文件地址：Windows\System32\inetsrv\config\applicationHost.config
在其中的<dynamicTypes>（即动态压缩类型）节中增加以下两个配置即可：
<add mimeType="application/json" enabled="true" />
<add mimeType="application/json; charset=utf-8" enabled="true" />
配置完毕后
<system.webServer>
<urlCompression doDynamicCompression="true" />
<httpCompression>
<dynamicTypes>
<add mimeType="application/json" enabled="true" />
<add mimeType="application/json; charset=utf-8" enabled="true" />
</dynamicTypes>
</httpCompression>
</system.webServer>