fix: 修复时间差8小时问题，JacksonConfig 设置 Asia/Shanghai 时区，Dockerfile 添加 TZ 环境变量

Dockerfile

@@ -1,5 +1,8 @@
 FROM eclipse-temurin:21-jre
 
+ENV TZ=Asia/Shanghai
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
 WORKDIR /app
 
 COPY target/cool-admin-8.0.0.jar /app/cool-admin-8.0.0.jar

src/main/java/com/cool/core/config/JacksonConfig.java

@@ -9,6 +9,7 @@ import com.fasterxml.jackson.databind.ser.std.NumberSerializer;
 import java.io.IOException;
 import java.math.BigInteger;
 import java.text.SimpleDateFormat;
+import java.util.TimeZone;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
@@ -29,6 +30,7 @@ public class JacksonConfig {
         objectMapper.registerModule(simpleModule);
         // 配置日期格式为 yyyy-MM-dd HH:mm:ss
         SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        dateFormat.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
         objectMapper.setDateFormat(dateFormat);
         return new MappingJackson2HttpMessageConverter(objectMapper);
     }