Struts1.2中的validation验证框架的实现步骤（转帖）

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框架 Struts Java XML Apache

步骤：

1 环境配置：首先要为struts加入Validator支持
lib包：加入validator所需的jar包
配置文件：struts-config.xml里加入

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

这里所需的validator-rules.xml和validation.xml也需要放到/WEB-INF/下

2 配置actionForm
2.1 修改Form基类：将actionForm继承的基类改为ValidatorForm
2.2 配置struts-config.xml文件：把要验证的form的validator属性设为true

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
  <form-beans>
    <form-bean name="userForm" type="com.satesoft.test.UserForm" />
  </form-beans>
  <action-mappings>
    <action input="/index.jsp" name="userForm" path="/show" scope="request" type="com.satesoft.test.ShowAction" validate="true">
      <forward name="forward" path="/show.jsp" />
    </action>
  </action-mappings>
  <message-resources parameter="ApplicationResources" />
  <plug-in className="org.apache.struts.validator.ValidatorPlugIn">
    <set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml" />
  </plug-in>
</struts-config>

注意：一定要配置对应的Action里的input属性，否则struts找不到要返回的路径

2.3 配置validator.xml文件：在validation.xml里加入对要验证的actionform的定义


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0//EN" "http://jakarta.apache.org/commons/dtds/validator_1_0.dtd">
<form-validation>
  <formset>
    <form name="userForm">
      <field property="name" depends="required">
        <arg0 key="user.name.required"/>
      </field>
    </form>
  </formset>
</form-validation>

这里同时要配置的还有消息资源。在资源文件中加入上述配置文件中所需的消息

errors.header=<H3><font color="blue">errors</font><br>
errors.footer=<p></p>
errors.required={0} is required.
errors.minlength={0} cannot be less than {1} characters.
errors.maxlength={0} cannot 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 not a valid credit card number.
errors.email={0} is an invalid email address
user.name.required=user name

2.4 配置作为input的jsp页面：

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html>
<head>
<title>
index
</title>
</head>
<body bgcolor="#ffffff">
<html:form action="show.do" method="post">
  <html:text property="name"/>
  <html:submit title="确定"/>
  <html:cancel title="取消">
  </html:cancel>
</html:form>
<html:errors/>

</body>
</html>

如果需要加入javascript支持，则：

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html>
<head>
<title>
index
</title>
</head>
<body bgcolor="#ffffff">
<html:form action="show.do" method="post" onsubmit="return validateUserForm(this);">
  <html:text property="name"/>
  <html:submit title="确定"/>
  <html:cancel title="取消">
  </html:cancel>
</html:form>
<html:javascript formName="userForm"/>
</body>
</html>

注意：onsubmit里的validatorUserForm要和下面的formName里的名字一致，只不过首字母大写

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