feat: 支持多模态送检，支持设置运行环境

Author: liuyuzhe.316

volcengine-java-sdk-llmshield/src/main/java/com/volcengine/llmshield/ApiClient.java

@@ -98,6 +98,19 @@ public void Close() throws IOException {
         }
     }
 
+    /**
+     * 设置环境
+     * @param IsDev 是否为dev环境
+     * @return 无
+     */
+    public void SetServiceCode(boolean IsDev)  {
+        Sign.setServiceCode(IsDev);
+    }
+
+    public String GetServiceCode()  {
+        return Sign.getServiceCode();
+    }
+
     /**
      * 多模态、多轮对话审核
      *

volcengine-java-sdk-llmshield/src/main/java/com/volcengine/llmshield/MessageV2.java

@@ -2,6 +2,9 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.util.ArrayList;
+import java.util.List;
+
 // 消息结构
 public class MessageV2 {
     @JsonProperty("Role")
@@ -13,13 +16,23 @@ public class MessageV2 {
     @JsonProperty("ContentType")
     private ContentTypeV2 contentType;  // 内容类型
 
+    @JsonProperty("MultiPart")
+    private List<MultiPart> multiPart;  // 多模态内容
+
     // 深拷贝构造方法
     public MessageV2(MessageV2 other) {
         // String是不可变类型，直接赋值即可
         this.role = other.role;
         this.content = other.content;
-
         this.contentType = other.contentType;
+
+        // List<multiPart>：新建List并对每个元素深拷贝
+        if (other.multiPart != null) {
+            this.multiPart = new ArrayList<>();
+            for (MultiPart contPart : other.multiPart) {
+                this.multiPart.add(new MultiPart(contPart)); // 假设MultiPart有深拷贝构造方法
+            }
+        }
     }
 
     // 无参构造方法（保留，用于JSON反序列化等场景）
@@ -48,4 +61,8 @@ public ContentTypeV2 getContentType() {
     public void setContentType(ContentTypeV2 contentType) {
         this.contentType = contentType;
     }
+
+    public List<MultiPart> getMultiPart() { return multiPart; }
+
+    public void setMultiPart(List<MultiPart> multiPart) { this.multiPart = multiPart; }
 }

volcengine-java-sdk-llmshield/src/main/java/com/volcengine/llmshield/MultiPart.java

@@ -0,0 +1,26 @@
+package com.volcengine.llmshield;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class MultiPart {
+    @JsonProperty("Content")
+    private String content;     // 内容文本或链接
+
+    @JsonProperty("ContentType")
+    private ContentTypeV2 contentType;  // 内容类型
+
+    // 深拷贝构造方法
+    public MultiPart(MultiPart other) {
+        // String是不可变类型，直接赋值即可
+        this.content = other.content;
+        this.contentType = other.contentType;
+    }
+
+    public String getContent() { return content; }
+
+    public void setContent(String content) { this.content = content; }
+
+    public ContentTypeV2 getContentType() { return contentType; }
+
+    public void setContentType(ContentTypeV2 contentType) { this.contentType = contentType; }
+}

volcengine-java-sdk-llmshield/src/main/java/com/volcengine/llmshield/Sign.java

@@ -34,14 +34,19 @@
  */
 public class Sign {
     // 常量定义
+    private static final String SERVICE_CODE_DEV = "llmshield_dev";
+    private static final String SERVICE_CODE_ONLINE = "llmshield";
+
     private static final String VERSION = "2025-08-31";
-    private static final String SERVICE = "llmshield";
     private static final BitSet URLENCODER = new BitSet(256);
     private static final String CONST_ENCODE = "0123456789ABCDEF";
     public static final Charset UTF_8 = StandardCharsets.UTF_8;
     // 默认 Content-Type（可根据实际需求调整，若请求体为 JSON 可改为 application/json）
     private static final String DEFAULT_CONTENT_TYPE = "application/json";
 
+    private static boolean isModified = false; //记录是否已修改过
+    private static String SERVICE = SERVICE_CODE_ONLINE;
+
     // 静态初始化 URL 编码允许的字符（复用原逻辑）
     static {
         int i;
@@ -62,6 +67,21 @@ public class Sign {
         URLENCODER.set('~');
     }
 
+    public static synchronized void setServiceCode(boolean IsDev) {
+        if (!isModified) {
+            if (IsDev) {
+                SERVICE = SERVICE_CODE_DEV;
+            } else {
+                SERVICE = SERVICE_CODE_ONLINE;
+            }
+            isModified = true;
+        }
+    }
+
+    public static String getServiceCode() {
+        return SERVICE;
+    }
+
     /**
      * 核心加签方法：为 HttpPost 请求添加火山引擎 API 签名
      *