SpringMVC之综合案例：参数传递，向页面传参，页面跳转

参数传递
向页面传参
页面跳转

1.参数传递

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>ssm</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>ssm Maven Webapp</name><!-- FIXME change it to the project's website --><url>http://www.example.com</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version><!--添加jar包依赖--><!--1.spring 5.0.2.RELEASE相关--><spring.version>5.0.2.RELEASE</spring.version><!--2.mybatis相关--><mybatis.version>3.4.5</mybatis.version><!--mysql--><mysql.version>5.1.44</mysql.version><!--pagehelper分页jar依赖--><pagehelper.version>5.1.2</pagehelper.version><!--mybatis与spring集成jar依赖--><mybatis.spring.version>1.3.1</mybatis.spring.version><!--3.dbcp2连接池相关 druid--><commons.dbcp2.version>2.1.1</commons.dbcp2.version><commons.pool2.version>2.4.3</commons.pool2.version><!--4.log日志相关--><log4j2.version>2.9.1</log4j2.version><log4j2.disruptor.version>3.2.0</log4j2.disruptor.version><slf4j.version>1.7.13</slf4j.version><!--5.其他--><junit.version>4.12</junit.version><servlet.version>4.0.0</servlet.version><lombok.version>1.18.2</lombok.version><!-- jstl+standard --><jstl.version>1.2</jstl.version><standard.version>1.1.2</standard.version><!-- spring --><spring.version>5.0.2.RELEASE</spring.version><jackson.version>2.9.3</jackson.version></properties><dependencies><!--1.spring相关--><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><!--2.mybatis相关--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><!--mysql--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><!--pagehelper分页插件jar包依赖--><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper</artifactId><version>${pagehelper.version}</version></dependency><!--mybatis与spring集成jar包依赖--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>${mybatis.spring.version}</version></dependency><!--3.dbcp2连接池相关--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-dbcp2</artifactId><version>${commons.dbcp2.version}</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-pool2</artifactId><version>${commons.pool2.version}</version></dependency><!-- log4j2日志相关依赖 --><!-- log配置：Log4j2 + Slf4j --><!-- slf4j核心包--><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><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>${jackson.version}</version></dependency><!--核心log4j2jar包--><dependency><groupId>org.apache.logging.log4j</groupId><artifactId>log4j-api</artifactId><version>${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><!--5.其他--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>${junit.version}</version><!--            <scope>test</scope>--></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>${servlet.version}</version><scope>provided</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>${lombok.version}</version><scope>provided</scope></dependency><!-- spring mvc相关依赖 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>${standard.version}</version></dependency></dependencies><build><finalName>ssm</finalName><resources><!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题--><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource><!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题--><resource><directory>src/main/resources</directory><includes><include>jdbc.properties</include><include>*.xml</include></includes></resource></resources><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>${maven.compiler.plugin.version}</version><configuration><source>${maven.compiler.source}</source><target>${maven.compiler.target}</target><encoding>${project.build.sourceEncoding}</encoding></configuration></plugin><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.2</version><dependencies><!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency></dependencies><configuration><overwrite>true</overwrite></configuration></plugin><plugin><artifactId>maven-clean-plugin</artifactId><version>3.1.0</version></plugin><!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.8.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.22.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.2</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin></plugins></build>
</project>

//index.xml
<%--Created by IntelliJ IDEA.User: 朱Date: 2023/9/6Time: 12:40To 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>springmvc 雷猴</h1>
</body>
</html>

