diff --git a/src/main/java/org/jcnc/jnotepad/tool/JsonUtil.java b/src/main/java/org/jcnc/jnotepad/tool/JsonUtil.java
index 1119123..59f920e 100644
--- a/src/main/java/org/jcnc/jnotepad/tool/JsonUtil.java
+++ b/src/main/java/org/jcnc/jnotepad/tool/JsonUtil.java
@@ -1,10 +1,15 @@
 package org.jcnc.jnotepad.tool;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.PrettyPrinter;
+import com.fasterxml.jackson.core.util.DefaultIndenter;
+import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import org.jcnc.jnotepad.exception.AppException;
 
+import static com.fasterxml.jackson.core.util.DefaultIndenter.SYS_LF;
+
 /**
  * jackson解析器的facade类，主要提供objectMapper对象
  *
@@ -14,7 +19,16 @@ public class JsonUtil {
     private JsonUtil() {
     }
 
-    public static final ObjectMapper OBJECT_MAPPER = new ObjectMapper().enable(SerializationFeature.INDENT_OUTPUT);
+    public static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+    static {
+        OBJECT_MAPPER.enable(SerializationFeature.INDENT_OUTPUT);
+        DefaultPrettyPrinter prettyPrinter = new DefaultPrettyPrinter();
+        DefaultIndenter di = new DefaultIndenter("    ", SYS_LF);
+        prettyPrinter.indentArraysWith(di);
+        prettyPrinter.indentObjectsWith(di);
+        OBJECT_MAPPER.setDefaultPrettyPrinter(prettyPrinter);
+    }
 
     public static String toJsonString(Object o) {
         try {