尝试使用post作为方法类型，大多数Web服务是受保护的，并且需要使用post而不是Get进行转换

另外还可以帮助您调试错误以及错误提示信息。

 $.ajax({
     url: WEBSERVICE_URL,
     type: "POST", //This is what you should chage
     dataType: "application/json; charset=utf-8",
     username: "admin", // Most SAP web services require credentials
     password: "admin",
     processData: false,
     contentType: "application/json",
     success: function () {
         alert("success");
     },
     error: function (xhr, ajaxOptions, thrownError) { //Add these parameters to display the required response
         alert(xhr.status);
         alert(xhr.responseText);
     },
 });