From fe31d61de9e80543a493e15d57dfd08e6d69af30 Mon Sep 17 00:00:00 2001
From: hexiaowu <hexiaowu1993@gmail.com>
Date: Fri, 12 Mar 2021 18:07:53 +0800
Subject: [PATCH] =?UTF-8?q?=E5=9B=A0JS=E7=B2=BE=E5=87=86=E5=BA=A6=E9=97=AE?=
 =?UTF-8?q?=E9=A2=98=EF=BC=8C=E6=9C=80=E5=A4=9A=E8=A1=A8=E7=A4=BA2^53-1?=
 =?UTF-8?q?=E7=9A=84=E6=95=B0=E5=80=BC=E3=80=82=20=E6=96=B0=E5=A2=9ELong?=
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---
 .../jackson/config/JacksonConfig.java         | 11 +++++++-
 .../framework/jackson/ser/LongSerializer.java | 26 +++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/cn/iocoder/dashboard/framework/jackson/ser/LongSerializer.java

diff --git a/src/main/java/cn/iocoder/dashboard/framework/jackson/config/JacksonConfig.java b/src/main/java/cn/iocoder/dashboard/framework/jackson/config/JacksonConfig.java
index 27d199a2d..323b447ce 100644
--- a/src/main/java/cn/iocoder/dashboard/framework/jackson/config/JacksonConfig.java
+++ b/src/main/java/cn/iocoder/dashboard/framework/jackson/config/JacksonConfig.java
@@ -1,7 +1,9 @@
 package cn.iocoder.dashboard.framework.jackson.config;
 
+import cn.iocoder.dashboard.framework.jackson.ser.LongSerializer;
 import cn.iocoder.dashboard.util.json.JsonUtils;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -11,8 +13,15 @@ public class JacksonConfig {
     @Bean
     @SuppressWarnings("InstantiationOfUtilityClass")
     public JsonUtils jsonUtils(ObjectMapper objectMapper) {
+        SimpleModule simpleModule = new SimpleModule();
+        /*
+         * 新增Long类型序列化规则，数值超过2^53-1，在JS会出现精度丢失问题，因此Long自动序列化为字符串类型
+          */
+        simpleModule.addSerializer(Long.class,LongSerializer.getInstance())
+                    .addSerializer(Long.TYPE,LongSerializer.getInstance());
+        objectMapper.registerModule(simpleModule);
+
         JsonUtils.init(objectMapper);
         return new JsonUtils();
     }
-
 }
diff --git a/src/main/java/cn/iocoder/dashboard/framework/jackson/ser/LongSerializer.java b/src/main/java/cn/iocoder/dashboard/framework/jackson/ser/LongSerializer.java
new file mode 100644
index 000000000..6c0561d23
--- /dev/null
+++ b/src/main/java/cn/iocoder/dashboard/framework/jackson/ser/LongSerializer.java
@@ -0,0 +1,26 @@
+package cn.iocoder.dashboard.framework.jackson.ser;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+
+import java.io.IOException;
+
+/**
+ * Long类型序列化规则
+ * <p>
+ * 数值超过2^53-1，在JS会出现精度丢失问题，因此Long自动序列化为字符串类型
+ */
+public class LongSerializer extends JsonSerializer<Long> {
+
+    private static final LongSerializer LONG_SERIALIZER = new LongSerializer();
+
+    @Override
+    public void serialize(Long value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
+        gen.writeString(value.toString());
+    }
+
+    public static LongSerializer getInstance() {
+        return LONG_SERIALIZER;
+    }
+}