网站建设销售一个月营业额,哈尔滨网站建设方案服务,创建一个软件需要多少钱,室内设计师培训网课在jsp servlet中我们通常使用Servlet Filter控制用户是否登入#xff0c; 是否有权限转到某个页面。在struts2中我们应该会想到他的拦截器(Interceptor)#xff0c; Interceptor在struts2中起着非常重要的作用。很多struts2中的功能都是使用Interceptor实现的。 需求#xf… 在jsp servlet中我们通常使用Servlet Filter控制用户是否登入 是否有权限转到某个页面。在struts2中我们应该会想到他的拦截器(Interceptor) Interceptor在struts2中起着非常重要的作用。很多struts2中的功能都是使用Interceptor实现的。 需求简单的登入界面让用户输入用户名密码记住密码(remember me)。如果用户选中remember me的话下次就不需要再登入了(使用cookie实现 用需要点击logout取消remeber me功能)。如果用户起始输入的地址不是登入页面的话,在用户登入之后需要转到用户输入的起始地址。
功能概图 项目文件概图 struts.xml 配置部分 !-- 演示权限控制 --package nameauthority extendsstruts-default namespace/authorityinterceptorsinterceptor nameloginInterceptor classcom.gq.action.LoginInterceptor/interceptor-stack nameloginDefaultStackinterceptor-ref nameloginInterceptor/interceptor-ref namedefaultStack//interceptor-stack/interceptorsdefault-interceptor-ref nameloginDefaultStack/global-resultsresult namelogin typeredirect/authority/login.jsp/result/global-results action nameIndex classcom.gq.action.IndexActionresult/authority/main.jsp/resultinterceptor-ref nameloginDefaultStack//actionaction nameLogout classcom.gq.action.LogoutAction/actionaction nameLogin classcom.gq.action.LoginAction methodloginresult typeredirect${goingToURL}/resultresult nameinput/authority/login.jsp/resultinterceptor-ref namedefaultStack//action!-- 没有实现 class action nameRegister classcom.gq.action.LoginActionresult typeredirect/authority/login.jsp/resultresult nameinput/authority/register.jsp/resultinterceptor-ref namedefaultStack//action--/package各文件描述和源代码 IndexAction.java直接跳转到 main.jsp该action 名称为 “Index”并配置有登陆权限验证拦截器
public class IndexAction extends ActionSupport {private static final long serialVersionUID 7078603236740619967L;Overridepublic String execute() throws Exception {// Just return to /main.jspreturn SUCCESS;}}LoginAction.java验证“登陆名”和“密码”是否正确保存“用户”到 Session中并根据参数决定是否保存Cookie 其中要判断
1、用户直接进入 login.jsp的页面验证成功后跳转到 main.jsp页面。
2、用户从其他页面 xxx.jsp因为没有权限验证失败而回到 login.jsp则验证成功后跳转到 xxx.jsp页面。
这里为了演示简化xxx.jsp 就指定为 main.jsp 页面 public class LoginAction extends ActionSupport implements ServletResponseAware, SessionAware {private static final long serialVersionUID 2965422004870746408L;private String loginName;private String password;private boolean rememberMe;private HttpServletResponse response;private Map session;private String goingToURL;public String getGoingToURL() {return goingToURL;}public void setGoingToURL(String goingToURL) {this.goingToURL goingToURL;}public boolean isRememberMe() {return rememberMe;}public void setRememberMe(boolean rememberMe) {this.rememberMe rememberMe;}public String getLoginName() {return loginName;}public void setLoginName(String loginName) {this.loginName loginName;}public String getPassword() {return password;}public void setPassword(String password) {this.password password;}public void setServletResponse(HttpServletResponse response) {this.response response;}public void setSession(Map session) {this.session session;}public String login() throws Exception {System.out.println(In login... getLoginName());try {User user new UserDAO().attemptLogin(getLoginName(), getPassword());//Add cookieif (rememberMe) {response.addCookie(createCookie(user));}//Add into sessionsession.put(LoginInterceptor.USER_SESSION_KEY, user);String goingToURL (String) session.get(LoginInterceptor.GOING_TO_URL_KEY);if (StringUtils.isNotBlank(goingToURL)){setGoingToURL(goingToURL);session.remove(LoginInterceptor.GOING_TO_URL_KEY);} else {setGoingToURL(Index.action);}return SUCCESS;} catch (UserNotFoundException e) {addActionMessage(user name or password is not corrected.);return INPUT;}}Cookie createCookie( User user ){int SEVEN_DAYS 60 * 60 * 24 * 7;Cookie cookie new Cookie(LoginInterceptor.COOKIE_REMEMBERME_KEY, createValue(user));cookie.setMaxAge(SEVEN_DAYS);return cookie;}String createValue( User user ){return user.getLoginName() user.getPassword();}
