前台通过 post 提交数据（utf-8编码），后台读取到requestbody 中文出现乱码

使用 request.setCharacterEncoding(“UTF-8”); 方式无效，中文依旧乱码

最后通过URLDecoder解码解决：
result = java.net.URLDecoder.decode(result, “UTF-8”);

代码如下：

	StringBuilder buffer = new StringBuilder("");
	
	BufferedReader reader = new BufferedReader(new InputStreamReader(request.getInputStream(),"UTF-8"));
	String line = null;
	while((line = reader.readLine()) != null){
		buffer.append(line);
	 }
	
	String result = buffer.toString();
	
	// 使用URLDecoder解码，解决中文乱码
	result = java.net.URLDecoder.decode(result, "UTF-8");
	
	System.out.println(result);