SSO在我们的应用中非常常见,例如我们在OA系统登录了,我们就可以直接进入采购系统,不需要再登录了,这样使我们非常方便。现在网上也有很多实现方法,于是乎我也想写一个看看。我主要用到的是cookie的机制。在此,分享给大家,同时提供源代码下载。
进入主题:
工程说明
SSO的实现一般是会有一个SSO Server,也会叫认证中心,同时也会有被认证的系统,如OA系统、采购系统等,他们就相当于SSO Server的client。
为了更形象体现SSO,我写的SSO是有三个工程:一个SSO Server端口为8081,一个OA系统端口为8082,一个采购系统端口为8083。如图:
流程介绍
在整个SSO流程当,有两个流程非常重要,第一个是用户没有登录系统到登录系统的过程;第二是用户在一个系统当中已经登录(例如在OA系统中登录 了),但又想进入另一个系统(例如进入PRO系统)的过程,如果把这两个过程搞定了,那么SSO也就搞定了。我画了两幅图来说明这两个过程。
先看用户没有登录系统到登录系统的过程,如图:
1:用户通过URL访问OA系统。
2:在OA系统中的filter发现这个URL没有ticket(你暂且就把ticket看做是门票),此时就会跳转到SSO Server。
3:SSO Server中的filter发现该客户端中的cookie中没有相应信息,也即是一个没有登录的用户,那么会跳转到登录页面。
4:用户在登录页面填写相应信息,然后通过post方式提交到SSO Server中。
5:SSO Server会校验用户信息(我为了快,我的校验方式就是要用户名为:cloud,同时密码为:cloud),同时在cookie中放username。
6:将生成ticket和username放到JVMCache中,在实际项目应该放到Memcached中,它的用处等下分析。
7,8:就是在用户访问OA系统的URL基础上加上了一个ticket参数,这样跳转到OA系统。
(此时进入OA系统时,filter发现URL是带ticket的,则filter会根据带过来的ticket并通过HttpClient的形式去 调用SSO Server中的TicektServlet,这样就会返回用户名,其实这个用户名就是从JVMCache拿到的,同时马上将这个ticket从 JVMCache中移除,这样保证一个ticket只会用一次,然后把返回的用户名放到session中)
9:session中有了用户名,说明用户登录成功了,则会去本应该返问的servlet。
10,11:将OA系统返回的视图给用户。
第二过程,用户已经登录成功了,但要访问另一个系统,如图:
1:用户通过URL访问PRO系统。
2:在PRO系统中的filter发现这个URL没有ticket,此时就会跳转到SSO Server。此时,由于用户登录了,所以cookie中有相应的信息(例如用户名),此时SSO Server中的filter会生成一个ticket。
3:将生成的ticket和username放到JVMCache中。
4:就是在用户访问PRO系统的URL基础上加上了一个ticket参数,这样跳转到PRO系统。
(此时进入PRO系统时,filter发现URL是带ticket的,则filter会根据带过来的ticket并通过HttpClient的形式 去调用SSO Server中的TicektServlet,这样就会返回用户名,其实这个用户名就是从JVMCache拿到的,同时马上将这个ticket从 JVMCache中移除,这样保证一个ticket只会用一次,然后把返回的用户名放到session中)
5:session中有了用户名,说明用户登录成功了,则会去本应该返问的servlet。
5,7:将PRO系统返回的视图给用户。
关键代码
先看SSO Server工程中的代码:
pom.xml
(注意:端口为8081)
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <groupId>com.cloud.sso.server</groupId>
- <artifactId>sso-server</artifactId>
- <packaging>war</packaging>
- <version>0.0.1-SNAPSHOT</version>
- <name>sso-server Maven Webapp</name>
- <url>http://maven.apache.org</url>
- <dependencies>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>servlet-api</artifactId>
- <version>2.5</version>
- <scope>provided</scope>
- </dependency>
- </dependencies>
- <build>
- <finalName>sso-server</finalName>
- <plugins>
- <plugin>
- <groupId>org.mortbay.jetty</groupId>
- <artifactId>jetty-maven-plugin</artifactId>
- <version>8.1.9.v20130131</version>
- <configuration>
- <stopKey>stop</stopKey>
- <stopPort>6000</stopPort>
- <webAppConfig>
- <contextPath>/sso</contextPath>
- </webAppConfig>
- <scanIntervalSeconds>4</scanIntervalSeconds>
- <connectors>
- <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
- <port>8081</port>
- <maxIdleTime>60000</maxIdleTime>
- </connector>
- </connectors>
- </configuration>
- </plugin>
- </plugins>
- </build>
- </project>
SSO Server中的filter
SSOServerFilter.java
- package com.cloud.sso.server.filter;
- import java.io.IOException;
- import javax.servlet.Filter;
- import javax.servlet.FilterChain;
- import javax.servlet.FilterConfig;
- import javax.servlet.ServletException;
- import javax.servlet.ServletRequest;
- import javax.servlet.ServletResponse;
- import javax.servlet.http.Cookie;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.cloud.sso.server.JVMCache;
- public class SSOServerFilter implements Filter {
- @Override
- public void destroy() {
- }
- @Override
- public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
- HttpServletRequest request = (HttpServletRequest) servletRequest;
- HttpServletResponse response = (HttpServletResponse) servletResponse;
