控制器:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | package com.awaimai.web; import org.springframework.web.bind.annotation.*; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Enumeration; @RestController public class kzq { @RequestMapping (value = "/test1" ) public String test1(HttpServletRequest request) { System.out.println(request.getMethod()); System.out.println(request.getPathInfo()); System.out.println(request.getRequestURI()); System.out.println(request.getRequestURL()); System.out.println(request.getQueryString()); StringBuilder sb = new StringBuilder(); Enumeration<String> headerNames = request.getHeaderNames(); while (headerNames.hasMoreElements()) //软件系统开发定制读取请求消息头 { String name = headerNames.nextElement(); sb.append(name + ":" + request.getHeader(name) + "<br>" ); } return sb.toString(); } @RequestMapping (value = "/test2" ) public String test2(HttpServletResponse response) { response.setHeader( "content-type" , "text/html;charset=UTF-8" ); //软件系统开发定制告知浏览器使用什么码表 //软件系统开发定制告知客户端不缓存 response.setHeader( "pragma" , "no-cache" ); response.setHeader( "cache-control" , "no-cache" ); response.setDateHeader( "expires" , 0 ); //添加Cookie response.addCookie( new Cookie( "cook-001-name" , "cookie-001-value" )); response.addCookie( new Cookie( "cook-002-name" , "cookie-002-value" )); response.setStatus( 404 ); //软件系统开发定制我们将状态设置成404 return "test2" ; } } |
打印如下:
GET
null
/test1
http://localhost:8080/test1
null
web访问如下:
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url中带参数: http://localhost:8080/test1?a=b&c=2
打印如下:
web访问如下:
=============================================================================
=============================================================================
post 访问如下:
user-agent:PostmanRuntime/7.28.2<br>
accept:*/*<br>
:no-cache<br>
postman-token:a67b445a-48b2-46b9-b850-299d9eec5641<br>
host:localhost:8080<br>
accept-encoding:gzip, deflate, br<br>
connection:<br>
===================================================================
===================================================================
HttpServletRequest
HttpServletRequest软件系统开发定制对象代表客户端的请求,当客户端通过访问服务器时,HTTP请求头中的所有信息都封装在这个对象中,
开发人员通过这个对象的方法,可以获得客户这些信息。
主要功能:参数解析,Cookie读取,http请求字段,文件上传
1.请求行
getMethod(); 获得请求方式。
getQueryString() ; 返回请求行中的参数部分。
getRequestURI(); 返回请求行中的资源名部分。
getRequestURL();返回客户端发出请求时的完整URL。
==============================================================================
==============================================================================
2.请求消息头
String getHeader(String name) 根据请求消息头名称称得到请求消息头信息值。
Enumeration getHeaderNames() 得到所有请求消息头名称。
Enumeration getHeaders(String name) 根据头名称得到相同名称请求头信息值。
String getCookies() 获取请求消息头中的cookie值。
- package com.awaimai.web;
-
- import org.springframework.web.bind.annotation.*;
- import javax.servlet.http.Cookie;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import java.util.Enumeration;
-
- @RestController
- public class kzq
- {
- @RequestMapping(value = "/test1")
- public String test1(HttpServletRequest request)
- {
- System.out.println(request.getMethod());
- System.out.println(request.getPathInfo());
- System.out.println(request.getRequestURI());
- System.out.println(request.getRequestURL());
- System.out.println(request.getQueryString());
-
- StringBuilder sb = new StringBuilder();
- Enumeration<String> headerNames = request.getHeaderNames();
- while (headerNames.hasMoreElements()) //读取请求消息头
- {
- String name = headerNames.nextElement();
- sb.append(name + ":" + request.getHeader(name) + "<br>");
- }
-
- return sb.toString();
-
- }
-
-
- @RequestMapping(value = "/test2")
- public String test2(HttpServletResponse response)
- {
- response.setHeader("content-type", "text/html;charset=UTF-8"); //告知浏览器使用什么码表
-
- //告知客户端不缓存
- response.setHeader("pragma", "no-cache");
- response.setHeader("cache-control", "no-cache");
- response.setDateHeader("expires", 0);
-
- //添加Cookie
- response.addCookie(new Cookie("cook-001-name" ,"cookie-001-value"));
