jquery遍历json对象集合详解

第一个案例：jquery 遍历json对象集合 常用示例

jsp中

$.ajax({ url: "${applicationScope.rootpath}common/getContractPage.html?userConId=${userConId}", type: "post", dataType:"json", data: {}, success: function (jsonText) { if(jsonText){ var status = jsonText.status; var msg = jsonText.msg; if(status == '500'){ //有异常的信息时 alert(msg); }else{ $.each(jsonText,function(i,item){ var pngPath = item[0]; var pngName = item[1]; }); } } } });

jsonText的格式：

{"status":"200","msg":[{"id":"1","name":"n1"},{"id":"2","name":"n2"}]} {"status":"500","msg":"异常信息"}

java中：

List pngFileList = new ArrayList();//某对象集合 if(null != pngFileList && pngFileList.size() > 0) { JSONArray pngFileArray =JSONArray.fromObject(pngFileList); } if(null != pngFileArray){ this.setTextAjax(pngFileArray.toString()); //异常的格式 //this.setTextAjax("{\"status\":\"500\",\"msg\":\""+errormsg+"\"}");//没有记录 /** * ajax返回html,包括json形式 * * @param responseContent */ public void setTextAjax(String responseContent) { try { HttpServletResponse response = getHttpResponse(); response.setContentType("text/html"); response.setCharacterEncoding("UTF-8"); response.setHeader("Pragma", "No-cache"); response.setHeader("Content-Type", "text/html"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expires", 0); PrintWriter out = response.getWriter(); out.print(responseContent); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } // ajaxResponse = new StringBufferInputStream(responseContent); }

第二个案例：jQuery 遍历JSON 对象

不说别的，直接贴代码：

<script src="https://www.jb51.net/js/jquery-1.6.4.js" type="text/javascript"></script> <script type="text/javascript"> $(document).ready(function() { $("#Link").click(function() { var objson = "[{Title:'Sjr',Content:'Library',summary:'summary'},{Title:'Sjr',Content:'Library',summary:[{sum0:'sum0'},{sum0:'sum1'},{sum0:'sum2'}]},{Title:'Sjr',Content:'Library',summary:[{sum0:'sum0'},{sum0:'sum1'},{sum0:'sum2'}]}]"; var obj = eval(objson); $(obj).each(function(index) { var val = obj[index]; if (typeof (val.summary) == "object") { $(val.summary).each(function(ind) { alert(val.Title + " " + val.Content + " " + val.summary[ind].sum0); }); } else { alert(val.Title + " " + val.Content + " " + val.summary); } }); }); }); </script>

第三个案例：jquery中遍历读取json串中的对象

假设我们从服务器端获取如下的json串，其中包括数组。我们该如何遍历读取呢？

复制代码 代码如下:

{"result":null,"rows":[{"caishen":"东","fushen":"西北","huajiazi":"甲子","id":1,"nayin":"大海水","shengmen":"南","simen":"北","wugui":"西","xishen":"东南","yanggui":"西南","yingui":"东北"},{"caishen":"东北","fushen":"北","huajiazi":"乙丑","id":2,"nayin":"大林木","shengmen":"西北","simen":"西南","wugui":"东南","xishen":"东","yanggui":"西","yingui":"南"},{"caishen":"西","fushen":"东","huajiazi":"丙寅","id":3,"nayin":"石榴木","shengmen":"北","simen":"西北","wugui":"南","xishen":"东南","yanggui":"东北","yingui":"西南"}],"total":3} 

使用.each难度太高，直接js读取吧

//通过url获取json对象 $.post("json/godjson!godlist", function (data){ //data.rows返回的是json字符串。需要转换成json对象 var json = eval(data.rows) //json变量现在就是一个数组对象，直接读取每个数组对象。结合属性进行输出 for(var i=0; i<json.length; i++){ alert(json[i].caishen+"--------- " + json[i].xishen); } //记得返回的数据类型一定要是json类型 }, "json");

通过如上的方式就能获取json串的json对象并进行输出。

为大家分享这么多的案例，就是想帮助大家掌握jquery遍历json对象集合的方法，真正理解，希望这篇文章可以帮助到大家。

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