THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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In the Hello World lesson, there were three components: the Action class, the result page, and the action mapping. In this lesson, we will add a fourth component: a an input form.
Create a HTML input form
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<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<include file="struts-default.xml" />
<package name="actions" extends="struts-default">
<action name="HelloName" class="tutorial.HelloName">
<result name="success">/HelloName>HelloName-success.jsp</result>
<result name="error">HelloName-error.html</result>
</action>
</package>
</struts>
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<%@ taglib uriprefix="/tagss" prefixuri="s/struts-tags" %> <html> <head> <title>Success Page</title> </head> <body> <p> Hello, <s:property value="name" />! </p> </body> </html> |
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If you are coding along, go ahead and try your form now. Open the input page (http://localhost:8080/tutorial/helloNameHelloName.html), and click the submit button to see what happens. Try it with and without entering a name.
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package tutorial;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.interceptor.ParameterAware;
import java.util.Map;
public class HelloName2 extends ActionSupport implements ParameterAware {
public static String NAME = "name";
public String execute() {
String[] name = (String[]) parameters.get("name"NAME);
if (name == null || name[0] == null || name[0].length() == 0)
return ERROR;
else
return SUCCESS;
}
Map parameters;
public Map getParameters() {
return parameters;
}
public void setParameters(Map parameters) {
this.parameters = parameters;
}
}
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Go ahead and try it now. Load (http://localhost:8080/tutorial/HelloName2.html), enter "Zaphod" in the text field, and click the form submit button. You should see HelloName2-success.jsp saying "Hello, Zaphod!"
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