Structs复习 简单数据校验

时间：2023-03-09 08:49:31
Structs复习 简单数据校验

jar包

Structs复习 简单数据校验

web.XML

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

  <filter>

        <filter-name>struts2</filter-name>

        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>struts2</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

</web-app>

structxml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

    <constant name="struts.devMode" value="true" />

    <package name="user" extends="struts-default" namespace="/user">

        <action name="user" class="com.bjsxt.struts2.user.action.UserAction">

            <result>/user_add_success.jsp</result>

            <result name="error">/user_add_error.jsp</result>

        </action>

    </package>

</struts>

　

UserAction.java

package com.bjsxt.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");     //key 和value

            return ERROR;

        }

        return SUCCESS;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

}

index.JSP

<?xml version="1.0" encoding="GB18030" ?>

<%@ page language="java" contentType="text/html; charset=GB18030"

    pageEncoding="GB18030"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=GB18030" />

<base href="<%=basePath %>"/>

<title>Insert title here</title>

</head>

<body>

使用addFieldError方法和s:fieldError标签简单处理数据校验

<a href="user/user!add?name=a" >添加用户</a>

</body>

</html>

user_add_error.jsp

<?xml version="1.0" encoding="GB18030" ?>

<%@ page language="java" contentType="text/html; charset=GB18030"

    pageEncoding="GB18030"%>

<%@taglib uri="/struts-tags" prefix="s" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=GB18030" />

<title>Insert title here</title>

</head>

<body>

    User Add Error!

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

    <br />

    <s:property value="errors.name[0]"/>

    <s:debug></s:debug>

</body>

</html>
 <s:fielderror fieldName="name" theme="simple"/> 显示出来会是li1的格式 不常用
用s：property显示出来的是字符串 有利于后面的处理

user_add_success.jsp

<?xml version="1.0" encoding="GB18030" ?>

<%@ page language="java" contentType="text/html; charset=GB18030"

    pageEncoding="GB18030"%>

    <%@taglib uri="/struts-tags" prefix="s" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=GB18030" />

<title>Insert title here</title>

</head>

<body>

    User Add Success!

</body>

</html>

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