ajax设置header

setting参数 headers

$.ajax({
    headers: {
        Accept: "application/json; charset=utf-8"
    },
    type: "get",
    success: function (data) {
    }
});

beforeSend设置header

$.ajax({
    type: "GET",
    url: "default.do",
    beforeSend: function(request) {
        request.setRequestHeader("Test", "Chenxizhang");
    },
    success: function(result) {
        alert(result);
    }
});

$.ajaxSetup()全局设置Header请求头

// 设置请求默认值
$.ajaxSetup({
    beforeSend: function (xhr) { //可以设置自定义标头
       	// 将token塞进Header里
        xhr.setRequestHeader('Authorization', 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9');
      	xhr.setRequestHeader('Content-Type', 'application/json'); // application/x-www-form-urlencoded
    },
  	complete: function (xhr) {
      	// 设置登陆拦截
        if (xhr.responseJSON.code == "error_unauth") {
            console.log("没有登录！");
            layer.msg("没有登录！");
            // location.href="login.html";
        } else {
            console.log("已经登录！");
        }
    },
});

或

// 设置请求默认值
$.ajaxSetup({
    headers: { // 默认添加请求头
        "Authorization": "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9" ,
        "Content-Type": "application/json"
    } ,
  	complete: function (xhr) {
      	// 设置登陆拦截
        if (xhr.responseJSON.code == "error_unauth") {
            console.log("没有登录！");
            layer.msg("没有登录！");
            // location.href="login.html";
        } else {
            console.log("已经登录！");
        }
    },
});