diff --git a/pom.xml b/pom.xml
index bee7927..9e44196 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
                     <imageName>SecretChat</imageName>
                     <quickBuild>true</quickBuild>
                     <buildArgs>
-                        <arg>--gc=G1</arg>
+<!--                        <arg>&#45;&#45;gc=G1</arg>-->
                         <arg>-H:+ReportExceptionStackTraces</arg>
                     </buildArgs>
                     <metadataRepository>
@@ -53,15 +53,6 @@
                     </metadataRepository>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>21</source>
-                    <target>21</target>
-                    <compilerArgs>--enable-preview</compilerArgs>
-                </configuration>
-            </plugin>
         </plugins>
     </build>
 
diff --git a/src/main/java/com/demo/Message.java b/src/main/java/com/demo/Message.java
index 247f888..61721e4 100644
--- a/src/main/java/com/demo/Message.java
+++ b/src/main/java/com/demo/Message.java
@@ -2,8 +2,6 @@ package com.demo;
 
 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
 
-import static java.lang.StringTemplate.STR;
-
 public class Message {
     //表示前端与后端建立连接并发送聊天id
     public static final int INIT = 1;
@@ -24,6 +22,6 @@ public class Message {
     public static final int CONTENT = 30;
 
     public static TextWebSocketFrame pairDisconnected(){
-        return new TextWebSocketFrame(STR."{\"type\":\{Message.DISCONNECT}}");
+        return new TextWebSocketFrame("{\"type\":" + Message.DISCONNECT + "}");
     }
 }