原来的launch.json

{"version": "0.2.0","configurations": [{"name": "Golang","type": "go","request": "launch","program": "${workspaceFolder}","args": []}]
}

如果报以下错误：

Couldn’t start dlv dap：
Error：Cannot find Delve debugger (dlv dap)

需要安装github.com/go-delve/delve/cmd/dlv

go版本1.16以上，执行

go install github.com/go-delve/delve/cmd/dlv@latest

1.16以下

go get github.com/go-delve/delve/cmd/dlv

安装完成后就可以DEBUG了