struts2验证框架

1. struts2验证框架

Struts2基于Struts2拦截器，为开发者提供了一套易用的验证框架，并可扩展；一般的验证都支持；

新建项目HeadFirstStruts2Chap07

2. struts2内置验证

2.1 普通字段验证；
2.2 验证表达式；
<s:actionerror/>

User.java

package com.andrew.model;
public class User {
    private String userName;
    private String name;
    private int age;
    private String email;
    private String homePage;
    @Override
    public String toString() {
        return "User [userName=" + userName + ", name=" + name + ", age=" + age
                + ", email=" + email + ", homePage=" + homePage + "]";
    }
    // getter and setter
}

RegisterAction.java

package com.andrew.action;
import com.andrew.model.User;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {
    private User user;
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    @Override
    public String execute() throws Exception {
        System.out.println("传入的用户："+user);
        return SUCCESS;
    }
}

RegisterAction-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
    <field name="user.userName">
        <field-validator type="requiredstring">
            <message>请输入用户名</message>
        </field-validator>
         <field-validator type="stringlength">
             <param name="minLength">6</param>
             <param name="maxLength">10</param>
            <message>用户名必须在${minLength}和${maxLength}之间</message>
        </field-validator>
    </field>
    <field name="user.name">
        <field-validator type="requiredstring">
            <message>请输入姓名</message>
        </field-validator>
    </field>
    <field name="user.age">
        <field-validator type="int">
            <param name="min">18</param>
            <message>年龄必须满18周岁</message>
        </field-validator>
    </field>
    <field name="user.email">
        <field-validator type="requiredstring">
            <message>请输入邮件</message>
        </field-validator>
        <field-validator type="email">
            <message>邮件格式不对</message>
        </field-validator>
    </field>
    <field name="user.homePage">
        <field-validator type="requiredstring">
            <message>请输入主页</message>
        </field-validator>
        <field-validator type="url">
            <message>主页格式不对</message>
        </field-validator>
    </field>
    <validator type="expression">
        <param name="expression"><![CDATA[!user.name.equals(user.userName)]]></param>
        <message>用户名和真实姓名不能相同</message>
    </validator>
</validators>

struts.xml

<package name="manager" extends="struts-default">
    <action name="registerAction" class="com.andrew.action.RegisterAction">
        <result name="input">/register.jsp</result>
        <result name="success">/success.jsp</result>
    </action>
</package>

register.jsp

<%@taglib prefix="s" uri="/struts-tags" %>
<s:actionerror/>
用户注册
<s:form action="/registerAction" method="post">
    <s:textfield name="user.userName" label="用户名"></s:textfield>
    <s:textfield name="user.name" label="真实姓名"></s:textfield>
    <s:textfield name="user.age" label="年龄"></s:textfield>
    <s:textfield name="user.email" label="邮件"></s:textfield>
    <s:textfield name="user.homePage" label="主页"></s:textfield>
    <s:submit value="注册"></s:submit>
</s:form>

success.jsp

注册成功

http://localhost:8080/HeadFirstStruts2Chap07/register.jsp

3. 自定义验证

ValidationAction.java

package com.andrew.action;
import com.opensymphony.xwork2.ActionSupport;
public class ValidationAction extends ActionSupport {
    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String execute() throws Exception {
        System.out.println("姓名："+name);
        return SUCCESS;
    }
}

ValidationAction-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
    <field name="name">
        <field-validator type="requiredstring">
            <message>请输入姓名</message>
        </field-validator>
        <field-validator type="sensitive">
            <message>有敏感词汇</message>
        </field-validator>
    </field>
</validators>

SensitiveWordValidators.java

package com.andrew.validators;
import com.opensymphony.xwork2.validator.ValidationException;
import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;
public class SensitiveWordValidators extends FieldValidatorSupport {
    public void validate(Object object) throws ValidationException {
        String fieldName = this.getFieldName();
        String value = this.getFieldValue(fieldName, object).toString();
        if (!check(value)) {
            this.addFieldError(fieldName, object);
        }
    }
    public boolean check(String value) {
        String sensitiveWords[] = { "你", "大爷" };
        for (int i = 0; i < sensitiveWords.length; i++) {
            if (value.indexOf(sensitiveWords[i]) > -1) {
                return false;
            }
        }
        return true;
    }
}

validators.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
        "-//Apache Struts//XWork Validator Config 1.0//EN"
        "http://struts.apache.org/dtds/xwork-validator-config-1.0.dtd">
<validators>
    <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
    <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
    <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
    <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
    <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
    <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
    <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
    <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
    <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
    <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
    <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
    <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
    <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
    <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>
    
    <validator name="sensitive" class="com.andrew.validators.SensitiveWordValidators"/>
</validators>

struts.xml

<package name="manager" extends="struts-default">
    <action name="validationAction" class="com.andrew.action.ValidationAction">
        <result name="input">/validation.jsp</result>
        <result name="success">/success.jsp</result>
    </action>
</package>

validation.jsp

<%@taglib prefix="s" uri="/struts-tags" %>
简单自定义验证
<s:form action="/validationAction" method="post">
    <s:textfield name="name" label="姓名"></s:textfield>
    <s:submit value="提交"></s:submit>
</s:form>

success.jsp

注册成功

http://localhost:8080/HeadFirstStruts2Chap07/validation.jsp