feat: 添加免费用户字段并优化请求体处理

- 在AppletUser类中添加freeUser字段以支持免费用户标识
- 移除pom.xml中过时的Java 9编译配置
- 修改AppletApiTTSController中的请求体读取方式，使用缓冲区提高处理大请求体的性能

jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/common/system/vo/AppletUser.java

@@ -83,6 +83,8 @@ public class AppletUser implements Serializable {
 
     private String unionId;//同平id
 
+    private String freeUser;//免费用户
+
     /**
      * 手机号
      */

jeecg-boot/jeecg-boot-module/jeecgboot-boot-applet/pom.xml

@@ -3,18 +3,18 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>jeecgboot-boot-applet</artifactId>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>9</source>
-                    <target>9</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
+<!--    <build>-->
+<!--        <plugins>-->
+<!--            <plugin>-->
+<!--                <groupId>org.apache.maven.plugins</groupId>-->
+<!--                <artifactId>maven-compiler-plugin</artifactId>-->
+<!--                <configuration>-->
+<!--                    <source>8</source>-->
+<!--                    <target>8</target>-->
+<!--                </configuration>-->
+<!--            </plugin>-->
+<!--        </plugins>-->
+<!--    </build>-->
 
     <parent>
         <artifactId>jeecg-boot-module</artifactId>

jeecg-boot/jeecg-boot-module/jeecgboot-boot-applet/src/main/java/org/jeecg/modules/applet/controller/AppletApiTTSController.java

@@ -134,7 +134,13 @@ public class AppletApiTTSController {
             
             // 直接从 InputStream 读取原始字节，避免 Spring 的参数解析
             try (java.io.InputStream is = request.getInputStream()) {
-                byte[] bytes = is.readAllBytes();
+                java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();
+                byte[] buffer = new byte[1024];
+                int length;
+                while ((length = is.read(buffer)) != -1) {
+                    baos.write(buffer, 0, length);
+                }
+                byte[] bytes = baos.toByteArray();
                 raw = new String(bytes, java.nio.charset.StandardCharsets.UTF_8);
                 log.info("原始请求体长度: {} 字节", bytes.length);
             }