Struts2校验器实现注册校验

朱雀 2022-05-25 10:08 243阅读 0赞

# 一、场景 #

*  用户名不能为空，长度为6-14位（第一位为大写字母，后面每一位为字母、数字、下划线）    ，用户名不能为admin、
 *  密码不能为空，密码长度为8-10位；
 *  密码和确认密码一致

#  #

# 二、实现 #

User

public class User {
    
        private String name;
        private String pass;
        private String repass;
    
       //省略get set

RegisterAction6

import com.opensymphony.xwork2.ActionSupport;
    
    public class RegisterAction6 extends ActionSupport {
    
      private User user;
    
        public User getUser() {
            return user;
        }
    
        public void setUser(User user) {
            this.user = user;
        }
    
        public String rej(){
            System.out.println("进入注册方法");
            return "success";
        }
    }

RegisterAction6-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
            "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
    
    <validators>
        <field name="user.name">
            <field-validator type="requiredstring" short-circuit="true">
                <param name="trim">true</param>
                <message>用户名不为空</message>
            </field-validator>
            <field-validator type="stringlength" short-circuit="true">
                <param name="minLength">6</param>
                <param name="maxLength">14</param>
                <message>用户名长度为6-14位</message>
            </field-validator>
            <field-validator type="regex" short-circuit="true">
                <param name="regexExpression"><![CDATA[([A-Z]\w*)]]></param>
                <message>用户名第一位为大写字母，后面每一位为字母、数字、下划线</message>
            </field-validator>
            <field-validator type="fieldexpression" short-circuit="true">
                <param name="expression"><![CDATA[(user.name != "admin")]]></param>
                <message>用户名不能为admin</message>
            </field-validator>
        </field>
        <field name="user.pass" >
            <field-validator type="required" short-circuit="true">
                <message>密码不能为空</message>
            </field-validator>
            <field-validator type="stringlength" short-circuit="true">
                <param name="minLength">8</param>
                <param name="maxLength">10</param>
                <message>密码长度为8-10位</message>
            </field-validator>
        </field>
        <field name="user.repass">
            <field-validator type="fieldexpression" short-circuit="true">
                <param name="expression"><![CDATA[(user.pass == user.repass)]]></param>
                <message>密码和确认密码一致</message>
            </field-validator>
        </field>
    </validators>

sixstruts.xml

<?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.i18n.encoding" value="UTF-8" />
        <package name="user6" extends="struts-default">
            <action name="rej6" class="six.RegisterAction6" method="rej">
                <result name="success">/6/show6.jsp</result>
                <result name="input">/6/register6.jsp</result>
            </action>
        </package>
    </struts>

register6.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@taglib prefix="s" uri="/struts-tags" %>
    <html>
    <head>
        <title>注册页面</title>
    </head>
    <body>
    <form action="rej6">
        <h2>注册</h2>
        用户名:<input type="text" name="user.name"/>
        <h2 style="color: red"><s:fielderror fieldName="user.name"></s:fielderror></h2>
        密码:<input type="password" name="user.pass"/>
        <h2 style="color: red"><s:fielderror fieldName="user.pass"></s:fielderror></h2>
        重复密码:<input type="password" name="user.repass"/>
        <h2 style="color: red"><s:fielderror fieldName="user.repass"></s:fielderror></h2>
        <input type="submit" value="提交" />
    </form>
    </body>
    </html>

# 三、运行 #

![2018051217145458][]

![20180512171525754][]

# 四：问题与解决 #

**①：加入验证器后无法请求（连接失败）：**

**校验器头文件出错：**

<?xml version="1.0" encoding="UTF-8"?>   
<!DOCTYPE validators PUBLIC   
  "-//OpenSymphony Group//XWork Validator 1.0.2//EN"   
  "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

**改为：**

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"  
        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">

** **

**②：第一位为大写字母，后面每一位为字母、数字、下划线（正则）**

\[A-Z\]\\w\*

** **

**③：短路功能：**

short-circuit="true"

[2018051217145458]: /images/20220525/c74d3a1d76a542ef93e5ab44b8f389bb.png
[20180512171525754]: /images/20220525/460b4eb9f976479ab22d4beeb3d79cb4.png