Home > Article > Web Front-end > jQuery parsing json data example analysis_jquery

jQuery parsing json data example analysis_jquery

WBOYOriginal: 2016-05-16 15:30:171235browse

This article analyzes the method of jQuery parsing json data through examples. Share it with everyone for your reference, the details are as follows:

Let’s take a look at our Json data format first:

[
{id:01,name:"小白",old:29,sex:"男"},
{id:02,name:"小蓝",old:29,sex:"男"},
{id:03,name:"小雅",old:29,sex:"男"}
]

In order to eliminate the problem of garbled characters, we set up a filter (code snippet)

public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
    req.setCharacterEncoding("UTF-8");
    resp.setCharacterEncoding("UTF-8");
    resp.setContentType("text/html;charset=UTF-8");
    chain.doFilter(req, resp);
}

On the server side, I use Servlet to generate json data (code snippet).

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    PrintWriter out = response.getWriter(); //过滤器已经做过编码转化了。 resp.setContentType("text/html;charset=UTF-8");
    StringBuffer sb = new StringBuffer();
    sb.append("[{id:01,name:\"小白\",old:29,sex:\"男\"},");
    sb.append("{id:02,name:\"小蓝\",old:29,sex:\"男\"},");
    sb.append("{id:03,name:\"小雅\",old:29,sex:\"男\"}]");
    out.print(sb);
}

JQuery code on the page:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>json学习</title>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
  <script type="text/javascript" src="jslib/jquery.js" charset="UTF-8"></script>
  <script type="text/javascript" charset="UTF-8">
    $(document).ready(function() {
      var select = $("#select");
      $.get("json.do", null, function(data) {
        var jsonData = eval(data);//接收到的数据转化为JQuery对象，由JQuery为我们处理
        $.each(jsonData, function(index, objVal) { //遍历对象数组，index是数组的索引号，objVal是遍历的一个对象。
          //val["属性"]可取到对应的属性值。
          $("<option>").attr("value", objVal["id"]).html(objVal["name"]).appendTo(select);
        });
      });
    });
  </script>
</head>
<body>
<select id="select"></select>
</body>
</html>

In order to save trouble before, I wrote the json data into json.txt and json.jsp without using Servlet encapsulation, but then I used Firebug to debug it

The json data written to .jsp and .txt files was not parsed. I debugged it in Firebug and found that the breakpoint at line 10 ended directly in the next step.

There is no traversing the object array. So I tested them separately

Text file json.txt
jsp file json.jsp
Servlet json.do

For the returned data, the browser can only parse the data returned by the Servlet as json data

I hope this article will be helpful to everyone in jQuery programming.

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：JS method to obtain the maximum value, minimum value and length of an array_javascript skillsNext article：JS method to obtain the maximum value, minimum value and length of an array_javascript skills

See more

jQuery parsing json data example analysis_jquery

Related articles