避免Long精度丢失

maku-framework/src/main/java/net/maku/framework/common/config/BigNumberSerializer.java

@@ -0,0 +1,41 @@
+package net.maku.framework.common.config;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
+import com.fasterxml.jackson.databind.ser.std.NumberSerializer;
+
+import java.io.IOException;
+
+/**
+ * 解决js精度丢失问题
+ *
+ * @author 阿沐 babamu@126.com
+ * <a href="https://maku.net">MAKU</a>
+ */
+@JacksonStdImpl
+public class BigNumberSerializer extends NumberSerializer {
+    /**
+     * JS Number.MAX_SAFE_INTEGER  Number.MIN_SAFE_INTEGER
+     */
+    private static final long MAX_SAFE_INTEGER = 9007199254740991L;
+    private static final long MIN_SAFE_INTEGER = -9007199254740991L;
+    /**
+     * 提供实例
+     */
+    public static final BigNumberSerializer INSTANCE = new BigNumberSerializer(Number.class);
+
+    public BigNumberSerializer(Class<? extends Number> rawType) {
+        super(rawType);
+    }
+
+    @Override
+    public void serialize(Number value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+        // 超出范围 序列化位字符串
+        if (value.longValue() > MIN_SAFE_INTEGER && value.longValue() < MAX_SAFE_INTEGER) {
+            super.serialize(value, gen, provider);
+        } else {
+            gen.writeString(value.toString());
+        }
+    }
+}

maku-framework/src/main/java/net/maku/framework/common/config/JacksonConfig.java

@@ -38,6 +38,10 @@ public class JacksonConfig {
             builder.deserializerByType(LocalTime.class,
                     new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
             // builder.serializationInclusion(JsonInclude.Include.NON_NULL);
+
+            // 避免Long精度丢失，超过JS最大精度，使用String类型
+            builder.serializerByType(Long.class, BigNumberSerializer.INSTANCE);
+
             builder.failOnUnknownProperties(false);
             builder.featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
         };