- String service = request.getParameter("service");
- String ticket = request.getParameter("ticket");
- Cookie[] cookies = request.getCookies();
- String username = "";
- if (null != cookies) {
- for (Cookie cookie : cookies) {
- if ("sso".equals(cookie.getName())) {
- username = cookie.getValue();
- break;
- }
- }
- }
- if (null == service && null != ticket) {
- filterChain.doFilter(servletRequest, servletResponse);
- return;
- }
- if (null != username && !"".equals(username)) {
- long time = System.currentTimeMillis();
- String timeString = username + time;
- JVMCache.TICKET_AND_NAME.put(timeString, username);
- StringBuilder url = new StringBuilder();
- url.append(service);
- if (0 <= service.indexOf("?")) {
- url.append("&");
- } else {
- url.append("?");
- }
- url.append("ticket=").append(timeString);
- response.sendRedirect(url.toString());
- } else {
- filterChain.doFilter(servletRequest, servletResponse);
- }
- }
- @Override
- public void init(FilterConfig arg0) throws ServletException {
- }
- }
两个servlet:
LoginServlet.java
- package com.cloud.sso.server.servlet;
- import java.io.IOException;
- import javax.servlet.ServletException;
- import javax.servlet.http.Cookie;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.cloud.sso.server.JVMCache;
- public class LoginServlet extends HttpServlet {
- private static final long serialVersionUID = -3170191388656385924L;
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- this.doPost(request, response);
- }
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- String username = request.getParameter("username");
- String password = request.getParameter("password");
- String service = request.getParameter("service");
- if ("cloud".equals(username) && "cloud".equals(password)) {
- Cookie cookie = new Cookie("sso", username);
- cookie.setPath("/");
- response.addCookie(cookie);
- long time = System.currentTimeMillis();
- String timeString = username + time;
- JVMCache.TICKET_AND_NAME.put(timeString, username);
- if (null != service) {
- StringBuilder url = new StringBuilder();
- url.append(service);
- if (0 <= service.indexOf("?")) {
- url.append("&");
- } else {
- url.append("?");
- }
- url.append("ticket=").append(timeString);
- response.sendRedirect(url.toString());
- } else {
- response.sendRedirect("/sso/index.jsp");
- }
- } else {
- response.sendRedirect("/sso/index.jsp?service=" + service);
- }
- }
- }
TicketServlet.java
- package com.cloud.sso.server.servlet;
- import java.io.IOException;
- import java.io.PrintWriter;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import com.cloud.sso.server.JVMCache;
- public class TicketServlet extends HttpServlet {
- private static final long serialVersionUID = 5964206637772848290L;
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- super.doGet(request, response);
- }
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- String ticket = request.getParameter("ticket");
- String username = JVMCache.TICKET_AND_NAME.get(ticket);
- JVMCache.TICKET_AND_NAME.remove(ticket);
- PrintWriter writer = response.getWriter();
- writer.write(username);
- }
- }
JVMCache.java
- package com.cloud.sso.server;
- import java.util.HashMap;
- import java.util.Map;
- public class JVMCache {
- public static Map<String, String> TICKET_AND_NAME = new HashMap<String, String>();
- }
web.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- <filter>
- <filter-name>ssoServerFilter</filter-name>
