jquery遍历json对象集合详解

2019-11-20 10:00:26

字体：大中小

来源：转载

供稿：网友

本文实例采用案例分析的方法介绍了jquery遍历json对象的三种情况，供大家参考，具体内容如下

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="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。

上一篇：如何判断Javascript对象是否存在的简单实例

下一篇：深入理解JavaScript中的对象复制(Object Clone)