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;}}

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打印出这个错误信息：

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

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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。

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

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