base64工具类

src/main/java/com/yx/face/boot/uitls/Base64Util.java

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+package com.yx.face.boot.uitls;
+
+/**
+ * @description:
+ * @ClassName Base64Util
+ * @Author WXG
+ * @Date 2021/12/2 14:06
+ */
+import sun.misc.BASE64Decoder;
+import sun.misc.BASE64Encoder;
+
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Base64 转换工具
+ */
+public class Base64Util {
+
+    /**
+     * byte数组 转换为 Base64字符串
+     */
+    public static String encode(byte[] data) {
+        return new BASE64Encoder().encode(data);
+    }
+
+    /**
+     * Base64字符串 转换为 byte数组
+     */
+    public static byte[] decode(String base64) {
+        try {
+            return new BASE64Decoder().decodeBuffer(base64);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return new byte[0];
+    }
+
+    /**
+     * 把文件内容编码为 Base64字符串, 只能编码小文件（例如文本、图片等）
+     */
+    public static String encodeFile(File file) throws Exception {
+        InputStream in = null;
+        ByteArrayOutputStream bytesOut = null;
+
+        try {
+            in = new FileInputStream(file);
+            bytesOut = new ByteArrayOutputStream((int) file.length());
+
+            byte[] buf = new byte[1024];
+            int len = -1;
+
+            while ((len = in.read(buf)) != -1) {
+                bytesOut.write(buf, 0, len);
+            }
+            bytesOut.flush();
+
+            return encode(bytesOut.toByteArray());
+
+        } finally {
+            close(in);
+            close(bytesOut);
+        }
+    }
+    /**
+     * 根据图片路径转为Base的字符串
+     */
+    public static String encodeFile(String filePath) throws Exception {
+        File file = new File(filePath);
+        return encodeFile(file);
+    }
+    /**
+     * 把 Base64字符串 转换为 byte数组, 保存到指定文件
+     */
+    public static void decodeFile(String base64, File file) throws Exception {
+        OutputStream fileOut = null;
+        try {
+            fileOut = new FileOutputStream(file);
+            fileOut.write(decode(base64));
+            fileOut.flush();
+        } finally {
+            close(fileOut);
+        }
+    }
+
+    private static void close(Closeable c) {
+        if (c != null) {
+            try {
+                c.close();
+            } catch (IOException e) {
+                // nothing
+            }
+        }
+    }
+
+}
+