OSS中的image展示问题

plugin.xml

@@ -14,6 +14,7 @@
     ]]></change-notes>
     <extra-core>
         <LocaleFinder class="com.fr.plugin.file.submit.oss.OssLocaleFinder"/>
+        <FunctionDefineProvider class="com.fr.plugin.file.download.oss.OssFile2Image" name="OssFile2Image" description="将OSS中的文件以图片的形式展示到报表中。调用示例：OssFile2Image(key, bucket)。"/>
     </extra-core>
     <extra-decision>
         <HttpHandlerProvider class="com.fr.plugin.file.submit.oss.OssRequestHandler"/>

src/main/java/com/fr/plugin/file/download/oss/OssFile2Image.java

@@ -0,0 +1,43 @@
+package com.fr.plugin.file.download.oss;
+
+import com.aliyun.oss.OSSClient;
+import com.aliyun.oss.model.OSSObject;
+import com.fr.general.GeneralUtils;
+import com.fr.general.IOUtils;
+import com.fr.log.FineLoggerFactory;
+import com.fr.plugin.file.submit.oss.conf.FileSubmitOssServerConfig;
+import com.fr.script.AbstractFunction;
+import com.fr.stable.ArrayUtils;
+import com.fr.stable.Primitive;
+
+import javax.imageio.ImageIO;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+/**
+ * 将OSS中的文件已图片的方式展示到报表中来
+ */
+public class OssFile2Image extends AbstractFunction  {
+
+    @Override
+    public Object run(Object[] args) {
+        int len = ArrayUtils.getLength(args);
+        if (len < 2) {
+            return Primitive.ERROR_VALUE;
+        }
+        String key = GeneralUtils.objectToString(args[0]);
+        String bucket = GeneralUtils.objectToString(args[1]);
+        OSSClient ossClient = new OSSClient(
+                FileSubmitOssServerConfig.getInstance().getEndPoint(),
+                FileSubmitOssServerConfig.getInstance().getAccessKeyId(),
+                FileSubmitOssServerConfig.getInstance().getAccessKeySecret());
+        OSSObject object = ossClient.getObject(bucket, key);
+        byte[] bytes = IOUtils.inputStream2Bytes(object.getObjectContent());
+        try {
+            return ImageIO.read(new ByteArrayInputStream(bytes));
+        } catch (IOException e) {
+            FineLoggerFactory.getLogger().error(e.getMessage(), e);
+            return Primitive.ERROR_VALUE;
+        }
+    }
+}