vscode output can't display none ASCII text

[niphor]

when i start a server , in output window it shows bunch of ??????????, which should be some chinese text

i changed my vm config

{
  "args.override.boolean": "true",
  "args.shutdown.vm.override.string": "-Dfile.encoding=UTF-8 ...",
  "args.vm.override.string": "-Dfile.encoding=UTF-8 ...",
}

it‘s not woking，it shows � instead

i open output with editor, and try to change encodings with no luck

I'm working with devcontainer using mcr.microsoft.com/devcontainers/java:2-8 image