添加获取文件内容的base64接口

4dkankan-common/src/main/java/com/fdkankan/common/util/FileUtils.java

@@ -7,10 +7,7 @@ import lombok.extern.slf4j.Slf4j;
 
 import java.awt.image.BufferedImage;
 import java.io.*;
-import java.net.HttpURLConnection;
-import java.net.InetAddress;
-import java.net.URL;
-import java.net.URLDecoder;
+import java.net.*;
 import java.util.*;
 
 import org.apache.tools.zip.ZipEntry;
@@ -23,6 +20,7 @@ import org.bytedeco.javacv.Java2DFrameConverter;
 import org.bytedeco.javacv.OpenCVFrameConverter;
 import org.springframework.util.ResourceUtils;
 import sun.misc.BASE64Decoder;
+import sun.misc.BASE64Encoder;
 
 import javax.imageio.ImageIO;
 
@@ -413,6 +411,22 @@ public class FileUtils {
         return true;
     }
 
+    public static String getBase64ContentFromUrl(String urlStr) throws IOException {
+        URL url = new URL(urlStr);
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        // 设置超时间为3秒
+        conn.setConnectTimeout(3 * 1000);
+        // 防止屏蔽程序抓取而返回403错误
+        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
+
+        // 得到输入流
+        InputStream inputStream = conn.getInputStream();
+        // 获取自己数组
+        byte[] data = readInputStream(inputStream);
+
+        return new BASE64Encoder().encode(data);
+    }
+
     /**
      * 从输入流中获取字节数组
      *

4dkankan-web/src/main/java/com/fdkankan/web/controller/OpenApiController.java

@@ -0,0 +1,21 @@
+package com.fdkankan.web.controller;
+
+import com.fdkankan.common.util.FileUtils;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.io.IOException;
+
+@RestController
+@RequestMapping("/openapi/file")
+public class OpenApiController {
+
+    private final String base64Prefix= "data:image/jpg;base64,";
+
+    @PostMapping(value = "/getBase64")
+    public String getBase64(String fileUrl) throws IOException {
+        return base64Prefix.concat(FileUtils.getBase64ContentFromUrl(fileUrl));
+    }
+}