struts2中表现层的数据展现（bean,list,iterator,format,etc）

假定在Action中通过get/set了绑定了一个ModelAndView 的bean，用于渲染页面的数据。在实际的开发中，这个bean可能包含了各种页面需要的信息，因此会相当复杂。

设定：bean mv

public class CompanyMV {private Company company;private List<City> cities;private List<Currency> currencies;private List<Moneystyle> moneystyles;private List<Customer> customers;       //.......        private File logofile;private String logofileContentType;private String logofileFileName;       //..get/set}

1，遍历(iterator)

1.1） 包含html

    <select name="mv.company.cityid">     <s:if test="mv.cities.size>0">    <s:set name="cities" value="mv.cities" scope="session"/>    </s:if>    <s:iterator value="#session.cities" var="city">    <option value="${city.cityid}"     <s:if test="#city.cityid == mv.company.cityid "> SELECTED </s:if>  >    <s:property value="name" />   <s:property value="state"/>    </option>    </s:iterator>    </select> 

Note: 此处通过<s:set>设置cities的值到session, 为了防止表单验证之后的list值丢失。如果不通过<s:set>也可使用在form中隐含变量的方式，eg

<s:iterator value="mv.qualitys" status="stat" var="item">            <input type="hidden" name="mv.qualitys[<s:property value="#stat.index" />].id.qualityindex" value="<s:property value="#item.id.qualityindex" />" />            <input type="hidden" name="mv.qualitys[<s:property value="#stat.index" />].qualityvalue" value="<s:property value="#item.qualityvalue" />" />        </s:iterator>

 此处的id是qualitys的复合primary key. (通过hibernate生成)

固定的list

    <select id="mv.company.payterms" name="mv.company.payterms">        <option value="On Due Date" <s:if test="\"On Due Date\" == mv.company.payterms"> SELECTED </s:if> ><s:text name="comp.locmain.compform.slct.ondate"/></option>        <option value="Due on the 1st" <s:if test="\"Due on the 1st\" == mv.company.payterms"> SELECTED </s:if> ><s:text name="comp.locmain.compform.slct.onfir"/></option>        <option value="Due on the 5th" <s:if test="\"Due on the 5th\" == mv.company.payterms"> SELECTED </s:if> ><s:text name="comp.locmain.compform.slct.onfif"/></option>        <option value="Net 15"  <s:if test="\"Net 15\" == mv.company.payterms"> SELECTED </s:if> ><s:text name="comp.locmain.compform.slct.netfit"/></option>        <option value="Net 30" <s:if test="\"Net 30\" == mv.company.payterms"> SELECTED </s:if> ><s:text name="comp.locmain.compform.slct.netthi"/></option>      </select> 

      

1.2） 利用tag

<s:select name="mv.locid" list="mv.floors" listKey="locid" listValue="shortdescription" />

1.3） 包含for循环的java代码

<select name="curi_servicecutoff">                <%                    for (int current = 16; current < 29; current++) {                        request.setAttribute("current", current);                %>                    <option value="${current}" <s:if test="#request.current == curi_servicecutoff"> SELECTED </s:if> > <s:property value="#request.current" /> </option>                <%                    }                %></select>

2，格式化(format)

2.1） 数字

<input type="text" size="20" maxlength="5"name="mv.qualitys[<s:property value="#stat.index" />].qualityvalue" value="<s:text name="global.format.number.nopositionif"><s:param name="value" value="#item.qualityvalue" /></s:text>" />

Note：global.format.number.nopositionif在多语言资源文件中定义，eg

global.format.number.noposition={0,number,##########}global.format.number.nopositionif={0,number,##########.##}global.format.number.2position={0,number,##########.00}global.format.date.normal={0,date,yyyy-MM-dd}

3，集合（List，Array，Set）的显示

直接看代码，仔细阅读，不解析

<s:iterator status="stat" value="mv.suites" var="item"> <tr><td>  <input type="text" size="7" maxlength="7" name="mv.suites[<s:property value="#stat.index" />].officeid" value="<s:property value="#item.officeid" />" >  <input type="hidden" name="mv.suites[<s:property value="#stat.index" />].suiteid" value="<s:property value="#item.suiteid" />" /></td><td>  <input type="text" size="8" maxlength="10" style="text-align:right" name="mv.suites[<s:property value="#stat.index" />].size" value="<s:property value="#item.size" />" onkeyup="javascript:changeEstRent()"></td><td>  <input type="text" size="9" maxlength="10" style="text-align:right" name="mv.suites[<s:property value="#stat.index" />].cost" value="<s:property value="#item.cost" />" readonly></td><td>  <input type="text" size="15" maxlength="20" name="mv.suites[<s:property value="#stat.index" />].shortdescription" value="<s:property value="#item.shortdescription" />"></td><td>  <input type="text" size="20" maxlength="132" name="mv.suites[<s:property value="#stat.index" />].longdescription" value="<s:property value="#item.longdescription" />"></td><td>  <input type="text" size="2" maxlength="2" name="mv.suites[<s:property value="#stat.index" />].workstation" value="<s:property value="#item.workstation" />"></td><td>  <input type="text" size="4" maxlength="4" name="mv.suites[<s:property value="#stat.index" />].link" value="<s:property value="#item.link" />"></td><td><select name="mv.suites[<s:property value="#stat.index" />].rentable" onchange="javascript:changeEstRent()"  ><option value="Y" <s:if test="\"Y\" == #item.rentable"> SELECTED </s:if> ><s:text name="setup.month"/></option><option value="H" <s:if test="\"H\" == #item.rentable"> SELECTED </s:if> ><s:text name="setup.hour"/></option><option value="N" <s:if test="\"N\" == #item.rentable"> SELECTED </s:if> ><s:text name="setup.na"/></option><option value="R" <s:if test="\"R\" == #item.rentable"> SELECTED </s:if> ><s:text name="setup.registration"/></option></select><input type="hidden" name="mv.suites[<s:property value="#stat.index" />].crate" value="<s:property value="#item.crate" />" /><input type="hidden" name="mv.suites[<s:property value="#stat.index" />].ncrate" value="<s:property value="#item.ncrate" />" /><input type="hidden" name="mv.suites[<s:property value="#stat.index" />].arate" value="<s:property value="#item.arate" />" /><input type="hidden" name="mv.suites[<s:property value="#stat.index" />].roomtype" value="<s:property value="#item.roomtype" />" /></td><td><select name="mv.suites[<s:property value="#stat.index" />].quality" onchange="javascript:changeEstRent()"><option value="0">--</option><s:iterator status="stat" value="mv.qualitys" var="qitem"><option value="<s:property value="#qitem.id.qualityindex" />" <s:if test="#qitem.id.qualityindex == #item.quality "> SELECTED </s:if>  ><s:property value="id.qualityindex" />(<s:property value="qualityvalue" />)</option></s:iterator></select></td><td>  <input type="text" size="12" style="text-align:right" name="mv.suites[<s:property value="#stat.index" />].targetrent" value="<s:property value="#item.targetrent" />" readonly></td></tr>