Web服务器收到客户端的http请求,会针对每一次请求,分别创建一个用于代表请求的request对象、和代表响应的response对象。 request和response对象即然代表请求和响应,那我们要获取客户机提交过来的数据,只需要找request对象就行了。要向客户机输出数据,只需要找response对象就行了。 一、HttpServletResponse对象介绍 HttpServl...
publicObject userLogin(HttpServletRequest request, HttpServletResponse response, String email, String password, String captcha) { //获取sessionId String jsessionIdSt= getCookieStringByKey(request, "JSESSIONID");if(StringUtils.isEmpty(jsessionIdSt)) {returnResultVOUtil.retFailed("登录缓存信息为空"); }...
publicvoiddoGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{response.setContentType("text/html");//response.setContentType("text/html;charset=UTF-8");//防止乱码PrintWriter out=response.getWriter();out.println("The big watermelon in the East");out.print(...
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1. 解决乱码:POST,getReader() //request.setCharacterEncoding("UTF-8");//设置字符输入流的编码 //2. 获取username String username = request.getParameter("username"); System.out.printl...
String contextPath=request.getContextPath();response.sendRedirect(contextPath+"/responseDemo2"); 3.2 服务器输出字符数据到浏览器 实现步骤: 获取字符输出流 输出数据 注意:乱码的问题,产生的原因就是因为编解码的不一致,需要设置输出流的默认编码,告诉浏览器响应体使用的编码,设置方法:response.setContentType("...
ServletServerHttpResponse 有ServletServerHttpRequest就有ServletServerHttpResponse,大致原理差不多。它正好和ServletServerHttpRequest相反,如果我们需要去处理响应问题,比如想通过HttpServletResponse写个JSON响应,大概可以这么写: ServletServerHttpResponse servletServerHttpResponse = new ServletServerHttpResponse(response); ...
重写Service(request,response)方法" - 2.编写配置文件(web.xml) " 注册servlet 绑定路径" - 3.测试 " http://localhost:8080/项目名称/绑定路径" - Servlet API "查询javaEE的API" - Servlet:接口 - (掌握★)init:初始化(第一次访问Servlet的实现类时候进行初始化,也就是说开启实现Servlet类和继承Servlet...
在代码中自己获取一个HttpServletResponse ServletRequestAttributesrequestAttributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();HttpServletResponseresp=requestAttributes.getResponse();resp.setHeader("Access-Control-Allow-Origin",request.getHeader("Origin"));resp.setHeader("Access-Control-...
request和response对象即然代表请求和响应,那我们要获取客户机提交过来的数据,只需要找request对象就行了。要向客户机输出数据,只需要找response对象就行了 HttpServletResponse对象服务器的响应。这个对象中封装了向客户端发送数据、发送响应头,发送响应状态码的方法。
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 details and an empty response object wh...