struts2数据校验(重写validate方法)

小灰灰 2022-05-24 02:59 283阅读 0赞

【例】用户登录添加数据校验

第一步：创建loginAction

package com.dwx.action;
    import java.util.regex.Pattern;
    
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    public class loginAction extends ActionSupport {
    	private String username;
    	private String password;
    	@Override
    	public String execute() throws Exception {
    		if(username.equals("admin")){
    			if(password.equals("123456")){				
    				ActionContext.getContext().getSession().put("username",username);
    				return SUCCESS;
    			}else{
    				this.addFieldError("password", "密码错误！");
    				return INPUT;
    			}
    		}else{
    			this.addFieldError("username", "用户名错误！");
    			return INPUT;
    		}
    	}
    	@Override
    	public void validate() {
    		if(username==null||"".equals(username.trim())){
    			this.addFieldError("username", "用户名不能为空！");
    		}
    		if(!Pattern.compile("^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$").matcher(username.trim()).matches()){
    			this.addFieldError("username", "用户名长度必须在5-20之间，且以字母开头，可带数字、_和.的字符串！");
    		}
    		if(password==null||"".equals(password.trim())){
    			this.addFieldError("password", "密码不能为空！");
    		}
    		if(password.length()<6||password.length()>20){
    			this.addFieldError("username", "密码长度必须在6-20之间！");
    		}
    	}
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    }

第二步：配置struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    <struts>
    	<constant name="struts.custom.i18n.resources" value="message"/>
    	<constant name="struts.i18n.encoding" value="GBK"/>
    	<package name="user" extends="struts-default" namespace="/">
    		<action name="login" class="com.dwx.action.loginAction">
    			<result>/index.jsp</result>
    			<result name="input">/login.jsp</result>
    		</action>
    	</package>
    </struts>

第三步：创建login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%@ taglib prefix="s" uri="/struts-tags"%>
    <%
    	String path = request.getContextPath();
    	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
    			+ path + "/";
    %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    <base href="<%=basePath%>">
    <title>用户登录</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    
    <LINK href="css/admin.css" type="text/css" rel="stylesheet">
    </head>
    <body>
    	<TABLE height="100%" cellSpacing=0 cellPadding=0 width="100%"
    		bgColor=#002779 border=0>
    		<TR>
    			<TD align=middle>
    				<TABLE cellSpacing=0 cellPadding=0 width=468 border=0>
    					<TR>
    						<TD><IMG height=23 src="images/login_1.jpg" width=468></TD>
    					</TR>
    					<TR>
    						<TD><IMG height=147 src="images/login_2.jpg" width=468></TD>
    					</TR>
    				</TABLE>
    				<TABLE cellSpacing=0 cellPadding=0 width=468 bgColor=#ffffff
    					border=0>
    					<TR>
    						<TD width=16><IMG height=122 src="images/login_3.jpg"
    							width=16></TD>
    						<TD align=middle>
    							<TABLE cellSpacing=0 cellPadding=0 width=230 border=0>
    								<FORM action="login" method="post">
    									<TR height=5>
    										<TD width=5></TD>
    										<TD width=56></TD>
    										<TD></TD>
    									</TR>
    									<TR height=36>
    										<TD></TD>
    										<TD>用户名</TD>
    										<TD><INPUT
    											style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid"
    											maxLength=20 size=20 name="username"></TD>
    									</TR>
    									<TR height=36>
    										<TD> </TD>
    										<TD>密 码</TD>
    										<TD><INPUT
    											style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid"
    											type=password maxLength=20 size=20 name="password"></TD>
    									</TR>
    									<TR height=5>
    										<TD colSpan=3></TD>
    									</TR>
    									<TR>
    										<TD> </TD>
    										<TD> </TD>
    										<TD><INPUT type=image height=18 width=70
    											src="images/bt_login.gif"></TD>
    									</TR>
    								</FORM>
    							</TABLE>
    						</TD>
    						<TD width=16><IMG height=122 src="images/login_4.jpg"
    							width=16></TD>
    					</TR>
    				</TABLE>
    				<TABLE cellSpacing=0 cellPadding=0 width=468 border=0>
    					<TR>
    						<TD><IMG height=16 src="images/login_5.jpg" width=468></TD>
    					</TR>
    				</TABLE>
    				<table cellpadding="0" cellspacing="0" border="0">
    					<tr>
    						<td style="font-size: 12px;color: red;"><s:fielderror /></td>
    					</tr>
    				</table>
    			</TD>
    		</TR>
    	</TABLE>
    </body>
    </html>

效果：

![20180519091143389][]

[20180519091143389]: /images/20220524/ee15a5aee4654a51b78e51c9276c36e5.png