Tapestry 建立自己得 Validator

Tapestry 建立自己得 Validator

关键字: tapestry validator今天介绍一下如何建立自己得Validator1. 建立Validator继承BaseValidator类我实现得是验证用户输入必须和指定字段一致。如果想要带参数得验证，请添加一个带String参数得构造方法，并实现setter，getter方法例如validator验证调用名为 name，则实现setName,getName方法。代码：

package org.appfuse.webapp.tapestry;

import org.apache.tapestry.IMarkupWriter;import org.apache.tapestry.IRequestCycle;import org.apache.tapestry.TapestryUtils;import org.apache.tapestry.form.FormComponentContributorContext;import org.apache.tapestry.form.IFormComponent;import org.apache.tapestry.form.ValidationMessages;import org.apache.tapestry.form.validator.BaseValidator;import org.apache.tapestry.valid.ValidatorException;public class MyValidater extends BaseValidator {//用户得输入内容private String name;/*** @return the name*/public String getName() {return name;}/*** @param name* the name to set*/public void setName(String name) {this.name = name;}public MyValidater() {}public MyValidater(String string) {super(string);}//实现验证方法public void validate(IFormComponent field, ValidationMessages messages,Object object) throws ValidatorException {String str = object.toString();if (!str.equals(name))throw new ValidatorException(messages.formatValidationMessage(getMessage(), "invalid-format", new Object[] {field.getDisplayName(), null }));}}2.ok，修改hivemodule.xml 文件，添加以下代码<contribution configuration-id="tapestry.form.validator.Validators"><validator name="name" configurable="true" class="org.appfuse.webapp.tapestry.MyValidater"/></contribution>

注意：如果你的validator不带参数，请设置configurable=false3. ok,可以在page文件中使用了，

<component id="usernameField" type="TextField"><binding name="value" value="user.username"/><binding name="validators" value="validators:required,name=airdream"/><binding name="displayName" value="message:user.username"/></component>

大功告成！输入内容必须为aridream,否则报错！