目录
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)
2.正式操作
1.基础传参
1.1创建方法,用于验证传参
1.2构建界面回显
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
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
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
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
6.2创建方法用于验证
6.3通过aplikt测试
6.4补充
7.@RequestHeader(获取请求头)
7.1创建方法用于验证
7.2设置访问路径(localhost:8080/param/hello7)
8.复合行
二.返回值
1.void型
2.String+model类型
3.ModelAndView
三.页面跳转
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。
2.9.1
3.2.0
1.7.13
org.slf4j
slf4j-api
${slf4j.version}
org.slf4j
jcl-over-slf4j
${slf4j.version}
runtime
org.apache.logging.log4j
log4j-api
${log4j2.version}
org.apache.logging.log4j
log4j-core
${log4j2.version}
org.apache.logging.log4j
log4j-slf4j-impl
${log4j2.version}
org.apache.logging.log4j
log4j-web
${log4j2.version}
runtime
com.lmax
disruptor
${log4j2.disruptor.version}
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";
}
}
<%--
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" %>
Title
刘兵最喜欢吃锅巴
@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";
}
@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";
}
@RequestMapping("/hello4/{bid}")
public String hello4(@PathVariable("bid") Integer bid){
log.info("简单类型参数:bid:{}",bid);
return "index";
}
2.9.3
com.fasterxml.jackson.core
jackson-databind
${jackson.version}
com.fasterxml.jackson.core
jackson-core
${jackson.version}
com.fasterxml.jackson.core
jackson-annotations
${jackson.version}
@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";
}
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";
}
@RequestMapping("/hello7")
public String hello6(@RequestHeader("jwt") String jwt){
log.info("@RequestBody:jwt:{}",jwt);
return "index";
}
@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";
}
@RequestMapping("/hello1")
public void hello1(HttpServletResponse response){
Map map=new HashMap<>();
map.put("code",200);
map.put("msg","成功添加");
try {
ResponseUtil .writeJson(response,map);
} catch (Exception e) {
e.printStackTrace();
}
}
@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";
}
@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;
}
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。
path为请求处理方法名,而非逻辑视图名。
转发(地址栏不变)
@RequestMapping("/hello1")
public String hello1(){
System.out.println("hell1");
return "forward:index";
}
它相当于“request.getRequestDispatcher("url").forward(request,response)”。使用转发,既可以转发到jsp, 也可以转发到其他的控制器方法。
重定向(地址栏改变)
@RequestMapping("/hello2")
public String /hello2(){
System.out.println("/hello2");
return "redirect:index";
}
它相当于“response.sendRedirect(url)”。需要注意的是,如果重定向到jsp页面,则jsp页面不能写在WEB-INF目录中,否则无法找到。