struts consersion & validation

最新推荐文章于 2023-12-08 14:42:12 发布

原创最新推荐文章于 2023-12-08 14:42:12 发布 · 894 阅读

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#struts #validation #string #stylesheet #action #class

本文介绍Struts2框架中表单验证及类型转换的实现方法，包括前端表单设计、JavaScript验证、Struts2内置验证器使用、自定义类型转换器编写等关键内容。

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title>  <mce:script type="text/javascript"></mce:script> </head> <body> <center> <s:fielderror cssStyle="color:red"></s:fielderror> </center> <center> <s:form action="registerAction" theme="simple" onsubmit="return validate()"> <table> <tr> <td> username </td> <td> <s:textfield name="username" label="username" id="usernameId"></s:textfield> </td> </tr> <tr> <td> password </td> <td> <s:password name="password" label="password" id="passwordId"></s:password> </td> </tr> <tr> <td> repassword </td> <td> <s:password name="repassword" label="repassword" id="repasswordId"></s:password> </td> </tr> <tr> <td> age </td> <td> <s:textfield name="age" label="age"></s:textfield> </td> </tr> <tr> <td> birthday </td> <td> <s:textfield name="birthday" label="birthday"></s:textfield> </td> </tr> <tr> <td> graduation </td> <td> <s:textfield name="graduation" label="graduation"></s:textfield> </td> </tr> <tr> <td> <s:submit label=" submit "></s:submit> </td> <td> <s:reset></s:reset> </td> </tr> </table> </s:form> </center> </body> </html> 这是需要的registerjsp页面（viewer）注意到里面的包含taglib的方法。表单的onsubmit="return validate();"

#point0=com.test.converter.PointConverter #point1=com.test.converter.PointConverter #point2=com.test.converter.PointConverter #points=com.test.converter.PointConverter3 这是局部类型转换器文件(RegisterAtion-conversion.properties)的的代码

#com.test.bean.Point=com.test.converter.PointConverter3 全局类型转换器文件(xwork-conversion.properties)里面的key-value

#invalid.fieldvalue.age=age conversion error #invalid.fieldvalue.birthday=birthday conversion error #invalid.fieldvalue.graduation=graduation conversion error struts框架拦截器拦截的类型转换失败的出错信息(RegiterAction.properties)

package com.test.converter; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.struts2.util.StrutsTypeConverter; import com.test.bean.Point; public class PointConverter3 extends StrutsTypeConverter { @Override @SuppressWarnings("unchecked") public Object convertFromString(Map map, String[] as, Class class1) { System.out.println("convertFromString"); List<Point> lst = new ArrayList<Point>(); // 从客户端可知有多个values。或者，这段代码也适用于单个客户端值的情况。 for(String value : as){ Point point = new Point(); String[] paramValues = value.split(","); int x = Integer.parseInt(paramValues[0]); int y = Integer.parseInt(paramValues[1]); point.setX(x); point.setY(y); lst.add(point); } return lst; } @Override @SuppressWarnings("unchecked") public String convertToString(Map map, Object obj) { System.out.println("convertToString"); List<Point> lst = (ArrayList<Point>)obj; StringBuilder sb = new StringBuilder(); sb.append("[ "); int number = 0; for(Point point : lst){ ++number; int x = point.getX(); int y = point.getY(); sb.append(number).append(" x=").append(x).append(",y=").append(y).append("/n"); } sb.append(" ]"); return sb.toString(); } }

PointConverter.java extends StrutsTypeConverter

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> <validators>   <field name="username"> <field-validator type="requiredstring"> <param name="trim">true</param> <message>username should not be blank!</message> </field-validator> <field-validator type="stringlength"> <param name="trim">true</param> <param name="maxLength">10</param> <param name="minLength">6</param> <message>username should be between ${minLength} and ${maxLength}</message> </field-validator> </field> <field name="password"> <field-validator type="requiredstring"> <message>password should not be blank!</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">6</param> <param name="maxLength">10</param> <message>password should be between ${minLength} and ${maxLength}</message> </field-validator> </field> <field name="repassword"> <field-validator type="requiredstring"> <message>repassword should not be blank!</message> </field-validator> <field-validator type="stringlength"> <param name="minLength">6</param> <param name="maxLength">10</param> <message>repassword should be between ${minLength} and ${maxLength}</message> </field-validator> </field> <field name="age"> <field-validator type="int"> <param name="min">1</param> <param name="max">150</param> <message>age should be between ${min} and ${max}</message> </field-validator> </field> <field name="birthday"> <field-validator type="required"> <message>birthday should not be blank!</message> </field-validator> <field-validator type="date"> <param name="min">2001-01-01</param> <param name="max">2003-01-01</param> <message>birthday should be between ${min} and ${max}</message> </field-validator> </field> <field name="graduation"> <field-validator type="required"> <message>graduation should not be blank!</message> </field-validator> <field-validator type="date"> <param name="min">2005-01-01</param> <param name="max">2007-12-31</param> <message>graduation should be between ${min} and ${max}</message> </field-validator> </field> </validators> struts2校验框架的字段校验和非字段校验

类型转换应该是应用在表单提交的时候一些比较特殊的类型转换的时候的

toType

1、string

if(Point.class == toType) // 从客户端到服务端

{

String[] str = (String[])value;

}

getParameter(String name);

getParameterValues(String name);

// 局部变量的配置方法。。

XXXAcion-conversion.properties

key - value