Question

struts2标签中s:iterator如何循环遍历某一实体下的set集合数据？？？？？

Answer 1

pojo
public class User
{

int id;
string name;
int age;
string address;

//getter and setter methods;
}

dao

Set<User> users = userDao.getAllUser();//返回所有的user对象，并封装成Set集合

action

Set <User> users;
UserDao userDao;
//getter and setter

public String getAllUser()
{
users = userDao.getAllUser();
}

jsp

<table>
<tr>
<th>用户ID</th>
<th>用户名</th>
<th>用户年龄</th>
<th>用户地址</th>
</tr>

<s:iterator value="users">
<tr>
<th>${id}</th>
<th>${name}</th>
<th>${age}</th>
<th>${address}</th>
</tr>
</s:iterator>
</table>

Answer 2

假设后台
Set aset= xxxx;
request.setAttribute("set1", aset);

jsp页面：
<s:iterator value="set1" id="sstt">
<s:property value="sstt"/>
</s:iterator >

Answer 3

首先，基础编程知识要好！