From 36d5872ae1c45238964d44a419c2aa46764edd4e Mon Sep 17 00:00:00 2001
From: yulichang <570810310@qq.com>
Date: Sat, 12 Nov 2022 15:14:08 +0800
Subject: [PATCH] =?UTF-8?q?fix=20=E5=90=AF=E5=8A=A8=E7=A9=BA=E6=8C=87?=
 =?UTF-8?q?=E9=92=88=E5=BC=82=E5=B8=B8?=
MIME-Version: 1.0
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---
 .../com/github/yulichang/mapper/MPJTableMapperHelper.java     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/github/yulichang/mapper/MPJTableMapperHelper.java b/src/main/java/com/github/yulichang/mapper/MPJTableMapperHelper.java
index 450343f..b4f1541 100644
--- a/src/main/java/com/github/yulichang/mapper/MPJTableMapperHelper.java
+++ b/src/main/java/com/github/yulichang/mapper/MPJTableMapperHelper.java
@@ -14,7 +14,9 @@ public class MPJTableMapperHelper {
     private static final Map<Class<?>, Class<?>> CACHE = new ConcurrentHashMap<>();
 
     public static void init(Class<?> clazz, Class<?> mapper) {
-        CACHE.put(clazz, mapper);
+        if (clazz != null) {
+            CACHE.put(clazz, mapper);
+        }
     }
 
     public static Class<?> get(Class<?> clazz) {