先搞一波效果图
1.Controller
package com.tz.controller; import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Required;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam; import com.tz.domain.Course; @Controller
public class RequestController {
/**
* @PathVariable("user"):获取路径中的值/handler/{user}
* @RequestParam("user"):获取请求参数/hander/{user}?user=coco
*
* @param userName
* @return
*/
@RequestMapping("/handle")
public String handler(@RequestParam(value="user",required=false) String userName){
//userName = request.getParameter("user");
System.out.println(userName);
return "success";
} @RequestMapping("/handle2")
public String handler02(@RequestParam(value="user",required=false,defaultValue="你没有带参数") String userName,
@RequestHeader(value="User-Agent",required=false) String user_Agent,
@CookieValue("JSESSIONID") String js){
//userName = request.getParameter("user");
System.out.println(userName);
System.out.println(user_Agent);
System.out.println(js);
return "success";
} /**
* springmvc可以在参数上写servlet常用的api
* HttpServletRequest
* HttpServletResponse
* Httpsession
*
* InputStream:request.getInputStream();
* OutputStream:response.getOutputStream();
* Reader:request.getReader();
* Writer:response.getWriter();
*
* 请求:客户端-->服务端(客户端显示乱码)
* 修改tomcat配置文件
* GET有效
* <Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>
* 第一次获取请求参数之前:request.setCharacterEncoding("UTF-8");
*
* 响应:服务端-->客户端(服务端显示乱码)
* reponse.setContentType("text/html;charset=utf-8");
* @param c
* @return
*/
@RequestMapping("/addCourse")
public String addCourse(Course c){//springMVC会自动为我们定义的类型进行赋值
/**
* 1.将对象中的每一个属性从request参数中尝试取出来,并进行封装
* request.getParameter("参数名");如果有值,就会取出来封装到实体类的属性中(调用set方法)
*/
System.out.println(c);
return "success";
} @RequestMapping("/handle04")
public String handle04(HttpSession session,HttpServletRequest request){
session.setAttribute("session","session域");
request.setAttribute("request","request域");
return "success";
} }
2.配置文件web.xml(最重要的就是设置那个字符编码过滤器)
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>springmvc_Day01</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list> <servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- <init-param>
<param-name>contextConfigLocation</param-name>
指定springmvc配置文件的位置
<param-value>classpath:springmvc.xml</param-value>
</init-param> -->
<!-- 如果在web.xml不指定文件位置，也会找默认的文件
/WEB-INF/xxx-servlet.xml
-->
<!-- 启动加载时期 -->
<!-- servlet是当服务器启动的时候加载创建对象，值越小，代表优先级越高，就越先创建对象 -->
<!-- <init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param> -->
<!-- 如果在web.xml中找不到文件位置，也会默认找文件
/WEB-INF/xxx-servlet.xml
-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
<!--
/和/*都是用来拦截所有请求，但是/*的范围更大，还会拦截到*.jsp请求，一旦拦截，则访问jsp页面就不会显示了
/也会拦截所有请求，但是不会拦截.jsp,可以保证jsp页面访问正常 *.do *.action *.hah
/:不拦截jsp *.jsp
/*:拦截jsp
-->
</servlet-mapping> <!-- 配置字符编码过滤器 保证该过滤器在所有的过滤器之前，避免请求后拦截不了
最好在第一个
-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!-- encoding:指定解决请求乱码
forceRequestEncoding:指定请求与响应的编码集格式为eccoding
forceResponseEncoding
-->
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>forceResponseEncoding</param-name>
<param-value>true</param-value>
</init-param> </filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> <!-- reset风格的请求
get 查询
put 请求修改
delect删除
post新增
-->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<!-- 这里将.jsp也过滤掉 -->
<url-pattern>/*</url-pattern>
</filter-mapping> </web-app>