diff --git a/src/main/java/org/joychou/controller/PathTraversal.java b/src/main/java/org/joychou/controller/PathTraversal.java
index 1976b01b..510c5f5e 100644
--- a/src/main/java/org/joychou/controller/PathTraversal.java
+++ b/src/main/java/org/joychou/controller/PathTraversal.java
@@ -7,7 +7,9 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.io.BufferedReader;
 import java.io.File;
+import java.io.FileReader;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -23,7 +25,7 @@ public class PathTraversal {
      */
     @GetMapping("/path_traversal/vul")
     public String getImage(String filepath) throws IOException {
-        return getImgBase64(filepath);
+        return newFile(filepath);
     }
 
     @GetMapping("/path_traversal/sec")
@@ -34,7 +36,14 @@ public String getImageSec(String filepath) throws IOException {
         }
         return getImgBase64(filepath);
     }
-
+    public static String newFile(String text) {
+        try {
+            File f = new File(text);
+            return readFile(f);
+        } catch (Exception e) {
+            return e.getMessage();
+        }
+    }
     private String getImgBase64(String imgFile) throws IOException {
 
         logger.info("Working directory: " + System.getProperty("user.dir"));
@@ -53,4 +62,20 @@ public static void main(String[] argv) throws IOException {
         String aa = new String(Files.readAllBytes(Paths.get("pom.xml")), StandardCharsets.UTF_8);
         System.out.println(aa);
     }
+    private static String readFile(File file) {
+        try {
+            FileReader fileStream = new FileReader(file);
+            BufferedReader bufferedReader = new BufferedReader(fileStream);
+
+            String line = null;
+            StringBuilder sb = new StringBuilder();
+
+            while ((line = bufferedReader.readLine()) != null) {
+                sb.append(line).append("\n");
+            }
+            return sb.toString();
+        } catch (IOException e) {
+            return "file read failed: " + e;
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 66bdb978..fff382c1 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -1,5 +1,5 @@
 
-spring.datasource.url=jdbc:mysql://localhost:3306/java_sec_code?allowPublicKeyRetrieval=true&useSSL=false&serverTimezone=UTC
+spring.datasource.url=jdbc:mysql://j_mysql:3306/java_sec_code?allowPublicKeyRetrieval=true&useSSL=false&serverTimezone=UTC
 spring.datasource.username=root
 spring.datasource.password=woshishujukumima
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver