GA/T 1400协议支持

src/main/java/com/ycwl/basic/utils/ImageUtils.java

@@ -0,0 +1,79 @@
+package com.ycwl.basic.utils;
+
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Base64;
+
+public class ImageUtils {
+    public static MultipartFile base64ToMultipartFile(String base64) {
+        String[] baseStrs = base64.split(",");
+        byte[] b;
+        b = Base64.getDecoder().decode(baseStrs[0]);
+        for (int i = 0; i < b.length; ++i) {
+            if (b[i] < 0) {
+                b[i] += 256;
+            }
+        }
+        return new Base64DecodedMultipartFile(b, baseStrs[0]);
+    }
+    public static class Base64DecodedMultipartFile implements MultipartFile {
+
+        private final byte[] imgContent;
+        private final String header;
+
+        public Base64DecodedMultipartFile(byte[] imgContent, String header) {
+            this.imgContent = imgContent;
+            this.header = header.split(";")[0];
+        }
+
+        @Override
+        public String getName() {
+            // TODO - implementation depends on your requirements
+            return System.currentTimeMillis() + Math.random() + "." + header.split("/")[1];
+        }
+
+        @Override
+        public String getOriginalFilename() {
+            // TODO - implementation depends on your requirements
+            return System.currentTimeMillis() + (int) Math.random() * 10000 + "." + header.split("/")[1];
+        }
+
+        @Override
+        public String getContentType() {
+            // TODO - implementation depends on your requirements
+            return header.split(":")[0];
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return imgContent == null || imgContent.length == 0;
+        }
+
+        @Override
+        public long getSize() {
+            return imgContent.length;
+        }
+
+        @Override
+        public byte[] getBytes() {
+            return imgContent;
+        }
+
+        @Override
+        public InputStream getInputStream() {
+            return new ByteArrayInputStream(imgContent);
+        }
+
+        @Override
+        public void transferTo(File dest) throws IOException, IllegalStateException {
+            new FileOutputStream(dest).write(imgContent);
+        }
+
+    }
+
+}