struts2 <s:radio> 和 <s:select>标签

柔情只为你懂 2022-06-04 05:35 201阅读 0赞

在表单中使用`<s:radio> 和 <s:select>`标签 绑定action属性，查询数据

开始界面如下， 通过提交的数据去对应的action查询  
![这里写图片描述][SouthEast]

jsp代码， `<s:radio> 和 <s:select>`标签中的 list 表示数据的来源， value表示给定此标签一个默认值, name表示与action中对应的属性

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <%@ taglib uri="/struts-tags" prefix="s" %>
    <html>
      <head>
    
      </head>
      <% TreeMap<String ,String> searchType = new TreeMap<String, String>(); searchType.put("男", "男"); searchType.put("女", "女"); request.setAttribute("searchType",searchType); TreeMap<String ,String> age = new TreeMap<String, String>(); age.put("1","1岁"); age.put("2","2岁"); age.put("3","3岁"); age.put("4","4岁"); age.put("5","5岁"); request.setAttribute("age",age); %>
    
      <body>
      <s:form action="submit.action?">
            <s:textfield name="info.name" label="姓名"></s:textfield>
            <s:radio list="#request.searchType" label="性别" value="%{'男'}" name="info.sex">
            </s:radio>
    
            <s:select list="#request.age" label="年龄" value="%{'1'}" name="info.age">
            </s:select>
    
            <s:submit value="提交"></s:submit>
      </s:form>
      </body>
    </html>

对应的action类如下， 将结果集放入list，存入request中

public class Action extends ActionSupport{ 
        static TreeMap<String,Info> data = new TreeMap<String, Info>();
        Map<Object, Object> request = new TreeMap<Object, Object>();
        Info info ;
    
        @Override
        public String execute() throws Exception {
            System.out.println(info);
            ActionContext context = ActionContext.getContext();
            request = (Map<Object, Object>) context.get("request");
    
            List<Info> infos = new ArrayList<Info>();
    
            for (Info v : data.values()){
                if (v.getName().equals(info.getName()) && v.getAge().equals(info.getAge()) && v.getSex().equals(info.getSex())){
                    System.out.println(v);
                    infos.add(v);
                }
            }
            System.out.println(infos.size());
            request.put("infos", infos);
            return SUCCESS;
        }
    
        static{
            data.put("1", new Info(1, "张三", "男", 1));
            data.put("2", new Info(2, "张三", "男", 1));
            data.put("3", new Info(3, "赵四", "男", 2));
            data.put("4", new Info(4, "王五", "女", 3));
            data.put("5", new Info(5, "六六", "女", 4));
        }
    
        public Info getInfo() {
            return info;
        }
    
        public void setInfo(Info info) {
            this.info = info;
        }
    
        public Map<Object, Object> getRequest() {
            return request;
        }
    
        public void setRequest(Map<Object, Object> request) {
            this.request = request;
        }
    }

在SUCCESS jsp页面代码如下， 取出request中的list， 用iterator 标签遍历

select的属性  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220604/3c4048bf60e14d3eaefac62d1ddca524.png
[SouthEast 1]: /images/20220604/66a9920841e44f08a4cd2bd54e5b0172.png