diff --git a/z-utils/ChangeImageUrl.java b/z-utils/ChangeImageUrl.java
new file mode 100644
index 0000000..8dc34fe
--- /dev/null
+++ b/z-utils/ChangeImageUrl.java
@@ -0,0 +1,71 @@
+import java.io.*;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author : heibaiying
+ * @description : 转换本地图片为Github图片工具类
+ */
+public class ChangeImageUrl {
+
+    public static void main(String[] args) throws Exception {
+
+        if (args.length < 1) {
+            System.out.println("请传递路径");
+            return;
+        }
+
+        String dir = args[0];
+
+        String preUrl = "https://github.com/heibaiying/spring-samples-for-all/blob/master/pictures/";
+        String regex = "(!\\[(\\S*)]\\(D:\\\\spring-samples-for-all\\\\pictures\\\\(\\S*)\\)[^(</br>)]*?)";
+
+        List<String> filesList = getAllFile(dir, new ArrayList<>());
+        for (String filePath : filesList) {
+            changeImageUrl(filePath, preUrl, regex);
+        }
+        System.out.println("图片地址转换成功！");
+    }
+
+
+    private static void changeImageUrl(String filePath, String preUrl, String oldImageUrlRegex) throws IOException {
+
+        FileReader reader = new FileReader(filePath);
+        StringBuilder stringBuilder = new StringBuilder();
+        char[] chars = new char[1024 * 1024];
+        int read = 0;
+        while ((read = reader.read(chars)) != -1) {
+            stringBuilder.append(new String(chars, 0, read));
+        }
+        reader.close();
+        String content = stringBuilder.toString();
+        //github 居中方式 <div align="center"> <img src=""/> </div>
+        String newContent = content.replaceAll(oldImageUrlRegex,
+                String.format("<div align=\"center\"> <img src=\"%s$3\"/> </div>", preUrl));
+        FileWriter fileWriter = new FileWriter(new File(filePath));
+        fileWriter.write(newContent);
+        fileWriter.flush();
+
+    }
+
+    private static List<String> getAllFile(String dir, List<String> filesList) {
+        File file = new File(dir);
+        //如果是文件 则不遍历
+        if (file.isFile() && file.getName().endsWith(".md")) {
+            filesList.add(file.getAbsolutePath());
+        }
+        //如果是文件夹 则遍历下面的所有文件
+        File[] files = file.listFiles();
+        if (files != null) {
+            for (File f : files) {
+                if (f.isDirectory() && !f.getName().startsWith(".")) {
+                    getAllFile(f.getAbsolutePath(), filesList);
+                } else if (f.getName().endsWith(".md")) {
+                    filesList.add(f.getAbsolutePath());
+                }
+            }
+        }
+        return filesList;
+    }
+
+}
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