简单属性验证

package com.zchen.struts2.user.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
	private String name;
	
	public String add() {
		if(name == null || !name.equals("admin")) {
			this.addFieldError("name", "name is error");
			this.addFieldError("name", "name is too long");
			return ERROR;
		} 
		return SUCCESS;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
	
}

 

打印出这个错误信息：

1.<s:fielderror fieldName="name" theme="simple"/>

 

当调用this.addFieldError("name", "name is error");会把错误信息加入到栈中<s:debug></s:debug>可以看到。

 

2.<s:property value="errors.name[0]"/>也可以打印出来。