diff --git a/src/main/java/cn/axzo/pokonyan/aop/RequestLog.java b/src/main/java/cn/axzo/pokonyan/aop/RequestLog.java
index 100bccf..7ba2590 100644
--- a/src/main/java/cn/axzo/pokonyan/aop/RequestLog.java
+++ b/src/main/java/cn/axzo/pokonyan/aop/RequestLog.java
@@ -9,6 +9,7 @@ import org.aspectj.lang.annotation.Around;
 import org.aspectj.lang.annotation.Aspect;
 import org.springframework.stereotype.Component;
 import org.springframework.util.StopWatch;
+import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.RestController;
 
 import javax.servlet.http.HttpServletRequest;
@@ -42,8 +43,15 @@ public class RequestLog {
         stopWatch.start();
         Object proceed = joinPoint.proceed();
         stopWatch.stop();
-        log.info("[response]返回记录： latency = {} responseParam = {}", stopWatch.getTotalTimeMillis(),
-                JSONUtil.toJsonStr(proceed).substring(0,1000));
+        log.info("[response]返回记录： latency = {} responseParam = {}", stopWatch.getTotalTimeMillis(), subString(JSONUtil.toJsonStr(proceed)));
         return proceed;
     }
+
+    private String subString(String str) {
+        if (StringUtils.hasText(str) && str.length() > 1000) {
+            return str.substring(0, 1000);
+        } else {
+            return str;
+        }
+    }
 }