Struts2之ModelDriven接口实现登陆及退出

当用POST方式提交表单，提交的数据量大时，action中定义各种数据，并实现get/set请求就显得过于臃肿，改用Struts2的ModelDriven接口来获取用户提交的HTTP请求，只需要定义相应的Model，Struts2框架会自动将用户提交的HTTP信息赋给相应的Model。
对项目中的LoginAction进行修改，采用ModelDriven方式。

LoginModel

首先，系统采用电话+密码的登陆方式，建立对应的LoginModel.java。

public class LoginModel {    private String telephone;    private String password;    public String getTelephone() {        return telephone;    }    public void setTelephone(String telephone) {        this.telephone = telephone;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }}

LoginAction

表单提交的action继承ModelDriven接口，实现getter方法，重载execute方法。

@ParentPackage(value = "json-default")@Controller@Action(value = "/loginAction2", results = { @Result(name = "success", type = "redirect", location = "/index.jsp"),        @Result(name = "input", type = "redirect", location = "/login.html"),        @Result(name = "error", type = "redirect", location = "/login.html") }, exceptionMappings = {                @ExceptionMapping(exception = "java.lang.Exception", result = "error") })public class LoginAction2 extends BaseAction implements ModelDriven<LoginModel> {    private static final long serialVersionUID = 1L;    @Resource    private IUserService userManagerImpl;    private LoginModel login = new LoginModel();    @Override    public LoginModel getModel() {        // TODO Auto-generated method stub        return login;    }    // 重载    public String execute() throws Exception {        String password = login.getPassword();        String telephone = login.getTelephone();        if (password != null && !"".equals(password)) {            // password = MD5.MD5Encode(password);        }        if (telephone == null || telephone == "" || password == null || password == "")            return INPUT;        Subject subject = SecurityUtils.getSubject();        UsernamePasswordToken token = new UsernamePasswordToken(telephone, password);        token.setRememberMe(true);// 记住我        try {            // 登录，即进行身份验证操作            subject.login(token);// 调用 myRealm的 doGetAuthenticationInfo方法            String telephone2 = (String) subject.getPrincipal();// 登陆成功就可以这样子拿到用户名了            User user = userManagerImpl.queryByTel(telephone2);            subject.getSession().setAttribute("uname", user.getName());        } catch (UnknownSessionException uae) {            subject.getSession().setAttribute("myerror", "登录异常!");            return ERROR;        } catch (UnknownAccountException ex) {            subject.getSession().setAttribute("myerror", "用户名不存在!");            return INPUT;        } catch (IncorrectCredentialsException ice) {            subject.getSession().setAttribute("myerror", "密码错误!");            return INPUT;        } catch (LockedAccountException lae) {            subject.getSession().setAttribute("myerror", "登录异常!");            return INPUT;        } catch (AuthenticationException e) {            subject.getSession().setAttribute("myerror", "用户登录失败!");            return INPUT;        }        return SUCCESS;    }    public String logout() throws Exception {        Subject subject = SecurityUtils.getSubject();        if (subject.isAuthenticated()) {            subject.logout(); // session 会销毁，在SessionListener监听session销毁，清理权限缓存        }        return INPUT;    }}

注意subject.getSession().setAttribute(arg0, arg1);shiro的seeion，可以在login.jsp页面获取到错误类型。

<%    Object error = session.getAttribute("myerror");     if(error==null)        error=" "; %> <form action="login.action">    ...    <label style="color:red"><%=error%></label>    <div class="form-group">        <input type="text" name="telephone" class="email"            placeholder="请输入电话" autocomplete="off" required="required" />    </div>    <div class="form-group ">        <input type="password" name="password" class="password"            placeholder="请输入密码" autocomplete="off" required="required" />    </div>    ...</form>

LogoutAction

注销账号退出系统，可以在LoginAction中添加一个logout方法，直接调用loginAction!logout.action，或者重新写一个Action

@ParentPackage(value = "json-default")@Controllerpublic class LogoutAction extends BaseAction {    private static final long serialVersionUID = 1L;    @Action(value = "/logoutAction", results = {             @Result(name = "success", type = "redirect", location = "/login.jsp"),            @Result(name = "error", type = "redirect", location = "/index.jsp") }, exceptionMappings = {                    @ExceptionMapping(exception = "java.lang.Exception", result = "error") })    public String logout() throws Exception {        Subject subject = SecurityUtils.getSubject();        if (subject.isAuthenticated()) {            subject.logout(); // session 会销毁，在SessionListener监听session销毁，清理权限缓存        }        return SUCCESS;    }}

调用logoutAction.action即可。