environment). It is best to open the file during development --> <constant name = "struts. configuration. XML. reload "value =" true "/> <! -- Used in development mode to print more detailed error information --> <constant name = "struts. devmode" value = "true"/> </struts>
Web. xml
<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Struts Blank</display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list></web-app>
The package structure is as follows:
Helloworld. Java
package com.hyy.action;import com.opensymphony.xwork2.ActionSupport;public class HelloWorld extends ActionSupport{ private String message; public String execute() { message = "hyy"; return SUCCESS; } public String getMessage() { return message; }}
/WEB-INF/content/hello-world.jsp
<% @ Page Language = "Java" contenttype = "text/html; charset = UTF-8" pageencoding = "UTF-8" %> <! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en" "http://www.w3.org/TR/html4/loose.dtd"> <HTML>Enter http: // localhost: 8080/project name/Hello-world in the address bar.
The action helloworld. Java, the returned view is the hello-world.jsp
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