- response.addCookie(new Cookie("cook-002-name" ,"cookie-002-value"));
-
- response.setStatus(404); //我们将状态设置成404
- return "test2";
- }
-
-
- @RequestMapping(value = "/test3")
- public String test3(HttpServletRequest request)
- {
- StringBuilder sb = new StringBuilder();
- Enumeration<String> headerNames = request.getHeaderNames();
- while (headerNames.hasMoreElements())
- { //读取请求消息头
- String name = headerNames.nextElement();
- sb.append(name + ":" + request.getHeader(name) + "<br>");
- }
- return sb.toString();
-
- }
-
-
-
- }
=================================================================
=================================================================
http://localhost:8080/test2 获取浏览器设置的返回的cookie;
http://localhost:8080/test3 打开这个链接,发现访问这个url的时候,浏览器自动带上cookie,返回给服务器,服务器获取后进行打印
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | package com.awaimai.web; import org.springframework.web.bind.annotation.*; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Enumeration; @RestController public class kzq { @RequestMapping (value = "/test1" ) public String test1(HttpServletRequest request) { System.out.println(request.getMethod()); System.out.println(request.getPathInfo()); System.out.println(request.getRequestURI()); System.out.println(request.getRequestURL()); System.out.println(request.getQueryString()); StringBuilder sb = new StringBuilder(); Enumeration<String> headerNames = request.getHeaderNames(); while (headerNames.hasMoreElements()) //读取请求消息头 { String name = headerNames.nextElement(); sb.append(name + ":" + request.getHeader(name) + "<br>" ); } return sb.toString(); } @RequestMapping (value = "/test2" ) public String test2(HttpServletResponse response) { response.setHeader( "content-type" , "text/html;charset=UTF-8" ); //告知浏览器使用什么码表 //告知客户端不缓存 response.setHeader( "pragma" , "no-cache" ); response.setHeader( "cache-control" , "no-cache" ); response.setDateHeader( "expires" , 0 ); //添加Cookie response.addCookie( new Cookie( "cook-001-name" , "cookie-001-value" )); response.addCookie( new Cookie( "cook-002-name" , "cookie-002-value" )); response.setStatus( 404 ); //我们将状态设置成404 return "test2" ; } @RequestMapping (value = "/test3" ) public String test3(HttpServletRequest request) { StringBuilder sb = new StringBuilder(); if (request.getCookies()!= null ){ for (Cookie cookie :request.getCookies()){ sb.append( "Cookie: " + cookie.getName()+ " value: " + cookie.getValue()); } } return sb.toString(); } } |
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getParameter(name)方法 获取请求中的参数,该参数是由name指定。
getParameterValues(String name)方法 获取指定名称参数的所有值数组。它适用于一个参数名对应多个值的情况。如页面表单中的复选框,多选列表提交的值。
getParameterNames() 方法返回一个包含请求消息中的所有参数名的Enumeration对象。通过遍历这个Enumeration对象,就可以获取请求消息中所有的参数名。
getCharacterEncoding() 返回请求的字符编码方式。
getAttributeNames()返回当前请求的所有属性的名字集合赋值:setAttribute()。
getAttribute(String name) 返回name指定的属性值。
getsession()返回和客户端相关的session,如果没有给客户端分配session,则返回null。
getParameterMap():返回一个保存了请求消息中的所有参数名和值的Map对象。
Map对象的key是字符串类型的参数名,value是这个参数所对应的Object类型的值数组
RequestDispatcher.forward() 方法的请求转发过程结束后,浏览器地址栏保持初始的URL地址不变。
方法在服务器端内部将请求转发给另外一个资源,浏览器只知道发出了请求并得到了响应结果,并不知道在服务器程序内部发生了转发行为。
setCharacterEncoding(“utf-8”);
getReader() 获取请求体的数据流
getInputStream() 获取请求的输入流中的数据
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控制器:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | package com.awaimai.web; import org.springframework.web.bind.annotation.*; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @RestController public class kzq { @RequestMapping (value = "/test2" ) public String test2(HttpServletResponse response) { response.setHeader( "content-type" , "text/html;charset=UTF-8" ); //告知浏览器使用什么码表 //告知客户端不缓存 response.setHeader( "pragma" , "no-cache" ); response.setHeader( "cache-control" , "no-cache" ); response.setDateHeader( "expires" , 0 ); //添加Cookie response.addCookie( new Cookie( "cook-001-name" , "cookie-001-value" )); response.addCookie( new Cookie( "cook-002-name" , "cookie-002-value" )); response.setStatus( 404 ); //我们将状态设置成404 return "success" ; } } |
post请求: