QRC

src/main/java/com/lovenav/utils/QRCodeUtil.java

@@ -20,6 +20,7 @@ import java.net.HttpURLConnection;
 import java.net.URL;
 import java.text.SimpleDateFormat;
 import java.util.*;
+import java.util.regex.Pattern;
 
 @Component
 @Service
@@ -431,7 +432,56 @@ public class QRCodeUtil {
         return (serverPath +"/" + fileName);
     }
 
+
+
+    // 对字节数组字符串进行Base64解码并生成图片
+    //imgFilePath 待保存的本地路径
+    public static String GenerateImage(String base64Str, String imgFilePath) {
+        if (base64Str == null) // 图像数据为空
+            return null;
+        Base64.Decoder decoder = Base64.getDecoder();
+        try {
+            // Base64解码
+            byte[] bytes = decoder.decode(base64Str);
+            for (int i = 0; i < bytes.length; ++i) {
+                if (bytes[i] < 0) {// 调整异常数据
+                    bytes[i] += 256;
+                }
+            }
+
+            //设置图片名称，这个随意
+            String date = new Random().nextInt(99999999)+".jpg";
+            String fileName = date ;
+
+            // 生成jpg图片
+            OutputStream out = new FileOutputStream(imgFilePath +"/" + fileName);
+            out.write(bytes);
+            out.flush();
+            out.close();
+            return (imgFilePath +"/" + fileName);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public static boolean isBase64(String url){
+        String reg = "[a-zA-z]+://[^\\s]*";
+        boolean isMatch = Pattern.matches(reg, url);
+        if(isMatch){
+            return isMatch;
+        }
+        return isMatch;
+    }
+
+    public static String delete_profix(String base64){
+        String delete = "data:image/jpg;base64,";
+        String Base64 = base64;
+        return(base64.replace(delete,""));
+    }
+
+
     public static void main(String[] args) throws Exception {
+
 //        String text = "https://www.baidu.com";  //这里设置自定义网站url
 //        String logoPath ="src/main/resources/static/logo/NAV.png";
 //        String destPath = "src/main/resources/static/qr";