Struts2对象集合(批量输入)校验详解

最新推荐文章于 2021-02-12 15:01:41 发布

itzyjr

最新推荐文章于 2021-02-12 15:01:41 发布

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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：