struts2 s:select 标签使用

1 静态生成

<s:select name="user.sex" list="#{'0':'男','1':'女'}" label="性别" headerKey="" headerValue="请选择性别"></s:select> 

注解：这里从页面来静态（也就是在页面中写死啦）构造下拉选项，关键点是list=”#{‘0’:’男’,’1’:’女’}” 通过它实现的select的两个option 。headerKey指定缺省的选项”key”,headerValue指定缺省的选项”value”。

2.设置下拉框数据源

<%          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> 

value的值设置为了2，所以初始化下拉框时，会自动选择key值为2的选项

3.action传递list过来
entity

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

action

xxxAction extends  extends ActionSupport {      private  List<Program> programs ;//list集合         public List<Program> getPrograms() {          return programs;      }      public void setPrograms(List<Program> programs) {              this.programs = programs;      }  } 

JSP页面

<s:select list="programs "  listValue="programName " listKey="programid "  name="program" id="program"             headerKey="0l" headerValue="" >  </s:select> 

listKey说明下拉框的key值对应 programid字段，listValue说明下拉框的显示部分对应programName字段

转载自：http://blog.csdn.net/q3498233/article/details/7057230