How to pass special character data in Ajax

This time I will show you how to pass special characters data in Ajax, and what are the precautions for passing special character data in Ajax. The following is a practical case, let’s take a look. take a look.

Problem Description

As follows, text containing special characters is encapsulated in JSON and passed through Ajax,

var data = {"Id": id, "text": text};

Unable to receive data in the background.

Solution

Replace

req.setRequestHeader("Content-Type",
        "application/x-www-form-urlencoded");

with:

req.setRequestHeader("Content- type",
"application/json; charset=utf-8");

Receive data in the background:

 //进行json数据的接收
    StringBuilder sb = new StringBuilder();
    BufferedReader br = request.getReader();
    char[] buff = new char[10000];
    int len;
    while((len = br.read(buff)) != -1){
      sb.append(buff, 0, len);
    }
    String mess = sb.toString();
    //将字符串转换为JSON对象
    JSONObject jsonObject=new JSONObject(mess);
    //获取其中的值
    jsonObject.getInt("Id");
    //含有特殊字符的文本需要先进行转码
    URLDecoder.decode(jsonObject.getString("text"), "UTF-8"));

I believe you have mastered the method after reading the case in this article, and there will be more exciting things Please pay attention to other related articles on php Chinese website!

Recommended reading:

How to implement AJAX paging effect

How to use Ajax to submit a form and receive the json data therein

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