1 获取请求头数据

1.0 Usage

package com.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RequestParam;import org.springframework.ui.ModelMap;
import org.springframework.ui.Model;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import java.io.*;
import java.net.URLDecoder;import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Enumeration;@CrossOrigin(origins = "*", maxAge = 3600)
@Controller
@RequestMapping("/api")
public class HelloController{/*** Get request header informations, and return data in Map format.*/@RequestMapping(value="/return-header-map", method=RequestMethod.POST)@ResponseBody public Map retrunMap(HttpServletRequest req, HttpServletResponse res){Map<String, String> headerInfos = new HashMap<String, String>();Map<String, String> headerKV = new HashMap<String, String>();Enumeration<String> headerNames = req.getHeaderNames();System.out.format("header names: "+headerNames+"\n");headerInfos.put("method", req.getMethod());headerInfos.put("context", req.getContextPath());// headerInfos.put("headers", req.getHeaders("host"));headerInfos.put("Auth-type", req.getAuthType());return headerInfos;}/*** Get request header infomations, and return List format data.*/@RequestMapping(value="/return-header-list", method=RequestMethod.POST)@ResponseBody public List returnList(HttpServletRequest req, HttpServletResponse res){Map headerKV = new HashMap();Map outputInfos = new HashMap();List inputInfos = new ArrayList();List headerInfos = new ArrayList();outputInfos.put("name", "huahua");outputInfos.put("address", "shenzhen");inputInfos.add(outputInfos);headerKV.put("input", inputInfos);String defineHeader = req.getHeader("Authorization");headerKV.put("authorization", defineHeader);Enumeration<String> headerNames = req.getHeaderNames();while(headerNames.hasMoreElements()){String nextElement = headerNames.nextElement();headerKV.put(nextElement, req.getHeader(nextElement));}System.out.format("header key-value: "+headerKV+"\n");// inputInfos.add(headerKV);System.out.format("input infos: "+inputInfos+"\n");// headerKV.put("input", inputInfos);headerInfos.add(headerKV);return headerInfos;}
}

1.2 返回结果

List

[{"authorization": "Authorization","input": [{"address": "shenzhen","name": "huahua"}],"content-length": "0","postman-token": "ec660634-fd23-4828-b6ac-8b4dfcbe2a1e","host": "localhost:8080","connection": "keep-alive","cache-control": "no-cache","accept-encoding": "gzip, deflate","user-agent": "PostmanRuntime/7.2.0","accept": "*/*"}
]

{"method": "POST","context": "/ssmPureBackend","headerNamesAndValue": {"content-length": "0","postman-token": "e53604b7-051e-4089-95e3-3efc04303726","host": "localhost:8080","connection": "keep-alive","cache-control": "no-cache","accept-encoding": "gzip, deflate","user-agent": "PostmanRuntime/7.2.0","accept": "*/*"},"Auth-type": null
}

2 javaweb接收请求提数据方式

2.1 GET

参数类型	获取参数方式
URI请求参数	HttpServletRequest.getParameter(“parameter_name”)

2.2 POST

序号	参数类型	获取参数	描述
1	x-www-form-urlencode	@RequestBody variableName	传递x-www-form-urlencode数据
1	x-www-form-urlencode	@RequestParam(“variableName”) variableName	传递x-www-form-urlencode数据
2	json	HttpServletRequest.getInputStream	传递json数据
3	class-json	@RequestBody className objectName	传递class参数,解析为json
4	class-map	@RequestBody className objectName	传递class参数,赋值给Map变量
5	map	@RequestBody Map variableName	传递Map参数
6	list	@RequestBody List variableName	传递List参数

Java语言的Map，List集合,对应json形式的数据,若输入或输出json数据,将数据整合为Map结合即可.
json数据:JSON格式数据解析

2.3 获取请求体数据

2.3.1 entity/Info.java

package com.hello.entity;
import lombok.Builder;
import lombok.Data;
import lombok.experimental.Accessors;//使用lombok插件,可不用写setter和getter
@Data
@Accessors(chain = true)
@Builder
public class Info {private String name;private String sex;private String cellphone;public void setName(String name){this.name = name;}public String getName(){return name;}public void setSex(String sex){this.sex =sex;}public String getSex(){return sex;}public Info(){}public Info(String name, String sex, String cellphone){this.name = name;this.sex = sex;this.cellphone = cellphone;}
}

