Struts2对象集合(批量输入)校验 详解
jopen
10年前
最后的目录结构：
addMaterial.jsp:
<%@ page language="java" pageEncoding="gb2312"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <!-- struts2标签库调用声明 --> <%@taglib prefix="s" uri="/struts-tags"%> <%@taglib prefix="sx" uri="/struts-dojo-tags"%> <html> <head> <title>添加材料</title> <s:head /> <sx:head /> </head> <body> <s:fielderror/> <h3 align="left"> Struts2类型转换使用范例 </h3> <!-- 材料输入表单 --> <table> <s:form id="materialForm" action="addMaterial" theme="simple"> <table> <tr> <td>材料名</td> <td>价格</td> <td>库存量</td> <td>过期日期</td> </tr> <s:iterator value="new int[4]" status="m"> <tr> <td><s:textfield name="%{'materialList['+#m.index+'].material'}" /></td> <td><s:textfield name="%{'materialList['+#m.index+'].bid'}" /></td> <td><s:textfield name="%{'materialList['+#m.index+'].mount'}" /></td> <td><sx:datetimepicker name="%{'materialList['+#m.index+'].expireDate'}" /></td> </tr> </s:iterator> <tr> <td colspan="4"><s:submit value="提交"></s:submit> </tr> </table> </s:form> </table> </body> </html>
注释：关于此段代码详细解释见 Struts2 <s:lterator>标签的一个复杂应用 解析。
最终提交的是一个名为materialList的集合实例，它有4个Material类型元素，每个元素都有material、bid、mount、expireDate这四个属性。
struts.xml:
<?xml version="1.0" encoding="gb2312"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <!-- Action所在包定义 --> <package name="Convert" extends="struts-default" > <action name="addMaterial" class="com.action.AddMaterialAction"> <result name="input">/jsp/addMaterial.jsp</result> <result name="success">/jsp/showMaterial.jsp</result> </action> <action name="index"> <result>/jsp/addMaterial.jsp</result> </action> </package> </struts>
注释：表单数据提交经struts.xml配置导航到action="addMaterial"的Action类AddMaterialAction去处理。
AddMaterialAction.java:
package com.action; import java.util.List; import com.model.Material; import com.opensymphony.xwork2.ActionSupport; public class AddMaterialAction extends ActionSupport { private List<Material> materialList; public String execute() throws Exception { return SUCCESS; } public List<Material> getMaterialList() { return materialList; } public void setMaterialList(List<Material> materialList) { this.materialList = materialList; } } 注释：在JSP页面按"提交"按钮后，就相当于"setMaterialList()"方法，实例化一个materialList集合实例。
AddMaterialAction-conversion.properties：
Element_materialList=com.model.Material
注释：定义了List元素都是Material对象（由于定义时是用泛型List<Material>，此处是可缺省的）。
AddMaterialAction-validation:
<?xml version="1.0" encoding="gb2312"?> <!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="materialList"> <field-validator type="visitor"> <param name="context">materialContext</param> <param name="appendPrefix">true</param> <message>添加材料输入校验：</message> </field-validator> </field> </validators>
注释：这是Action类AddMaterialAction的校验配置文件，从命名就可看出来，它放在com.model目录下。其中的格式算是比较统一的，appendPrefix参数设置了true 即在出错信息前都加上message标签中的内容。context参数设置为"materialContext"，Material类校验文件名“-”之间的名字要与之对应,本例为Material-materialContext-validation.xml。
Material.java:
package com.model; import java.util.Date; public class Material implements java.io.Serializable { // Fields private String material; private double bid; private int mount; private Date expireDate; public Material() {} public double getBid() { return bid; } public void setBid(double bid) { this.bid = bid; } public int getMount() { return mount; } public void setMount(int mount) { this.mount = mount; } public String getMaterial() { return this.material; } public void setMaterial(String material) { this.material = material; } public Date getExpireDate() { return expireDate; } public void setExpireDate(Date expireDate) { this.expireDate = expireDate; } } Material-materialContext-validation.xml:
<?xml version="1.0" encoding="gb2312"?> <!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="material"> <field-validator type="requiredstring"> <message>请输入材料名</message> </field-validator> </field> <field name="bid"> <field-validator type="double"> <param name="minExclusive">0.1</param> <message>请输入价格</message> </field-validator> </field> <field name="mount"> <field-validator type="int"> <param name="min">1</param> <message>请输入库存量</message> </field-validator> </field> <field name="expireDate"> <field-validator type="required"> <message>请输入过期日期</message> </field-validator> <field-validator type="date"> <param name="min">2009-01-01</param> <param name="max">2019-01-01</param> <message>输入过期日期无效</message> </field-validator> </field> </validators>
注释：这是对于Material这个Java对象的输入校验配置文件，它放在com.model目录下。
struts.properties：
struts.i18n.encoding=gb2312
注释：使输入支持字符编码集GB2312。
showMaterial.jsp:
<%@ page language="java" pageEncoding="gb2312"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <!-- struts2标签库调用声明 --> <%@taglib prefix="s" uri="/struts-tags"%> <html> <head> <title>添加材料</title> <s:head /> </head> <body> <!-- 材料数据显示 --> <table> <tr> <td>材料名</td> <td>价格</td> <td>库存量</td> <td>过期日期</td> </tr> <s:iterator value="materialList" status="m"> <tr> <td><s:property value="material" ></s:property></td> <td><s:property value="bid" ></s:property></td> <td><s:property value="mount" ></s:property></td> <td><s:property value="expireDate" ></s:property></td> </tr> </s:iterator> </table> </body> </html>
注释：它完成提交的表单数据的显示。
地址栏运行 http://localhost:8080/Convert/jsp/addMaterial.jsp ，显示页面：
直接“提交”后，输出：
输入数据如下：
结果：
