#Quoted-Printable编码格式
str = "=E6=B5=8B=E8=AF=95=E5=88=86=E7=BA=A7=E6=AF=8D2"
#转成UTF-8
str.unpack("M")[0].force_encoding('UTF-8')
=> "测试分级母2"
#Quoted-Printable编码格式
str = "=E6=B5=8B=E8=AF=95=E5=88=86=E7=BA=A7=E6=AF=8D2"
#转成UTF-8
str.unpack("M")[0].force_encoding('UTF-8')
=> "测试分级母2"