2.3.2 controller/HelloController.java

package com.hello;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RequestParam;import org.springframework.ui.ModelMap;
import org.springframework.ui.Model;
import javax.servlet.http.HttpServletRequest;import java.io.*;
import java.net.URLDecoder;import com.hello.entity.Info;
import java.util.Map;
import java.util.HashMap;
import java.util.List;@CrossOrigin(origins = "*", maxAge = 3600)
@Controller
@RequestMapping("/api")
public class HelloController{@RequestMapping(value="/datas", method=RequestMethod.GET)// @ResponseBodypublic String printHello(HttpServletRequest request, Model model){model.addAttribute("message", "Hello Spring MVC Framework!");// return "hello";return "hello";}/*** URI paramter received.* @param request: parameter request object* @param model: database model object* @return name: user name*/@RequestMapping(value="/get-infos", method=RequestMethod.GET)@ResponseBodypublic String returnString(HttpServletRequest request, Model model){String name = request.getParameter("name");System.out.println("name:"+name);// String address = request.getParameter("address");return name;}/*** x-www-form-urlencode parameter received.* @param name: variable* @param address: variable* @return name*/@RequestMapping(value="/post-infos", method=RequestMethod.POST)@ResponseBodypublic String returnJson(@RequestBody String name, @RequestBody String address){System.out.println("data: "+name);// String address = request.getParameter("address");return name;}public static String getType(Object o){return o.getClass().toString();}/*** Transfer json data and parse it directly.* @param request: request object* @return request body*/@RequestMapping(value="/post-json", method=RequestMethod.POST)@ResponseBodypublic String loadJson(HttpServletRequest request){BufferedReader br;StringBuilder sb = null;String reqBody = null;try{br = new BufferedReader(new InputStreamReader(request.getInputStream()));String line = null;sb = new StringBuilder();while ((line = br.readLine()) != null ){sb.append(line);}reqBody = URLDecoder.decode(sb.toString(), "UTF-8");reqBody = reqBody.substring(reqBody.indexOf("{"));request.setAttribute("inputParam", reqBody);System.out.println("JsonRequest :"+reqBody);System.out.println("Type of request data:"+getType(reqBody));return reqBody;} catch (IOException e){e.printStackTrace();return "jsonerror";}}/*** Received parameter within Class entity.* @param info: object* @return object*/@RequestMapping(value="/post-class", method=RequestMethod.POST)@ResponseBodypublic Info loadClass(@RequestBody Info info){System.out.println("info:"+info);System.out.println("info type:"+getType(info));System.out.println("name:"+info.getName());String compare_name = "hello";// info.setName("xiaohong");System.out.println("source name: "+info.getName());System.out.println("source name type: "+getType(info.getName()));if(info.getName().equals(compare_name)){info.setName("xiaohong");System.out.println("judge name: "+info.getName());}else{System.out.println("Name changed error");}System.out.println("After name changed:"+info.getName());return info; }/*** Create class and set parameter.* @return*/@RequestMapping(value="/post-class-new", method=RequestMethod.POST)@ResponseBodypublic Info classNew(){Info info = new Info();info.setSex("male");return info;}/*** Parsing json data with class entity.* @param info* @param request* @return*/@RequestMapping(value="/post-class-json", method=RequestMethod.POST)@ResponseBodypublic String classJson(@RequestBody Info info, HttpServletRequest request){request.setAttribute("test_name", info.getName());String test_name = info.getName();return test_name;}/*** Parsing json data with class entity and received with map data. * @param info* @return*/@RequestMapping(value="/post-class-map", method=RequestMethod.POST)@ResponseBodypublic Map<String, String> classMap(@RequestBody Info info){Map<String, String> datas = new HashMap<String, String>();datas.put("username", info.getName());datas.put("sex", info.getSex());System.out.println("datas:"+datas);return datas;}/*** Tranfering map data.* @param map* @return*/@RequestMapping(value="/post-map", method=RequestMethod.POST)@ResponseBodypublic String postMap(@RequestBody Map<String, String> map){String name = "hello";String sex = "male";if(map.containsKey("name")){name = map.get("name").toString();}if(map.containsKey("sex")){sex = map.get("sex").toString();}return name;}/*** Transfering list data.* @param lists* @return*/@RequestMapping(value="/post-list", method=RequestMethod.POST)@ResponseBodypublic List<Info> postList(@RequestBody List<Info> lists){for(Info info : lists){System.out.println("data:"+info.toString());}return lists;}/*** Transfering x-www-from-urlencode data.* @param name* @return*/@RequestMapping(value="/post-param", method=RequestMethod.POST)@ResponseBodypublic String postParam(@RequestParam("name") String name){System.out.println("name:"+name);return name;}
}

【参考文献】
[1]https://www.cnblogs.com/zzsuje/articles/10329948.html
[2]https://www.cnblogs.com/dwp1216/p/10381858.html
[3]https://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/http/HttpServletRequest.html

javaweb接收数据及接受方式相关推荐

STM32串口中断的4种接收数据的实现方式
本例程通过PC机的串口调试助手将数据发送至STM32,接收数据后将所接收的数据又发送至PC机. 实例一: void USART1_IRQHandler(u8 GetData) {u8 BackData ...
linux内核网络协议栈--监控和调优：接收数据（十五）
译者序本文翻译自 2016 年的一篇英文博客 Monitoring and Tuning the Linux Networking Stack: Receiving Data.如果能看懂英文,建议阅 ...
C#中POST数据和接收的几种方式
POST方式提交数据,一种众所周知的方式: html页面中使用form表单提交,接收方式,使用Request.Form[""]或Request.QueryString[" ...
Linux下TCP循环接收数据的方式
简介服务器调用accept与客户端建立连接,连接建立成功后,会返回一个fd,表示这条了连接的文件描述符.之后调用recv函数接受连接的信息.根据recv函数的原型,需要服务器程序有一个接收缓冲区,实 ...
php数据接受数据,php接收数据
PHP默认只识别application/x-www.form-urlencoded标准的数据类型. 因此,对型如text/xml 或者 soap 或者 application/octet-stream ...
STM32串口发送数据和接收数据方式总结
文章目录串口发送数据串口接受数据串口发送数据 1.串口发送数据最直接的方式就是标准调用库函数 . void USART_SendData(USART_TypeDef* USARTx, uint1 ...
MVCAction接收数据方式
1.Model接收,Model接收的好处就是会自动帮我们填充数据无论是GET方式还是post都能自动填充 2.FormCollection 只能接收From表单的值也就是只能接收POST 他的好处就 ...
php后端接收数据,后端如何接收fetch方式发送的数据？
fetch方法借助FormData对象模拟表单的请求这样能够实现完整的HTTP请求,而后端也能够像表单样接收数据 //前端 var formdata = new FormData(); formda ...
控制器中接收数据的四种方式
控制器中接收数据的四种方式: (仅限于个别的方式(get/post)有效) 通过形参的方式接收表单提交的数据(可以接收post与get提交的数据): 注释: GetData自己定义的方法名里面存入形参 ...

javaweb接收数据及接受方式