新增 SSO 平台中心模式示例，跳连接进入子系统

sa-token-demo/sa-token-demo-sso-server/src/main/java/com/pj/sso/HomeController.java

@@ -0,0 +1,43 @@
+package com.pj.sso;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import cn.dev33.satoken.context.SaHolder;
+import cn.dev33.satoken.stp.StpUtil;
+
+/**
+ * SSO 平台中心模式示例，跳连接进入子系统 
+ * 
+ * @author kong
+ * @since 2022-10-24
+ */
+@RestController
+public class HomeController {
+
+	/**
+	 * 平台化首页
+	 * @return
+	 */
+	@RequestMapping("/home")
+	public Object index() {
+		// 如果未登录，则先去登录
+		if(StpUtil.isLogin() == false) {
+			return SaHolder.getResponse().redirect("/sso/auth");
+		}
+		
+		// 拼接各个子系统的地址，格式形如：/sso/auth?redirect=${子系统首页}/sso/login?back=${子系统首页}
+		String link1 = "/sso/auth?redirect=http://sa-sso-client1.com:9001/sso/login?back=http://sa-sso-client1.com:9001/";
+		String link2 = "/sso/auth?redirect=http://sa-sso-client2.com:9001/sso/login?back=http://sa-sso-client2.com:9001/";
+		String link3 = "/sso/auth?redirect=http://sa-sso-client3.com:9001/sso/login?back=http://sa-sso-client3.com:9001/";
+
+		// 组织网页结构返回到前端 
+		String title = "<h2>SSO 平台首页</h2>";
+		String client1 = "<p><a href='" + link1 + "' target='_blank'> 进入Client1系统 </a></p>";
+		String client2 = "<p><a href='" + link2 + "' target='_blank'> 进入Client2系统 </a></p>";
+		String client3 = "<p><a href='" + link3 + "' target='_blank'> 进入Client3系统 </a></p>";
+		
+		return title + client1 + client2 + client3;
+	}
+	
+}