- <filter-class>com.cloud.sso.server.filter.SSOServerFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>ssoServerFilter</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <servlet>
- <servlet-name>login</servlet-name>
- <servlet-class>com.cloud.sso.server.servlet.LoginServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>login</servlet-name>
- <url-pattern>/user/login</url-pattern>
- </servlet-mapping>
- <servlet>
- <servlet-name>ticket</servlet-name>
- <servlet-class>com.cloud.sso.server.servlet.TicketServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>ticket</servlet-name>
- <url-pattern>/ticket</url-pattern>
- </servlet-mapping>
- </web-app>
下面是OA系统中的代码:
pom.xml
(注意:端口为8082)
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <groupId>com.cloud.sso.oa</groupId>
- <artifactId>sso-oa</artifactId>
- <packaging>war</packaging>
- <version>0.0.1-SNAPSHOT</version>
- <name>sso-oa Maven Webapp</name>
- <url>http://maven.apache.org</url>
- <dependencies>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>servlet-api</artifactId>
- <version>2.5</version>
- <scope>provided</scope>
- </dependency>
- <dependency>
- <groupId>commons-httpclient</groupId>
- <artifactId>commons-httpclient</artifactId>
- <version>3.1</version>
- </dependency>
- </dependencies>
- <build>
- <finalName>sso-oa</finalName>
- <plugins>
- <plugin>
- <groupId>org.mortbay.jetty</groupId>
- <artifactId>jetty-maven-plugin</artifactId>
- <version>8.1.9.v20130131</version>
- <configuration>
- <stopKey>stop</stopKey>
- <stopPort>6000</stopPort>
- <webAppConfig>
- <contextPath>/oa</contextPath>
- </webAppConfig>
- <scanIntervalSeconds>4</scanIntervalSeconds>
- <connectors>
- <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
- <port>8082</port>
- <maxIdleTime>60000</maxIdleTime>
- </connector>
- </connectors>
- </configuration>
- </plugin>
- </plugins>
- </build>
- </project>
OA系统中的filter:
SSOClientFilter.java
- package com.cloud.sso.oa.filter;
- import java.io.IOException;
- import java.net.URLEncoder;
- import javax.servlet.Filter;
- import javax.servlet.FilterChain;
- import javax.servlet.FilterConfig;
- import javax.servlet.ServletException;
- import javax.servlet.ServletRequest;
- import javax.servlet.ServletResponse;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import javax.servlet.http.HttpSession;
- import org.apache.commons.httpclient.HttpClient;
- import org.apache.commons.httpclient.methods.PostMethod;
- public class SSOClientFilter implements Filter {
- @Override
- public void destroy() {
- }
- @Override
- public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
- HttpServletRequest request = (HttpServletRequest) servletRequest;
- HttpServletResponse response = (HttpServletResponse) servletResponse;
- HttpSession session = request.getSession();
- String username = (String) session.getAttribute("username");
- String ticket = request.getParameter("ticket");
- String url = URLEncoder.encode(request.getRequestURL().toString(), "UTF-8");
- if (null == username) {
- if (null != ticket && !"".equals(ticket)) {
- PostMethod postMethod = new PostMethod("http://localhost:8081/sso/ticket");
- postMethod.addParameter("ticket", ticket);
- HttpClient httpClient = new HttpClient();
- try {
- httpClient.executeMethod(postMethod);
- username = postMethod.getResponseBodyAsString();
- postMethod.releaseConnection();
- } catch (Exception e) {
- e.printStackTrace();
- }
- if (null != username && !"".equals(username)) {
- session.setAttribute("username", username);
