代码更新

src/main/java/cn/hellohao/utils/Base64ToMultipartFile.java

@@ -0,0 +1,98 @@
+package cn.hellohao.utils;
+
+import org.springframework.web.multipart.MultipartFile;
+import sun.misc.BASE64Decoder;
+
+import java.io.*;
+
+/**
+ * base64转为multipartFile工具类
+ * base64Convert
+ */
+
+public class Base64ToMultipartFile implements MultipartFile {
+    private final byte[] imgContent;
+    private final String header;
+
+
+
+    public Base64ToMultipartFile (byte[] imgContent, String header) {
+        this.imgContent = imgContent;
+        this.header = header.split(";")[0];
+    }
+
+    @Override
+    public String getName() {
+        return System.currentTimeMillis() + Math.random() + "." + header.split("/")[1];
+    }
+
+    @Override
+    public String getOriginalFilename() {
+        return System.currentTimeMillis() + (int) Math.random() * 10000 + "." + header.split("/")[1];
+    }
+
+    @Override
+    public String getContentType() {
+        return header.split(":")[1];
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return imgContent == null || imgContent.length == 0;
+    }
+
+    @Override
+    public long getSize() {
+        return imgContent.length;
+    }
+
+    @Override
+    public byte[] getBytes() throws IOException {
+        return imgContent;
+    }
+
+    @Override
+    public InputStream getInputStream() throws IOException {
+       ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(imgContent);
+		// 关闭流，不然文件会一直占用资源，无法对其操作
+		byteArrayInputStream.close();
+		return byteArrayInputStream;
+    }
+
+    @Override
+    public void transferTo(File dest) throws IOException, IllegalStateException {
+      	FileOutputStream fileOutputStream = new FileOutputStream(dest);
+		fileOutputStream.write(imgContent);
+		// 关闭流，不然文件会一直占用资源，无法对其操作
+		fileOutputStream.close();
+    }
+
+    /**
+     * base64转multipartFile
+     *
+     * @param base64
+     * @return
+     */
+    public static MultipartFile base64Convert(String base64) {
+        String[] baseStrs = base64.split(",");
+
+        BASE64Decoder decoder = new BASE64Decoder();
+        byte[] b = new byte[0];
+        try {
+            b = decoder.decodeBuffer(baseStrs[1]);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        for (int i = 0; i < b.length; ++i) {
+            if (b[i] < 0) {
+                b[i] += 256;
+            }
+        }
+        return new Base64ToMultipartFile (b, baseStrs[0]);
+    }
+
+
+
+
+}
+