Struts2.0与客户端数据的交互
(一)客户端获取Action中数据-----------------------
在struts2中,设进session的话则应该变成这样了,因为session是一个map类型:
- public String findAllUsers() throws Exception {
- List<User> userList = userService.findAllUsers();
- session.put("userList", userList);
- //request.setAttribute("userList", userList);
- return SUCCESS;
- }
据说,如果直接到jsp页面的话,一般推荐用request而不用session,多人单机同时操作的话保险一点,虽然一个浏览器同一时间只有一个session。
在jsp页面取值的话:
- <table class="table_report">
- <tr>
- <th>用户ID</th>
- <th>用户名称</th>
- <th>用户性别</th>
- <th>用户年龄</th>
- <th>用户地址</th>
- <th>用户电话</th>
- <th>用户邮箱</th>
- </tr>
- <!-- struts2最正规的取值方式 -->
- <%-- <s:iterator id="user" value="%{#session.userList}">--%>
- <s:iterator id="user" value="#session.userList">
- <%-- <s:iterator id="user" value="#request.userList">--%>
- <tr>
- <td>${user.id}</td>
- <td>${user.name}</td>
- <td>${user.sex}</td>
- <td>${user.age}</td>
- <td>${user.address}</td>
- <td>${user.phone}</td>
- <td>${user.email}</td>
- </tr>
- </s:iterator>
- </table>
- <%-- 用完要清空 --%>
- <%request.removeAttribute("userList");%>
- <%--<%session.removeAttribute("userList");%>--%>
(二)Action中获取客户端数据-----------------------
1.通过属性驱动式
- <form action="sys/login.action" method="post">
- <input type="text" name="username">
- <input type="submit" value="submit">
- </form>
Action:直接通过get、set方法获取。
- ublic class sysAction extends ActionSupport{
- private String username;
- public String login() throws Exception {
- System.out.println(username);
- return SUCCESS;
- }
- public String getUsername() {
- return username;
- }
- public void setUsername(String username) {
- this.username= username;
- }
- }
2.模型驱动方式,必须要实现ModelDriven<T>接口。对于要传入多个model第二种方式不方便
- <form action="sys/login.action" method="post">
- <input type="text" name="username">
- <input type="submit" value="submit">
- </form>
Action:必须实现getModel() 方法
- public class sysAction extends ActionSupport implements ModelDriven<User>{
- private User user;
- public String login() throws Exception {
- System.out.println(getModel().getUsername());
- return SUCCESS;
- }
- public User getModel() {
- if (null == user) {
- return user = new User();
- }
- return user;
- }
- }
3.第三种方式可以完全不实现ModelDriven<T>,也可使用多个model对象的属性。
- <form action="sys/login.action" method="post">
- <input type="text" name="user.username">
- <input type="text" name="teacher.level">
- <input type="submit" value="submit">
- </form>
Action: 必须提供set方法
- public class sysAction extends ActionSupport{
- private User user;
- private Teacher teacher;
- public String login() throws Exception {
- System.out.println(user.getUsername());
- System.out.println(teacher.getLevel());
- return SUCCESS;
- }
- public void setUser(User user) {
- this.user = user;
- }
- public void setTeacher(Teacher teacher) {
- this.teacher = teacher;
- }
- }