$.ajax({
        url: "${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'){
              //有異常的信息時
            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":"異常信息"}

java中：

List pngFileList = new ArrayList();//某對象集合
if(null != pngFileList && pngFileList.size() > 0) {
JSONArray pngFileArray =JSONArray.fromObject(pngFileList);

}
if(null != pngFileArray){
this.setTextAjax(pngFileArray.toString());
//異常的格式
//this.setTextAjax("{\"status\":\"500\",\"msg\":\""+errormsg+"\"}");//沒有記錄

/**
* 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);
}

第二個案例：jQuery 遍歷JSON 對象

不說別的，直接貼代碼：

<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>

第三個案例：jquery中遍歷讀取json串中的對象

假設(shè)我們從服務(wù)器端獲取如下的json串，其中包括數(shù)組。我們該如何遍歷讀取呢？

復(fù)制代碼代碼如下:

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

使用.each難度太高，直接js讀取吧

//通過url獲取json對象     
     $.post("json/godjson!godlist", function (data){ 
//data.rows返回的是json字符串。需要轉(zhuǎn)換成json對象 
       var json = eval(data.rows) 
//json變量現(xiàn)在就是一個數(shù)組對象，直接讀取每個數(shù)組對象。結(jié)合屬性進行輸出 
       for(var i=0; i<json.length; i++){ 
        alert(json[i].caishen+"--------- " + json[i].xishen); 
       } 
//記得返回的數(shù)據(jù)類型一定要是json類型 
    }, "json");

通過如上的方式就能獲取json串的json對象并進行輸出。

為大家分享這么多的案例，就是想幫助大家掌握jquery遍歷json對象集合的方法，真正理解，希望這篇文章可以幫助到大家。

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