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Struts的Validator验证框架使用教程

程序员文章站 2022-07-12 11:30:53
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一、验证有很多种:

1.最开始接触的js验证客户端验证

2.服务器端验证

2.1.在FormBean中验证(本例中采用的便是FormBean中使用Validator验证格式)

2.2.Action业务逻辑层验证(比如用户名在数据库中是否存在等等)

3.采用Ajax在异步的情况下进行客户端和服务器同时的验证

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二、步骤:

1.建立web项目struts_validator添加struts(1.2)支持

2.右击项目-->new-->other-->myeclipse-->web-struts-->struts1.2-->Strurs1.2 Form ,Action & JSP;supclass:ValidatorForm;再添加一些属性,跳转些...

3.打开validator-rules.xml将一下代码添加到struts-config.xml中

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,
/WEB-INF/validation.xml"/>
</plug-in>

4.打开validator-rules.xml将一下代码添加到ApplicationResources.properties中,当然你可以根据需要修改资源文件


# Struts Validator Error Messages
errors.required={0} is required.
errors.minlength={0} can not be less than {1} characters.
errors.maxlength={0} can not be greater than {1} characters.
errors.invalid={0} is invalid.

errors.byte={0} must be a byte.
errors.short={0} must be a short.
errors.integer={0} must be an integer.
errors.long={0} must be a long.
errors.float={0} must be a float.
errors.double={0} must be a double.

errors.date={0} is not a date.
errors.range={0} is not in the range {1} through {2}.
errors.creditcard={0} is an invalid credit card number.
errors.email={0} is an invalid e-mail address.


5.编写public class RegistForm extends ValidatorForm的validate方法

public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
//必须要继承自父类的
ActionErrors errors = super.validate(mapping, request);

// Only need crossfield validations here
if (!password.equals(password2)) {
errors.add("password2", new ActionMessage("error.password.match"));
}
return errors;
}

6.在WEB-INF目录下编写validation.xml文件

<!DOCTYPE form-validation PUBLIC
"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN"
"http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd">
<form-validation>
<formset>
<!--
如果FormBean继承的是ValidatorForm那么<form name="registForm">的name
属性值和<action/>中name的属性值是一样的 如果FormBean继承的是ValidatorActionForm那么<form
name="registForm">的name 属性值和<action/>中path的属性值是一样的
-->
<form name="registForm">
<field property="username" depends="required,minlength">
<!--
如果arg不指定name,那么depends的将共享 resource="false"那么在<html:errors
property="username" /> 中显示的将是我们key定义的数据
resource="true"(默认的)那么将使用资源文件中的key-value配置
具体的属性信息可以参看http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd
-->
<arg0 key="username" resource="false" />
<arg1 name="minlength" key="${var:minlength}" resource="false" />
<var>
<var-name>minlength</var-name>
<var-value>6</var-value>
</var>
</field>
<field property="password" depends="required,minlength">
<arg0 key="password" resource="false" />
<arg1 name="minlength" key="${var:minlength}" resource="false" />
<var>
<var-name>minlength</var-name>
<var-value>6</var-value>
</var>
</field>
<field property="password2" depends="required"></field>
<field property="email" depends="email">
<arg0 key="customer.email" resource="false" />
<arg1 name="email" key="[email protected]" resource="false" />
</field>
</form>
</formset>
</form-validation>


7.部署运行:http://localhost:8080/struts_validator_3/regist.jsp

8.查看附件


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