- filterChain.doFilter(request, response);
- } else {
- response.sendRedirect("http://localhost:8081/sso/index.jsp?service=" + url);
- }
- } else {
- response.sendRedirect("http://localhost:8081/sso/index.jsp?service=" + url);
- }
- } else {
- filterChain.doFilter(request, response);
- }
- }
- @Override
- public void init(FilterConfig arg0) throws ServletException {
- }
- }
OAServlet.java
- package com.cloud.sso.oa.servlet;
- import java.io.IOException;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- public class OAServlet extends HttpServlet {
- private static final long serialVersionUID = 3615122544373006252L;
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- request.getRequestDispatcher("/WEB-INF/jsp/welcome.jsp").forward(request, response);
- }
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- this.doGet(request, response);
- }
- }
web.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- <filter>
- <filter-name>ssoClientFilter</filter-name>
- <filter-class>com.cloud.sso.oa.filter.SSOClientFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>ssoClientFilter</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <servlet>
- <servlet-name>list</servlet-name>
- <servlet-class>com.cloud.sso.oa.servlet.OAServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>list</servlet-name>
- <url-pattern>/list</url-pattern>
- </servlet-mapping>
- </web-app>
下面是PRO系统的代码:
pom.xml
(注意:端口为8083)
- <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
- <modelVersion>4.0.0</modelVersion>
- <groupId>com.cloud.sso.pro</groupId>
- <artifactId>sso-pro</artifactId>
- <packaging>war</packaging>
- <version>0.0.1-SNAPSHOT</version>
- <name>sso-pro Maven Webapp</name>
- <url>http://maven.apache.org</url>
- <dependencies>
- <dependency>
- <groupId>javax.servlet</groupId>
- <artifactId>servlet-api</artifactId>
- <version>2.5</version>
- <scope>provided</scope>
- </dependency>
- <dependency>
- <groupId>commons-httpclient</groupId>
- <artifactId>commons-httpclient</artifactId>
- <version>3.1</version>
- </dependency>
- </dependencies>
- <build>
- <finalName>sso-pro</finalName>
- <plugins>
- <plugin>
- <groupId>org.mortbay.jetty</groupId>
- <artifactId>jetty-maven-plugin</artifactId>
- <version>8.1.9.v20130131</version>
- <configuration>
- <stopKey>stop</stopKey>
- <stopPort>6000</stopPort>
- <webAppConfig>
- <contextPath>/pro</contextPath>
- </webAppConfig>
- <scanIntervalSeconds>4</scanIntervalSeconds>
- <connectors>
- <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
- <port>8083</port>
- <maxIdleTime>60000</maxIdleTime>
- </connector>
- </connectors>
- </configuration>
- </plugin>
- </plugins>
- </build>
- </project>
PRO系统中的filter
SSOClientFilter.java
- package com.cloud.sso.pro.filter;
- import java.io.IOException;
- import java.net.URLEncoder;
- import javax.servlet.Filter;
- import javax.servlet.FilterChain;
- import javax.servlet.FilterConfig;
- import javax.servlet.ServletException;
- import javax.servlet.ServletRequest;
- import javax.servlet.ServletResponse;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import javax.servlet.http.HttpSession;
- import org.apache.commons.httpclient.HttpClient;
- import org.apache.commons.httpclient.methods.PostMethod;
- public class SSOClientFilter implements Filter {
- @Override
- public void destroy() {
- }
- @Override
- public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
- HttpServletRequest request = (HttpServletRequest) servletRequest;
