使用JSON.stringify转换JSON object到JSON string。

试试这个：

$(".faq_title").click(function(){
    var title = $(this).text();
    $.post('faq/get_faq_data', { title: title }, function (data) {
       document.write(JSON.stringify(data));
    }, "json");
});

我认为，这对您有帮助-

$(".faq_title").click(function(){
        var title = $(this).text();
        $.post('faq/get_faq_data', { title: title }, function (data) {
           //document.write(JSON.stringify(data));
           var my_obj = data;
           $.each(my_obj, function (i, z) {
              var id = my_obj[i].faq_id;
              var title = my_obj[i].faq_title;
              var question = my_obj[i].faq_question;
              var answer = my_obj[i].faq_answer;
              console.log("ID: " + id + "; Title: " + title + "; Question: " + question + "; answer: " + answer);
            });
        }, "json");
    });