添加gson依赖

pom.xml

@@ -37,6 +37,7 @@
		<qcloud.cos.version>4.4</qcloud.cos.version>
		<swagger.version>2.7.0</swagger.version>
		<joda.time.version>2.9.9</joda.time.version>
		<gson.version>2.8.5</gson.version>
		<fastjson.version>1.2.60</fastjson.version>
		<hutool.version>4.1.1</hutool.version>
		<lombok.version>1.18.4</lombok.version>
@@ -211,6 +212,11 @@
			<artifactId>joda-time</artifactId>
			<version>${joda.time.version}</version>
		</dependency>
		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
			<version>${gson.version}</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>