}LoginInterceptor.java登陆拦截器根据 Session判断用户是否在线或根据Cookie解析能否登陆。 public class LoginInterceptor extends AbstractInterceptor {private static final long serialVersionUID -5889213773673649255L;public static final String USER_SESSION_KEY wallet.session.user;public static final String COOKIE_REMEMBERME_KEY wallet.cookie.rememberme;public static final String GOING_TO_URL_KEY GOING_TO;public static final String LOGIN login;Overridepublic String intercept(ActionInvocation invocation) throws Exception {System.out.println(In LoginInterceptor...);ActionContext actionContext invocation.getInvocationContext();HttpServletRequest request (HttpServletRequest) actionContext.get(StrutsStatics.HTTP_REQUEST);//用户在登录状态MapString,String session actionContext.getSession();if (session ! null session.get(USER_SESSION_KEY) ! null) {System.out.println(In user is login, saved information in session...);return invocation.invoke();}//用户从Cookie中解析信息然后登录return loginFromCookie(request, invocation, session);}String loginFromCookie(HttpServletRequest request, ActionInvocation invocation,Map session) throws Exception{System.out.println(In loginFromCookie...);Cookie[] cookies request.getCookies();if( cookies null ){ //No cookiessetGoingToURL(session, invocation);return LOGIN;}Cookie cookie findCookieByName( cookies );if( cookie null ){ //No cookie by the namesetGoingToURL(session, invocation);return LOGIN;}String loginName parseLoginName( cookie );String password parsePassword( cookie );if( loginName null || password null ){ //parse loginName or password fail...setGoingToURL(session, invocation);return LOGIN;}try {User user new UserDAO().attemptLogin(loginName, password);session.put(USER_SESSION_KEY, user);return invocation.invoke();} catch (UserNotFoundException e) {setGoingToURL(session, invocation);return LOGIN;}}Cookie findCookieByName(Cookie[] cookies) {for( Cookie cookie : cookies ){if(COOKIE_REMEMBERME_KEY.equals(cookie.getName())){return cookie;}}return null;}String parsePassword(Cookie cookie) {String value cookie.getValue();if (StringUtils.isBlank(value)) {return null;}String[] split value.split();if( split.length 2 ){return null;}return split[1];}String parseLoginName(Cookie cookie) {String value cookie.getValue();if (StringUtils.isBlank(value)) {return null;}String[] split value.split();return split[0];}private void setGoingToURL(Map session, ActionInvocation invocation) {String url ;String namespace invocation.getProxy().getNamespace();if (StringUtils.isNotBlank(namespace) !namespace.equals(/)) {url url namespace;}String actionName invocation.getProxy().getActionName();if (StringUtils.isNotBlank(actionName)) {url url / actionName .action;}session.put(GOING_TO_URL_KEY, url);}
}LogoutAction.java注销清空Session中的信息删除Cookie public class LogoutAction extends ActionSupport implements ServletRequestAware,ServletResponseAware {private static final long serialVersionUID -7680746852412424580L;private HttpServletRequest request;private HttpServletResponse response;public void setServletRequest(HttpServletRequest request) {this.request request;}public void setServletResponse(HttpServletResponse response) {this.response response;}public String execute() throws Exception {System.out.println(In logout... getNameForLogout());removeFromSession();removeFromCookies();return login;}void removeFromSession() {HttpSession session request.getSession(false);if (session ! null)session.removeAttribute(LoginInterceptor.USER_SESSION_KEY);}void removeFromCookies() {Cookie[] cookies request.getCookies();if (cookies ! null) {for (Cookie cookie : cookies) {if (LoginInterceptor.COOKIE_REMEMBERME_KEY.equals(cookie.getName())) {cookie.setValue();cookie.setMaxAge(0);response.addCookie(cookie);return;}}}}String getNameForLogout(){HttpSession session request.getSession(false);if( session null){return Session is null...;}User user (User)session.getAttribute(LoginInterceptor.USER_SESSION_KEY);return user.getLoginName();}
