SpringMVC的handler接收如下的ServletAPI类型的参数：
? HttpServletRequest
? HttpServletResponse
? HttpSession
? java.security.Principal
? Locale
? InputStream
? OutputStream
? Reader
? Writer
示例：
@RequestMapping("/testServletAPI")
public void testServletAPI(HttpServletRequest request, HttpServletResponse response, Writer out) throws IOException {
System.out.println("testServletAPI: " + request + "," + response);
out.write("hello springmvc");
}
对应的jsp：
<a href="test/testServletAPI">Test ServletAPI</a>
运行项目，点击超链接：
控制台输出：
testServletAPI: org.apache.catalina.connector.RequestFacade@21f0bb9b,org.apache.catalina.connector.ResponseFacade@7d1613c6
原文：https://www.cnblogs.com/stm32stm32/p/9093110.html