ajax 接收json数据的进一步了解

 var url = "../searchclasses";$.ajax({url: url,type: "post",dataType: "json",//以json形式接收error: function() {alert("error");},success: function(data) {var html = "";$.each(data, function(index, content) {var kch = content.KCH,kcm = content.KCM,ks = content.KS,kcdm = content.KCDM;html = kch + " " + kcm + " " + ks + " "kcdm;$("#main .main-serarch-box").append(html);});}});

加个error:function(){

alert("error");

}

来判断是否成功接收到了json数据

 

后台组装json

    out.print("[");for (int i = 1; i <= totalRecord && boo; i++) {int kch = rowSet.getInt(1);String kcm = rowSet.getString(2);Float ks = rowSet.getFloat(3);String kcdm = rowSet.getString(4);if (i != totalRecord) {out.println("{ \"KCH\" : \"" + kch+ "\" , \"KCM\" : \"" + kcm + "\",\"KS\" : \""+ ks + "\" , \"KCDM\" : \"" + kcdm + "\"},");} else {out.println("{ \"KCH\" : \"" + kch+ "\" , \"KCM\" : \"" + kcm + "\",\"KS\" : \""+ ks + "\" , \"KCDM\" : \"" + kcdm + "\"}");}// 这里出现了小问题，i的最后一个判断之前没搞清boo = rowSet.next();}out.print("]");

复制开发者工具栏的json数据到 http://www.bejson.com/  

json工具检验网站检验下，检查从前台收到的data是否真的是json数据，

 

json的数组格式为 [{},{},{}]

之前因为少了一个[] 导致error回调函数接收到的为error；

接收成功就是根据json对象来调用json数据

   $.each(data, function(index, content) {var kch = content.KCH,kcm = content.KCM,ks = content.KS,kcdm = content.KCDM;html = kch + " " + kcm + " " + ks + " "kcdm;$("#main .main-serarch-box").append(html);});

 

然后拼装数据就就可以了。