1protectedvoiddoGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {2String filename=request.getParameter("filename");3System.out.println(filename);4ServletContext context=this.getServletContext();5String mi=context.getMimeType("/download/"+filename);6Syst...
publicclassHelloServletextendsHttpServlet{@OverrideprotectedvoiddoGet(HttpServletRequest req, HttpServletResponse resp)throwsServletException, IOException {//this.getInitParameter(); 获取初始化参数//this.getServletConfig(); 获取Servlet配置//this.getServletContext(); 获取Servlet上下文ServletContextservletContext=t...
There are four main entities involved in the HTTP request-response model: Client Web container Request Response We will learn about request and response here. Container provides us with two objects corresponding to request and response, encapsulating the
request对象和response对象的原理①request和response对象是由服务器创建的。我们来使用它们②request对象是来获取请求消息,response对象是来设置响应消息 request对象继承体系结构: ServletRequest -- 接口 | 继承 HttpServletRequest -- 接口 | 实现 org.apache.catalina.connector.RequestFacade 类(tomcat) request功能: ...
除了model,@RequestParam @PathVariable可以传递参数外,还有HttpServletRequest和HttpServletResponse也可以进行参数传递。 Web服务器收到一个http请求,会针对每个请求创建一个HttpServletRequest和HttpServletResponse对象,向客户端发送数据找HttpServletResponse,从客户端取数据找HttpServletRequest. ...
一、HttpServletResponse 1.简单分类 (1)负责像浏览器发送数据的方法 ServletOutputStreamgetOutputStream()throwsIOException;PrintWritergetWriter()throwsIOException; (2)负责向浏览器发送响应头的方法 voidsetCharacterEncoding(String var1);voidsetContentLength(intvar1);voidsetContentType(String var1);voidsetDateHea...
request.getLocalPort() 获取服务器端的端口号 HttpServletResponse:一次发送给客户端的响应的相关信息 状态行 应答头 response.setHeader() 设置应答头 response.setContentType("text/html; charset=utf-8") 设置响应内容及字符集 响应实体 response.getWriter() 获取打印流,输出字符数据 ...
servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/Refresh") //扩展 HttpServlet 类 public class Refresh extends HttpServlet { // 处理 GET 方法请求的方法 public void doGet(...
HttpServletResponse获取响应消息内容 COOKIE cookie是一个以字符串的形式存储数据的位置 每一个 HTTP 请求都会在请求头中携带 cookie 到服务端 每一个 HTTP 响应都会在响应头中携带 cookie 到客户端 也就是说,cookie 是不需要我们手动设置,就会自动在 客户端 和 服务端之间游走的数据...
45 */46byte[]dataByteArr=data.getBytes("UTF-8");//将字符转换成字节数组,指定以UTF-8编码进行转换47outputStream.write(dataByteArr);//使用OutputStream流向客户端输出字节数组48}4950publicvoiddoPost(HttpServletRequest request,HttpServletResponse response)51throws ServletException,IOException{52doGet(request...