Struts2 簡單數據驗證

Struts2 簡單數據驗證

1、struts.xml

<struts>
 <constant name="struts.devMode" value="false"> 
 <constant name="struts.enable.DynamicMethodInvocation" value="true">
 <constant name="struts.i18n.encoding" value="utf-8"></constant>
 <package name="user" extends="struts-default">                 
        <action name="user" class="com.wxh.action.UserAction">
            <result>/useraddsuccess.jsp</result>
            <result name="error">/addError.jsp</result>
        </action>         
  </package>   
</constant></constant></struts>

package com.wxh.action;
 
import com.opensymphony.xwork2.ActionSupport;

public  class UserAction extends ActionSupport{

private static final long serialVersionUID = 1L; 
		
	private String name;
	public String add(){

//邏輯判斷
		if(name==null || !name.equals("admin")){
			this.addFieldError("name", "name is error");
			this.addFieldError("name", "name is too long");
			return ERROR;//返回到result的name為“ERROR”所指定的jsp頁面。
		}
		return SUCCESS;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}	
}

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