Struts2-学习笔记系列(12)-set集合

 1 public class UserConvert extends StrutsTypeConverter {
 2     @Override
 3     public Object convertFromString(Map map, String[] strings, Class aClass) {
 4         Set result = new HashSet();
 5         for (int i = 0; i < strings.length; i++) {
 6             User user = new User();
 7             String[] vals = strings[0].split(",");
 8             user.setName(vals[0]);
 9             user.setPwd(vals[1]);
10             result.add(user);
11         }
12         return result;
13     }
14 
15     @Override
16     public String convertToString(Map map, Object o) {
17         if (o.getClass() == Set.class) {
18 
19             Set users = (Set) o;
20             String result = "[";
21             for (Object obj : users) {
22                 User user = (User) obj;
23                 if (user != null && user.getName() != null) {
24                     result += "<" + user.getName() + "," + user.getPwd() + ">";
25                 }
26 
27             }
28             return result + "]";
29         } else {
30             return "";
31         }
32 
33     }
34 
35 }

 1 public class User {
 2     public User() {
 3     }
 4 
 5     private String name;
 6     private String pwd;
 7 
 8     public String getPwd() {
 9         return pwd;
10     }
11 
12     public void setPwd(String pwd) {
13         this.pwd = pwd;
14     }
15 
16     public String getName() {
17         return name;
18     }
19 
20     public void setName(String name) {
21         this.name = name;
22     }
23 
24     @Override
25     public boolean equals(Object obj) {
26 
27 //        表明：action中的set user，使用元素name属性进行区分(set集合不能有重复项)
28 
29 
30         if (this==obj) {
31             return true;
32         }
33         if (obj != null && obj.getClass() == User.class) {
34             User user = (User) obj;
35             return this.getName().equals(user.getName());
36         }
37         return false;
38     }
39 
40     @Override
41     public int hashCode() {
42         return name.hashCode();
43     }
44 }

1 <s:form action="login">
2     <s:textfield name="users" label="第一个用户信息"/>
3     <s:textfield name="users" label="第二个用户信息"/>
4     <tr>
5         <td colspan="2"><s:submit value="转换" theme="simple"/>
6             <s:reset value="重填" theme="simple"/></td>
7     </tr>
8 </s:form>

1 <s:property value="users"/>
2 <!-- 访问users集合属性里索引属性值为zcx的元素的name属性-->
3 用户zcx的用户名为：<s:property value="users(‘zcx‘).name"/><br/>
4 <!-- 访问users集合属性里索引属性值为zjj的元素的name属性-->
5 zjj：<s:property value="users(‘zjj‘).name"/><br/>