HttpServletRequest获取json

HttpServletRequest获取JSON的方式有多种。其中一种常见的方法是通过获取POST请求的输入流，然后将输入流转换为字符流，并进行字符缓冲读取，拼接成字符串，最后使用JSON解析工具解析成JSON对象的形式。具体步骤如下：
1. 从HttpServletRequest中获取输入字节流：ServletInputStream requestInputStream = request.getInputStream();
2. 将字节流转换为字符流，并设置字符编码为UTF-8：InputStreamReader ir = new InputStreamReader(requestInputStream, "UTF-8");
3. 使用字符缓冲流进行读取：BufferedReader br = new BufferedReader(ir);
4. 开始拼装JSON字符串：String line = null; StringBuilder sb = new StringBuilder(); while((line = br.readLine()) != null) { sb.append(line); }
5. 使用JSON解析工具解析字符串为JSON对象：JSONObject json = JSONObject.parseObject(sb.toString());
6. 最后，你可以根据需要返回解析后的JSON对象或者继续进行其他操作。

总结起来，HttpServletRequest获取JSON的过程可以通过获取输入流，转换为字符流，进行字符缓冲读取，拼接成字符串，然后使用JSON解析工具进行解析。这样就可以获取到HttpServletRequest中的JSON数据了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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