}
User.java一个简单的JavaBean public class User {// Used for loginprivate String loginName;private String password;// Information of userprivate String name;private String sex;private int age;//get/set 方法Overridepublic boolean equals(Object object) {if(objectnull || getClass()!object.getClass()){return false;}User user (User)object;return strEquals(getLoginName(), user.getLoginName()) strEquals(getPassword(), user.getPassword()) strEquals(getName(), user.getName()) strEquals(getSex(), user.getSex()) getAge() user.getAge();}private boolean strEquals( String s1, String s2 ){if( s1 null ){return false;}return s1.equals(s2);}Overridepublic int hashCode() {int result 47;result 37*result Integer.valueOf(age).hashCode();result 37*result (loginNamenull ? 0 : loginName.hashCode());result 37*result (passwordnull ? 0 : password.hashCode());result 37*result (namenull ? 0 : name.hashCode());result 37*result (sexnull ? 0 : sex.hashCode());return result;}}UserDAO.java一个简单的模拟的dao public class UserDAO {private static MapString, User users new HashMapString, User();public UserDAO(){mockUsers();}public User attemptLogin(String loginName, String password) throws UserNotFoundException{User user;if( (userfindUser(loginName)) null ){throw new UserNotFoundException(Invalid User!);}if( !validPassword(password, user) ){throw new UserNotFoundException(Invalid Password!);}return user;}User findUser( String loginName ){return users.get(loginName);}boolean validPassword( String password, User user ){return password.equals(user.getPassword());}private void mockUsers(){User zhangsan new User();zhangsan.setLoginName(zhangsanqq.com);zhangsan.setPassword(zhangsan123);zhangsan.setName(zhangsan);zhangsan.setAge(22);zhangsan.setSex(man);User lisi new User();lisi.setLoginName(lisiqq.com);lisi.setPassword(lisi123);lisi.setName(lisi);lisi.setAge(25);lisi.setSex(woman);User wangwu new User();wangwu.setLoginName(wangwuqq.com);wangwu.setPassword(wangwu123);wangwu.setName(wangwu);wangwu.setAge(27);wangwu.setSex(man);users.put(zhangsan.getLoginName(), zhangsan);users.put(lisi.getLoginName(), lisi);users.put(wangwu.getLoginName(), wangwu);}
}UserNotFoundException.java之定义封装的一个 Exception public class UserNotFoundException extends Exception{private static final long serialVersionUID -5207325846250567308L;public UserNotFoundException( String message ){super( message );}}login.jsp登陆页面 % page languagejava pageEncodingUTF-8%
%taglib prefixs uri/struts-tags %
%
String path request.getContextPath();
String basePath request.getScheme()://request.getServerName():request.getServerPort()path/;
%!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
htmlheadbase href%basePath%titleLogin/title/headbody
h2Login/h2
s:actionmessage/
s:actionerror/
s:form action/authority/Login.action methodpost validatefalse themexhtmls:textfield nameloginName labelUsername/s:textfieldbr/s:password namepassword labelPassword/s:passwordbr/s:checkbox labelRemember Me namerememberMe/s:checkboxs:submit value%{Login}/s:submit
/s:form
a href/test_struct2/authority/register.jspRegister/a
/body
/html main.jsp主页面 % page languagejava pageEncodingISO-8859-1%
%
String path request.getContextPath();
String basePath request.getScheme()://request.getServerName():request.getServerPort()path/;
%!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN
htmlheadbase href%basePath%titleMy JSP main.jsp starting page/titlemeta http-equivpragma contentno-cachemeta http-equivcache-control contentno-cachemeta http-equivexpires content0 meta http-equivkeywords contentkeyword1,keyword2,keyword3meta http-equivdescription contentThis is my page!--link relstylesheet typetext/css hrefstyles.css--/headbodyThis is Main page. bra href/test_struct2/authority/Logout.actionLogout/a/body
/htmlregister.jsp 未实现。。。
