Struts2之校验

1.输入校验

错误提示页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<s:if test="fieldErrors!=null">
<s:property value="fieldErrors['msg'][0]"/>
</s:if>
<s:debug></s:debug>
</body>
</html>

Action类

public class ValidateAction extends ActionSupport {

    
    private String age;
    
    public String getAge() {
        return age;
    }


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


    public String execute() {
        
        
        System.out.println("execute()方法");
        
        
        return SUCCESS;
        
    }
    
    @Override
    public void validate() {
            
        System.out.println("validate()方法");
        
        //判断是否为数值型
        boolean isNum = age.matches("[0-9]+");
        
        if(Integer.parseInt(age)<=18||Integer.parseInt(age)>=60) {
            
            this.addFieldError("msg", "年龄必须是18-60之间！");
        }else {
            this.addFieldError("msg", "您输入的用户名不合法！");
        }
        
    }

}

struts.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<constant name="struts.devMode" value="true"></constant>
<package name="jiangwenwen" namespace="/" extends="struts-default">
    <action name="validate" class="cn.jiangwenwen.action.ValidateAction">
        <result>/index.jsp</result> 
        <result name="input">/index.jsp</result>
    </action>
</package>
</struts>

1.输入校验

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