@RequiredFieldValidator and @StringLengthFieldValidator in Struts 2
June 15, 2014
@RequiredFieldValidator Annotation in Struts 2
@RequiredFieldValidator checks for a field that user has entered a value or not. If no value is filled, an error message will be displayed.message : This attribute is required. This displays the error message.
key : This is I18 key which is obtained from property file.
type : The value of type can be like ValidatorType.FIELD enum.
Syntax
@RequiredFieldValidator(message = "Default message", key = "msg.i18n.key", shortCircuit = true)
public class UserAction extends ActionSupport{
private String name;
public String execute() {
return SUCCESS;
}
@RequiredFieldValidator(message = "Please enter a value.")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
@StringLengthFieldValidator Annotation in Struts 2
@StringLengthFieldValidator checks the length of string in the form field. It assumes every thing string and gets length and checks if it is in given length range. If min and max is not set, it will do nothing.message : This attribute is required. This displays the error message.
key : This is I18 key which is obtained from property file.
type : The value of type can be like ValidatorType.FIELD enum.
min : Minimum value of integer entered by user.
max: Maximum value of integer entered by user.
trim: This is a Boolean property and if true, String is trimmed before getting length.
Syntax
@StringLengthFieldValidator(message = "Default message", key = "msg.i18n.key", shortCircuit = true, trim = true, minLength = "15", maxLength = "30")
public class UserAction extends ActionSupport{
private String name;
public String execute() {
return SUCCESS;
}
@StringLengthFieldValidator(message = "Enter value between 15 and 30", trim = true, minLength = "15", maxLength = "30")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
