JavaWeb -- Struts1 动态bean, 动态校验， 动态生成javascript 表单校验
1. 动态formbean.
表单 JSP：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP '1.jsp' starting page</title>
</head>
<body>
<html:errors/> <!--错误回显-->
<html:javascript formName="UserFormBean"/> <!--动态生成javascript前端校验, onsubmit方法格式为 validate + formName (this)-->
<html:form action="/register" onsubmit="return validateUserFormBean(this)">
用户名：<input type="text" name="username"><br/>
密码：<input type="password" name="password"><br/>
确认密码：<input type="password" name="password2"><br/>
电子邮箱：<input type="text" name="email"><br/>
生日：<input type="text" name="birthday"><br/>
<input type="submit" value="注册">
</html:form>
</body>
</html>
struts-config.xml,配置动态formbean 和 校验需要的配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
"http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
<!--动态bean-->
<form-beans>
<form-bean name="UserFormBean" type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="username" type="java.lang.String"></form-property>
<form-property name="password" type="java.lang.String"></form-property>
<form-property name="password2" type="java.lang.String"></form-property>
<form-property name="email" type="java.lang.String"></form-property>
<form-property name="birthday" type="java.lang.String"></form-property>
</form-bean>
</form-beans>
<action-mappings>
<action path="/register"
name="UserFormBean"
type="cn.itcast.web.action.RegiserAction"
input="/1.jsp">
</action>
</action-mappings>
<message-resources parameter="MessageResource"></message-resources>
<!--校验配置-->
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames"
value="/org/apache/struts/validator/validator-rules.xml,
/WEB-INF/validation.xml"/>
</plug-in>
</struts-config>
validation.xml 具体校验要求 配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE form-validation PUBLIC
"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.3.0//EN"
"http://jakarta.apache.org/commons/dtds/validator_1_3_0.dtd">
<form-validation>
<global>
<!-- Custom Validator 自定义 校验器 -->
<validator name="twofields"
classname="examples.validator.CustomValidator"
method="validateTwoFields"
methodParams="java.lang.Object,
org.apache.commons.validator.ValidatorAction,
org.apache.commons.validator.Field,
org.apache.struts.action.ActionMessages,
javax.servlet.http.HttpServletRequest"
msg="errors.twofields" />
</global>
<formset>
<!-- Form for Validation example -->
<form name="UserFormBean">
<field property="username" depends="required,minlength,maxlength,mask">
<arg key="用户名" resource="false" position="0" />
<arg name="minlength" key="${var:minlength}" position="1" resource="false"/>
<arg name="maxlength" key="${var:maxlength}" position="1" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>3</var-value>
</var>
<var>
<var-name>maxlength</var-name>
<var-value>6</var-value>
</var>
<var>
<var-name>mask</var-name>
<var-value>[A-Z]{3,6}</var-value>
</var>
</field>
<field property="email" depends="email">
<arg key="邮箱" resource="false" position="0"/>
</field>
<field property="birthday" depends="date">
<arg key="prompt.birthday" position="0"/>
</field>
<field property="password" depends="required,minlength,twofields">
<arg key="密码" position="0" resource="false"/>
<arg name="minlength" key="${var:minlength}" resource="false" position="1"/>
<arg name="twofields" key="确认密码" position="1" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
<var>
<var-name>secondProperty</var-name>
<var-value>password2</var-value>
</var>
</field>
</form>
</formset>
</form-validation>
自定义校验器： CustomValidator.java
/**
* A custom validator example
*
* @version $Rev: 471754 $ $Date: 2006-11-06 08:55:09 -0600 (Mon, 06 Nov 2006) $
*/
public class CustomValidator {
// ------------------------------------------------------------ Constructors
/**
* Constructor for CustomValidator.
*/
public CustomValidator() {
super();
}
// ---------------------------------------------------------- Public Methods
/**
* Example validator for comparing the equality of two fields
*
* http://struts.apache.org/userGuide/dev_validator.html
* http://www.raibledesigns.com/page/rd/20030226
*/
public static boolean validateTwoFields(
Object bean,
ValidatorAction va,
Field field,
ActionMessages errors,
HttpServletRequest request) {
String value =
ValidatorUtils.getValueAsString(bean, field.getProperty());
String property2 = field.getVarValue("secondProperty");
String value2 = ValidatorUtils.getValueAsString(bean, property2);
if (!GenericValidator.isBlankOrNull(value)) {
try {
if (!value.equals(value2)) {
errors.add(
field.getKey(),
Resources.getActionMessage(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(
field.getKey(),
Resources.getActionMessage(request, va, field));
return false;
}
}
return true;
}
}
获得formbean的action
public class RegiserAction extends Action {
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
DynaActionForm daf = (DynaActionForm) form; //username password
String username = daf.getString("username");
String password = daf.getString("password");
String email = daf.getString("email");
System.out.println(username);
User user = new User();
BeanUtils.copyProperties(user, daf); //可以的
return super.execute(mapping, form, request, response);
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>ActionServlet</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>ActionServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
