java不同版本特性示例

demo1/pom.xml

@@ -8,4 +8,27 @@
     <name>demo1</name>
     <description>从0到1实现一个web服务器</description>
 
+    <properties>
+        <java.version>21</java.version>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <compilerArgs>
+                        <!-- 开启预览功能：STR模板引擎-->
+                        <arg>--enable-preview</arg>
+                    </compilerArgs>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>