use UTF-8

Author: mrzhang

router-anno-compiler/src/main/java/com/luojilab/router/compiler/utils/FileUtils.java

@@ -40,7 +40,7 @@ public static void writeStringToFile(String fileName, String content, boolean ap
         BufferedWriter out = null;
         try {
             out = new BufferedWriter(new OutputStreamWriter(
-                    new FileOutputStream(fileName, append)));
+                    new FileOutputStream(fileName, append), "UTF-8"));
             out.write(content);
         } catch (Exception e) {
             e.printStackTrace();