HttpServletResponse 获取返回结果

可以通过以下方式获取 HttpServletResponse 返回的结果：

1. 获取输出流对象：

PrintWriter out = response.getWriter();

2. 将数据写入输出流中：

out.write("Hello, World!");

3. 关闭输出流：

out.close();

完整示例代码：

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.write("Hello, World!");
    out.close();
}