Struts 2 validation using annotation
Question
I am exploring annotation in Struts 2. The simple validation that am trying using @RequiredFieldValidator is not happening, the form submits empty fields. I could not figure it out, can someone help me.
My JSP page:
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
</head>
<body>
<h2>Struts 2 - Login Application</h2>
<s:actionerror />
<s:fielderror />
<s:form action="login" method="post" namespace="/" >
<s:textfield name="username" key="label.username" size="20" />
<s:password name="password" key="label.password" size="20" />
<s:submit />
</s:form>
</body>
</html>
My action class:
@Namespace("/")
@Results({
@Result(name="success", location="/Welcome.jsp"),
@Result(name="error", location="/Login.jsp")
})
public class LoginAction extends ActionSupport implements ValidationAware {
/**
*
*/
private static final long serialVersionUID = 5271055255991498361L;
private String username;
private String password;
public String execute() {
if (this.username.equals("admin")
&& this.password.equals("admin123")) {
return "success";
} else {
return "error";
}
}
@RequiredFieldValidator( message = "The name is required" )
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@RequiredFieldValidator( message = "The password is required" )
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
1 answers
solution1
1 ACCPTED 2013-07-22 10:20:33
You should place the validator annotations on setter like this
@RequiredStringValidator(type= ValidatorType.FIELD, message = "The name is required.")
public void setUsername(String username) {
this.username = username;
}
RequiredFieldValidator checks the null values but string field are not null if they are empty, use RequiredStringValidator . Also you should run the validation interceptor on the action.
Also, I think you should read carefully a type conversion used by the framework.
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