- HttpServletResponse response = (HttpServletResponse) servletResponse;
- HttpSession session = request.getSession();
- String username = (String) session.getAttribute("username");
- String ticket = request.getParameter("ticket");
- String url = URLEncoder.encode(request.getRequestURL().toString(), "UTF-8");
- if (null == username) {
- if (null != ticket && !"".equals(ticket)) {
- PostMethod postMethod = new PostMethod("http://localhost:8081/sso/ticket");
- postMethod.addParameter("ticket", ticket);
- HttpClient httpClient = new HttpClient();
- try {
- httpClient.executeMethod(postMethod);
- username = postMethod.getResponseBodyAsString();
- postMethod.releaseConnection();
- } catch (Exception e) {
- e.printStackTrace();
- }
- if (null != username && !"".equals(username)) {
- session.setAttribute("username", username);
- filterChain.doFilter(request, response);
- } else {
- response.sendRedirect("http://localhost:8081/sso/index.jsp?service=" + url);
- }
- } else {
- response.sendRedirect("http://localhost:8081/sso/index.jsp?service=" + url);
- }
- } else {
- filterChain.doFilter(request, response);
- }
- }
- @Override
- public void init(FilterConfig arg0) throws ServletException {
- }
- }
ProServlet.java
- package com.cloud.sso.pro.servlet;
- import java.io.IOException;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- public class ProServlet extends HttpServlet {
- private static final long serialVersionUID = -1334093914490423930L;
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- request.getRequestDispatcher("/WEB-INF/jsp/welcome.jsp").forward(request, response);
- }
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- super.doPost(request, response);
- }
- }
web.xml
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- <filter>
- <filter-name>ssoClientFilter</filter-name>
- <filter-class>com.cloud.sso.pro.filter.SSOClientFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>ssoClientFilter</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <servlet>
- <servlet-name>list</servlet-name>
- <servlet-class>com.cloud.sso.pro.servlet.ProServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>list</servlet-name>
- <url-pattern>/list</url-pattern>
- </servlet-mapping>
- </web-app>
运行结果:
1:分别启动这三个工程。
2:访问OA系统,URL:http://localhost:8082/oa/list
3:这样到登录页面,如图:
4:用户名为:cloud,密码为:cloud,点击登录则会显示,如图:
5:然后去进入PRO系统,URL:http://localhost:8083/pro/list,则就不需要登录了,直接进入,如图:
转载至:http://09094224.iteye.com/blog/2024708
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SSO(Single Sign-On)单点登录是一种网络应用的认证技术,它允许用户在一个系统或应用中登录后,无需再次输入凭证即可访问其他关联的系统或应用。这大大提升了用户体验,减少了用户记忆多个密码的负担,同时也有助...
SSO(Single Sign-On)单点登录是一种身份验证机制,允许用户在一次登录后,就能访问多个相互关联的应用系统,而无需再次进行身份验证。在Java中实现SSO,我们可以利用Spring Boot框架的强大功能,它提供了丰富的...
单点登录(Single Sign-On,简称SSO)是一种网络身份验证机制,允许用户在一个系统或应用中登录后,无需再次输入凭证即可访问其他相互信任的系统或应用。它简化了用户管理和提升了用户体验,同时减少了密码管理的...
本资源“Java-spring cloud alibaba 微服务单点登录及组件配置学习源码”是专为初学者设计的,旨在帮助他们快速理解和实践微服务中的单点登录(SSO)机制,以及如何配置相关组件。 首先,让我们深入了解Spring ...
单点登录(Single Sign-On,简称SSO)是一种网络访问控制机制,允许用户在一个系统上进行身份验证后,无需再次登录即可访问其他相互信任的系统。这种机制极大地提高了用户体验,减少了用户记忆多个密码的负担,同时...
在这个自己动手写的用户管理程序中,我们可以看到作者已经包含了完整的说明和源代码,这将为我们理解和学习提供极大的便利。...在实际应用中,还可以进一步扩展,如集成社交登录、实现单点登录(SSO)等高级功能。
SSO(Single Sign-On)单点登录是一种身份验证机制,允许用户在一次登录后访问多个相互关联的应用系统,而无需再次进行身份验证。这个压缩包包含了一个完整的SSO示例,可以直接运行,对于理解SSO的工作原理和实现...
单点登录(Single Sign-On, SSO)是一种网络身份验证机制,允许用户在一次登录后访问多个相互关联的应用系统,而无需再次输入凭证。CAS(Central Authentication Service)是实现SSO的一种常用开源框架。OAuth2.0则...
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