The file cannot be validated as the XML definition 异常解决办法

最新推荐文章于 2021-05-09 16:06:36 发布

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本文介绍Struts2中配置验证框架的常见错误及其解决方法。通过实例展示如何定义验证规则，包括必填检查、字符串长度限制及字段表达式验证等。

在struts2中配置验证框架时，回报上面的错误。这时候，要学会读懂英文意思。文件不能被验证的XML定义。下面看完整的错误提示。

The file cannot be validated as the XML definition "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd" that is specified as describing the syntax 
 of the file cannot be located.

马上到xwork核心文件中找xwork-validator-1.0.2.dtd的文件的约定规则和自己写的意义对应。

<validators>
    <field name="user.name">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>用户名不能为空</message>      
        </field-validator>

        <field-validator type="stringlength">
            <param name="maxLength">10</param>
            <param name="minLength">6</param>
            <message>用户名长度必须在${minLength}和${maxLength}之间</message>       
        </field-validator>  
    </field>
 </validators>

 <validators>
    <field name="user.pwd">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>密码不能为空</message>       
        </field-validator>

        <field-validator type="stringlength">
            <param name="minLength">6</param>
            <message>长度必须大于${minLength}</message>      
        </field-validator>  
    </field>

    <field name="repwd">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>确认密码不能为空</message>     
        </field-validator>

        <field-validator type="fieldexpression">
            <param name="expression">user.pwd==repwd</param>
            <message>密码和确认密码必须相等</message>      
        </field-validator>  
    </field>
 </validators>

对比发现是根节点，我多写了。只保留一个就好了。
完整jsp页面代码：

<s:fielderror/>
 <s:form action="reg" method="post">
    <s:textfield name="user.name" label="用户名" />
    <s:password name="user.pwd" label="密码" />
    <s:password name="repwd" label="确认密码" />
    <s:textfield name="user.telephone" label="电话" />
    <s:textfield name="user.username" label="用户姓名" />
    <s:submit value="立即注册" />
 </s:form>

配置文件，配置文件要用请求文件放在一起。命名要注意，如果action命名：RegisterAction，配置文件为：RegisterAction-validation.xml

<?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" >

 <validators>
    <field name="user.name">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>用户名不能为空</message>      
        </field-validator>

        <field-validator type="stringlength">
            <param name="maxLength">10</param>
            <param name="minLength">6</param>
            <message>用户名长度必须在${minLength}和${maxLength}之间</message>       
        </field-validator>  
    </field>

    <field name="user.pwd">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>密码不能为空</message>       
        </field-validator>

        <field-validator type="stringlength">
            <param name="minLength">6</param>
            <message>长度必须大于${minLength}</message>      
        </field-validator>  
    </field>

    <field name="repwd">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>确认密码不能为空</message>     
        </field-validator>

        <field-validator type="fieldexpression">
            <param name="expression">user.pwd==repwd</param>
            <message>密码和确认密码必须相等</message>      
        </field-validator>  
    </field>

    <field name="user.telephone">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>电话号码不能为空</message>     
        </field-validator>

        <field-validator type="regex">
            <param name=" regex ">^(\d{3,4}-){0,1}(\d{7,8}))$</param>          
            <message>电话格式不正确</message>      
        </field-validator>  
    </field>

    <field name="user.username">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>用户姓名不能为空</message>     
        </field-validator>

        <field-validator type="stringlength">
            <param name="maxLength">10</param>
            <param name="minLength">2</param>
            <message>用户名长度必须在${minLength}和${maxLength}之间</message>       
        </field-validator>  
    </field>
 </validators>

acrion

package actions;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

import com.opensymphony.xwork2.ActionSupport;

import entity.User;

public class RegisterAction extends ActionSupport {


        private User user;

        private String repwd;



    public User getUser() {
            return user;
        }

        public void setUser(User user) {
            this.user = user;
        }

        public String getRepwd() {
            return repwd;
        }

        public void setRepwd(String repwd) {
            this.repwd = repwd;
        }


    public String execute(){
        return SUCCESS;

    }   
}