前端微信跳转页面的extData，部分编码转义问题处理

src/main/java/cn/quantgroup/xyqb/controller/external/WeChatController.java

@@ -38,8 +38,10 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
@@ -177,6 +179,38 @@ public class WeChatController implements IBaseController {
         return builder.toString();
     }
 
+    public static void main(String[] args) {
+        try {
+            //String extData = "eyJjdXN0b21yZWRpcmVjdCI6Imh0dHBzOi8vcGFzc3BvcnQucS1ncC5jb20vbG9naW4%2FcmVnaXN0ZXJGcm9tPSUyMDEmY2hhbm5lbElkPTEmaXNXZWNoYXQ9dHJ1ZSZvcGVuSWQ9b1RRR29zeFVWVHRuRldpaWhmbk5FbnExQmxRYyIsInJlZGlyZWN0IjoicmVkaXJlY3QiLCJyZWdpc3RlckZyb20iOjEsInByb3RvY29sIjoiaHR0cHM6In0%3D";
+            String str = "eyJjdXN0b21yZWRpcmVjdCI6Imh0dHA6Ly9wYXNzcG9ydC54eXFiLmNvbS9sb2dpbj9rZXk9eHlxYiZ0YXJnZXQ9Y2FzaFRhcmdldDQmcmVkaXJlY3RVUkw9aHR0cCUzQSUyRiUyRmg1Lnh5cWIuY29tJTJGdXNlciUyRmhvbWUlM0ZyZWdpc3RlckZyb20lM0QxOTgmb3JpZ2luRnJvbT13eD9yZWdpc3RlckZyb209JTIwMSZjaGFubmVsSWQ9MSZpc1dlY2hhdD10cnVlJm9wZW5JZD1vVFFHb3M5a09ocjBpZTdLd0NtaWtqazluN1JVP3JlZ2lzdGVyRnJvbT0lMjAxJmNoYW5uZWxJZD0xJmlzV2VjaGF0PXRydWUmb3BlbklkPW9UUUdvczlrT2hyMGllN0t3Q21pa2prOW43UlU%2FcmVnaXN0ZXJGcm9tPSUyMDEmY2hhbm5lbElkPTEmaXNXZWNoYXQ9dHJ1ZSZvcGVuSWQ9b1RRR29zOWtPaHIwaWU3S3dDbWlrams5bjdSVSIsInJlZGlyZWN0IjoicmVkaXJlY3QiLCJyZWdpc3RlckZyb20iOjEsInByb3RvY29sIjoiaHR0cDoifQ%3D%3D";
+            System.out.println(str);
+            //String str = "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"; // %2F %3D
+            String str1 = "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";
+
+            // // %2F %3D
+            str = str.replace("%2F", "/");
+            str = str.replace("%3D", "=");
+            System.out.println(str);
+            System.out.println(str1);
+            System.out.println(str.equals(str1));
+            String extData = new String(Base64.decodeBase64(str), StandardCharsets.UTF_8);
+            //extData = new String(Base64.decodeBase64(extData));
+            System.out.println(extData);
+
+            byte[] decodedBytes = Base64.decodeBase64(str.getBytes(StandardCharsets.UTF_8));
+            String decodedString = new String(decodedBytes, StandardCharsets.UTF_8);
+
+            System.out.println(decodedString);
+
+
+            byte[] decode = java.util.Base64.getDecoder().decode(str);
+            String decodedString2 = new String(decode, StandardCharsets.UTF_8);
+            System.out.println(decodedString2);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
     /**
      * 前端微信跳转页面，通过extdata
      *
@@ -199,6 +233,14 @@ public class WeChatController implements IBaseController {
         }
 
         try {
+
+            //有问题的编码
+            //String str = "eyJjdXN0b21yZWRpcmVjdCI6Imh0dHA6Ly9wYXNzcG9ydC54eXFiLmNvbS9sb2dpbj9rZXk9eHlxYiZ0YXJnZXQ9Y2FzaFRhcmdldDQmcmVkaXJlY3RVUkw9aHR0cCUzQSUyRiUyRmg1Lnh5cWIuY29tJTJGdXNlciUyRmhvbWUlM0ZyZWdpc3RlckZyb20lM0QxOTgmb3JpZ2luRnJvbT13eD9yZWdpc3RlckZyb209JTIwMSZjaGFubmVsSWQ9MSZpc1dlY2hhdD10cnVlJm9wZW5JZD1vVFFHb3M5a09ocjBpZTdLd0NtaWtqazluN1JVP3JlZ2lzdGVyRnJvbT0lMjAxJmNoYW5uZWxJZD0xJmlzV2VjaGF0PXRydWUmb3BlbklkPW9UUUdvczlrT2hyMGllN0t3Q21pa2prOW43UlU%2FcmVnaXN0ZXJGcm9tPSUyMDEmY2hhbm5lbElkPTEmaXNXZWNoYXQ9dHJ1ZSZvcGVuSWQ9b1RRR29zOWtPaHIwaWU3S3dDbWlrams5bjdSVSIsInJlZGlyZWN0IjoicmVkaXJlY3QiLCJyZWdpc3RlckZyb20iOjEsInByb3RvY29sIjoiaHR0cDoifQ%3D%3D";
+            //预期的编码
+            //String str1 = "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";
+
+            //替换编码问题
+            extData = extData.replace("%2F", "/").replace("%3D", "=");
             extData = new String(Base64.decodeBase64(extData), "UTF-8");
         } catch (Exception ex) {
             extData = "";