struts2-action-validate()验证

package com.test.action;
import java.util.Date;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {
	private int age ;

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public String execute() throws Exception{
		System.out.println("execute()") ;
		return SUCCESS ;
	}

	public void validate() {
		
		System.out.println("hello world") ;
	}
	
}

 先调用set()方法，然后调用validate()方法，没用错误就调用execute()方法，否则不调用！