check if or port is available

@@ -128,7 +128,7 @@ public class RouteController {
 
         CIMUserInfo cimUserInfo = userInfoCacheService.loadUserInfoByUserId(groupReqVO.getUserId());
 
-        LOGGER.info("下线用户[{}]", cimUserInfo.toString());
+        LOGGER.info("user [{}] offline!", cimUserInfo.toString());
         accountService.offLine(groupReqVO.getUserId());
 
         res.setCode(StatusEnum.SUCCESS.getCode());

+package com.crossoverjie.cim.route.kit;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+
+/**
+ * Function:
+ *
+ * @author crossoverJie
+ * Date: 2020-04-12 20:32
+ * @since JDK 1.8
+ */
+public class NetAddressIsReachable {
+
+    /**
+     * check ip and port
+     *
+     * @param address
+     * @param port
+     * @param timeout
+     * @return True if connection successful
+     */
+    public static boolean checkAddressReachable(String address, int port, int timeout) {
+        Socket socket = new Socket() ;
+        try {
+            socket.connect(new InetSocketAddress(address, port), timeout);
+            return true;
+        } catch (IOException exception) {
+            return false;
+        } finally {
+            try {
+                socket.close();
+            } catch (IOException e) {
+                return false ;
+            }
+        }
+    }
+}

+import com.crossoverjie.cim.route.kit.NetAddressIsReachable;
+import org.junit.Test;
+
+/**
+ * Function:
+ *
+ * @author crossoverJie
+ * Date: 2020-04-12 18:38
+ * @since JDK 1.8
+ */
+public class CommonTest {
+
+    @Test
+    public void test() {
+        boolean reachable = NetAddressIsReachable.checkAddressReachable("127.0.0.1", 11211, 1000);
+        System.out.println(reachable);
+    }
+
+
+
+}