response headers 始终是 charset=iso-8859-1 - WXOPEN Club

wx.request({

url: app.globalData._server + '/weixin/kuaidi/query',

method: 'POST',

dataType:'json',

// responseType:'arraybuffer',

header: {

"Content-Type": "application/x-www-form-urlencoded"

},

data:{

expCode: SHOPPING_NAME,

expNo: SHOPPING_CODE

},

success: function (res) {

wx.hideLoading();

that.setData({ wulMesge: res.data.data });

console.log(res.data.Traces);

}

});

中文会乱码

我需要utf-8格式的响应，怎么写都是 charset=iso-8859-1，请问大佬怎么解决，多谢