目录
1.1将log4j替换成为slf4j(将打印语句替换成为日志文件输出结果)
1.3设置访问路径（localhost：8080/param/hello1?bname=狂飙&bid=2）
2.2设置访问路径（localhost：8080/param/hello2?bname=狂飙&bid=2）
3.2设置访问路径（localhost：8080/param/hello3?bname=狂飙&bid=2）
4.2设置访问路径（localhost：8080/param/hello4/2）
6.RequestBody传参（专门用来接收json字符串）
7.2设置访问路径（localhost：8080/param/hello7）
前言：
小编带大家了解了，spring mvc 以及spring mvc的入门和配置spring mvc的环境以及对于静态子资源的处理。
一. 参数传递
1.前期准备工作（替换pom.xml中的部分依赖）
1.1将log4j替换成为slf4j(将打印语句替换成为日志文件输出结果)
<log4j2.version>2.9.1</log4j2.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<slf4j.version>1.7.13</slf4j.version><dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--用于与slf4j保持桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
<scope>runtime</scope>
</dependency>
<!--需要使用log4j2的AsyncLogger需要包含disruptor-->
<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>${log4j2.disruptor.version}</version>
</dependency>2.正式操作
1.基础传参
1.1创建方法，用于验证传参
package com.lz.web;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* @author lz
* @create 2023-09-05 14:42
*/
@Controller
@Slf4j
@RequestMapping("/param")
public class ParmController {
@RequestMapping("/hello1 ")
public String index(String bname,Integer bid){
log.info("简单类型参数：bname：{},bid:{}",bname,bid);
return "index";
}
}
1.2构建界面回显
<%--
Created by IntelliJ IDEA.
User: lzzxq
Date: 2023/9/5
Time: 14:44
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>刘兵最喜欢吃锅巴</h1>
</body>
</html>
1.3设置访问路径（localhost：8080/param/hello1?bname=狂飙&bid=2）
3.复杂类型
2.1创建方法用于验证
@RequestMapping("/hello2")
public String hello2(Book book, HttpServletRequest request){
log.info("复杂类型参数：bname：{},bid:{}",
request.getParameter("bname"),
request.getParameter("bid"));
log.info("复杂类型参数：book:{}",
book.toString() );
return "index";
}2.2设置访问路径（localhost：8080/param/hello2?bname=狂飙&bid=2）
4.RequestParam注解传递参数
3.1创建方法用于验证
@RequestMapping("/hello3")
public String toHello3(@RequestParam Integer bid,
@RequestParam(required = false,value = "price") Integer bookPrice,
@RequestParam("bookName") String bname){
log.info(">>>> 使用@RequestParam注解传递参数：{},{},{}", bid,bname,bookPrice);
return "index";
}3.2设置访问路径（localhost：8080/param/hello3?bname=狂飙&bid=2）
5.路径传参
4.1创建方法用于验证
@RequestMapping("/hello4/{bid}")
public String hello4(@PathVariable("bid") Integer bid){
log.info("简单类型参数：bid:{}",bid);
return "index";
}4.2设置访问路径（localhost：8080/param/hello4/2）
6.RequestBody传参（专门用来接收json字符串）
6.1导入依赖
<jackson.version>2.9.3</jackson.version>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>6.2创建方法用于验证
@RequestMapping("/hello5")
public String hello5(Map map){
log.info("@RequestBody：map:{}",map);
return "index";
}
@RequestMapping("/hello6")
public String hello6(@RequestBody Map map){
log.info("@RequestBody：map:{}",map);
return "index";
}
6.3通过aplikt测试
6.4补充
reqiuestmapper(不安全，不具备标识意义)+=GetMapping+DeleteMappin+PutMapping+PostMapping
//增加
@PostMapping
public String type1(){
System.out.println("PostMapping");
return "index";
}
//修改
@PutMapping
public String type2(){
System.out.println("PutMapping");
return "index";
}
//输出
@DeleteMapping
public String type3(){
System.out.println("PutMapping");
return "index";
}
@GetMapping
public String type4 (){
System.out.println("PutMapping");
return "index";
}
7.@RequestHeader（获取请求头）
7.1创建方法用于验证
@RequestMapping("/hello7")
public String hello6(@RequestHeader("jwt") String jwt){
log.info("@RequestBody：jwt:{}",jwt);
return "index";
}7.2设置访问路径（localhost：8080/param/hello7）
8.复合行
@RequestMapping("/hello8")
public String hello8(
Book book,
@RequestBody Map map,
@RequestHeader("jwt") String jwt){
log.info("@RequestBody：book:{}",book);
log.info("@RequestBody：map:{}",map);
log.info("@RequestBody：jwt:{}",jwt);
return "index";
} 
二.返回值
1.void型
@RequestMapping("/hello1")
public void hello1(HttpServletResponse response){
Map<String,Object> map=new HashMap<>();
map.put("code",200);
map.put("msg","成功添加");
try {
ResponseUtil .writeJson(response,map);
} catch (Exception e) {
e.printStackTrace();
}
}
2.String+model类型
@RequestMapping("/hello4")
public String hello5(Model model, HttpServletRequest request){
model.addAttribute("currentName","永州鸭");
request.setAttribute("location","来自于道州的");
return "index";
}
3.ModelAndView
@RequestMapping("/hello5")
public ModelAndView hello5(){
ModelAndView mv = new ModelAndView();
//填充模型数据
mv.addObject("sign","头脑灵范...");
mv.setViewName("index");
//逻辑视图名
return mv;
} 
三.页面跳转
转发（forward:path）和重定向（redirect:path）这两种跳转方式将会绕开视图解析器的前缀和后缀；还有就是如果是在同一controller中则不用使用"/"从根目录开始,而如果是在不同的controller则一定要从根目录开始。
-
转发（地址栏不变）
@RequestMapping("/hello1")
public String hello1(){
System.out.println("hell1");
return "forward:index";
}-
重定向（地址栏改变）
@RequestMapping("/hello2")
public String /hello2(){
System.out.println("/hello2");
return "redirect:index";
}
