HttpServletResponse(响应)和HttpServletRequest(请求) (待更)

2020-12-30 12:28

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标签:ade   web服务   servlet   request   set   tps   bsp   use   eset   

1. HttpServletResponse

web服务器接收到客户端的http请求,这对这个请求,分别创建一个代表请求的HttpServletRequest对象,代表响应的一个HttpServletResponse;

  如果要获取客户端请求过来的参数:找HttpServletRequest

   如果要给客户端响应一些信息:找HttpServletResponse

1.1简单分类

  负责向浏览器发送数据的方法

 1.ServletOutputStream getOutputStream() throws IOException;

 2.PrintWriter getWriter() throws IOException;

    

  负责向浏览器发送响应头的方法

    void setCharacterEncoding(String var1);

    void setContentLength(int var1);

    void setContentLengthLong(long var1);

    void setContentType(String var1);


    void setDateHeader(String var1, long var2);

    void addDateHeader(String var1, long var2);

    void setHeader(String var1, String var2);

    void addHeader(String var1, String var2);

    void setIntHeader(String var1, int var2);

    void addIntHeader(String var1, int var2);

 

  响应的状态码

 int SC_CONTINUE = 100;
    int SC_SWITCHING_PROTOCOLS = 101;
    int SC_OK = 200;
    int SC_CREATED = 201;
    int SC_ACCEPTED = 202;
    int SC_NON_AUTHORITATIVE_INFORMATION = 203;
    int SC_NO_CONTENT = 204;
    int SC_RESET_CONTENT = 205;
    int SC_PARTIAL_CONTENT = 206;
    int SC_MULTIPLE_CHOICES = 300;
    int SC_MOVED_PERMANENTLY = 301;
    int SC_MOVED_TEMPORARILY = 302;
    int SC_FOUND = 302;
    int SC_SEE_OTHER = 303;
    int SC_NOT_MODIFIED = 304;
    int SC_USE_PROXY = 305;
    int SC_TEMPORARY_REDIRECT = 307;
    int SC_BAD_REQUEST = 400;
    int SC_UNAUTHORIZED = 401;
    int SC_PAYMENT_REQUIRED = 402;
    int SC_FORBIDDEN = 403;
    int SC_NOT_FOUND = 404;
    int SC_METHOD_NOT_ALLOWED = 405;
    int SC_NOT_ACCEPTABLE = 406;
    int SC_PROXY_AUTHENTICATION_REQUIRED = 407;
    int SC_REQUEST_TIMEOUT = 408;
    int SC_CONFLICT = 409;
    int SC_GONE = 410;
    int SC_LENGTH_REQUIRED = 411;
    int SC_PRECONDITION_FAILED = 412;
    int SC_REQUEST_ENTITY_TOO_LARGE = 413;
    int SC_REQUEST_URI_TOO_LONG = 414;
    int SC_UNSUPPORTED_MEDIA_TYPE = 415;
    int SC_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
    int SC_EXPECTATION_FAILED = 417;
    int SC_INTERNAL_SERVER_ERROR = 500;
    int SC_NOT_IMPLEMENTED = 501;
    int SC_BAD_GATEWAY = 502;
    int SC_SERVICE_UNAVAILABLE = 503;
    int SC_GATEWAY_TIMEOUT = 504;
    int SC_HTTP_VERSION_NOT_SUPPORTED = 505;

 

  1.2常见应用

    1.向浏览器输出信息

    2.下载文件(步骤)

      2.1 获取下载文件路径

      2.2 下载文件的名是什么

      2.3 设置让浏览器能够支持下载我们需要的东西

      2.4 获取下载文件的输入流

      2.5 创建缓冲区

      2.6 获取OutpuitStream对象

      2.7 将FileOutputstream流写入到buffer缓冲区

      2.8 使用OutputStream将缓冲区中的数据输出的客户端

    

2.HttpServletRequest

 

HttpServletResponse(响应)和HttpServletRequest(请求) (待更)

标签:ade   web服务   servlet   request   set   tps   bsp   use   eset   

原文地址:https://www.cnblogs.com/CL-King/p/13769418.html


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