struts2中s:select标签的使用

[b]举例说明 struts2中s:select标签的使用[/b] :arrow:

1.第一个例子：

<s:select list="{'aa','bb','cc'}" theme="simple" headerKey="00" headerValue="00"></s:select>

2.第二个例子：

<s:select list="#{1:'aa',2:'bb',3:'cc'}" label="abc" listKey="key" listValue="value" headerKey="0" headerValue="aabb">

3.第三个例子：

<%
java.util.HashMap map = new java.util.LinkedHashMap();
map.put(1,"aaa");
map.put(2,"bbb");
map.put(3,"ccc");
request.setAttribute("map",map);
request.setAttribute("aa","2");
%>
<s:select list="#request.map" label="abc" listKey="key" listValue="value"
value="#request.aa" headerKey="0" headerValue="aabb"></
s:select
>
headerKey headerValue 为设置缺省值
摘抄自 http://www.cnblogs.com/modou/articles/1326683.html

4.第四个例子

public class Program implements Serializable {
/** serialVersionUID */
private static final long serialVersionUID = 1L;
private String programId;
private String programName;
public String getProgramId() {
return programId;
}
public void setProgramId(String programId) {
this.programId = programId;
}
public String getProgramName() {
return programName;
}
public void setProgramName(String programName) {
this.programName = programName;
}
}

在 class Xxx extends ActionSupport {
private List<Program> programs ;
public List<Program> getPrograms() {
return programs;
}
public void setPrograms(List<Program> programs) {
this.programs = programs;
}
}

[u]在jsp页面中[/u]
<s:select list="[color=red]programs[/color]" listValue="[color=orange]programName[/color]" listKey="[color=green]programId[/color]" name="program" id="program" headerKey="0l" headerValue=" " value="[color=blue]bean.programid[/color]">
</s:select>

[color=red]红色[/color]部分为在action里面的list
[color=orange]橙色[/color]部分为<option value="xxx">value</option>对应bean里面的字段programName
[color=green]绿色[/color]部分为<option value="xxx",对应bean里面的字段programId
[color=blue]蓝色[/color]部分为设定select被选中的值,s:select 会自动在bean选中key对应的值

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