package com.zlj.web;import com.zlj.model.Book;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;import javax.servlet.http.HttpServletRequest;
import java.util.Map;/*** @author zlj* @create 2023-09-06 12:32*/
@Slf4j
@Controller
@RequestMapping("/param")
public class ParamController {@RequestMapping("/hello1")public String index(String bname,Integer bid){
//        System.out.println("hello springmvc...");log.info("简单类型参数：bname:{},bid:{}",bname,bid);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello2")public String hello2(Book book, HttpServletRequest request){
//        System.out.println("hello springmvc...");
//        servlet参数获取方式log.info("复杂类型参数：bname:{},bid:{}",request.getParameter("bname"),request.getParameter("bid"));
//        复杂传参log.info("复杂类型参数：book:{}",book.toString());
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello3")public String hello3(@RequestParam String bname,@RequestParam(required = false) Integer bid){
//        System.out.println("hello springmvc...");log.info("简单类型参数：bname:{},bid:{}",bname,bid);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello4/{bid}")public String hello4(@PathVariable("bid") Integer bid){
//        System.out.println("hello springmvc...");log.info("@pathvariable:bid:{}",bid);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello5")public String hello5(Map map){
//        System.out.println("hello springmvc...");log.info("@RequestBody：map:{}",map);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello6")public String hello6(@RequestBody Map map){
//        System.out.println("hello springmvc...");log.info("@RequestBody：map:{}",map);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello7")public String hello7(@RequestHeader("jwt") String jwt){
//        System.out.println("hello springmvc...");log.info("@RequestHeader：jwt:{}",jwt);
//        fail.. error waring info debugreturn "index";}@RequestMapping("/hello8")public String hello8(Book book,@RequestBody Map map,@RequestHeader("jwt") String jwt){
//        System.out.println("hello springmvc...");log.info("book：book:{}",book.toString());log.info("@RequestBorder：map:{}",map);log.info("@RequestHeader：jwt:{}",jwt);
//        fail.. error waring info debugreturn "index";}@GetMappingpublic String type1(@RequestBody Map map){System.out.println("getMapping...");return "index";}@PostMappingpublic String type2(@RequestBody Map map){System.out.println("postMapping...");return "index";}@PutMappingpublic String type3(@RequestBody Map map){System.out.println("putMapping...");return "index";}@DeleteMappingpublic String type4(@RequestBody Map map){System.out.println("DeleteMapping...");return "index";}//requestMapping=GetMapping+PostMapping+PutMapping+DeleteMapping
//    @RequestMapping不安全，不具备标识意义//@compontent=repository+service+controller}

注：方法如以上，hell1到hello5通过浏览器打印到控制台输出；hello6，hello7，hello8以及type1到type4用Apikit软件发送到打印台。

方法6中@requestBody需要导入依赖，上面pom.xml已经是完整版

hello6的打印方法，及结果

hello6的打印方法第二种写法

hello7及hello8的打印结果，此处不详细，可以去搜索资料看怎么熟练并应用Apikit

2.向页面传参

package com.zlj.web;import com.zlj.util.ResponseUtil;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;/*** @author zlj* @create 2023-09-06 18:20*/
@Controller
@RequestMapping("/rs")
public class ReturnController {@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();}}@ResponseBody  //响应json数据@RequestMapping("/hello2")public Map hello2(HttpServletResponse response){Map<String,Object> map=new HashMap<>();map.put("code",200);map.put("msg","成功添加。。。");return map;}@RequestMapping("/hello3")public String hello3(){return "index";}//String+mondel@RequestMapping("/hello4")public String hello4(Model model, HttpServletRequest request){model.addAttribute("currenName","永州鸭");request.setAttribute("location","道州");return "index";}//modelandView@RequestMapping("/hello5")public ModelAndView hello5(){ModelAndView mv=new ModelAndView();mv.addObject("sign","肥而不腻");mv.setViewName("index");return mv;}
}

<%--Created by IntelliJ IDEA.User: 朱Date: 2023/9/6Time: 12:40To 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>springmvc 雷猴</h1>
用户名：${currenName}
原产地：${location}
评价：${sign}
</body>
</html>

3.页面跳转(hello6,hello7,hello8,hello9)

package com.zlj.web;import com.zlj.util.ResponseUtil;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;/*** @author zlj* @create 2023-09-06 18:20*/
@Controller
@RequestMapping("/rs")
public class ReturnController {@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();}}@ResponseBody  //响应json数据@RequestMapping("/hello2")public Map hello2(HttpServletResponse response) {Map<String, Object> map = new HashMap<>();map.put("code", 200);map.put("msg", "成功添加。。。");return map;}@RequestMapping("/hello3")public String hello3() {return "index";}//String+mondel@RequestMapping("/hello4")public String hello4(Model model, HttpServletRequest request) {model.addAttribute("currenName", "永州鸭");request.setAttribute("location", "道州");return "index";}//modelandView@RequestMapping("/hello5")public ModelAndView hello5() {ModelAndView mv = new ModelAndView();mv.addObject("sign", "肥而不腻");mv.setViewName("index");return mv;}// 场景一：转发到后台的某一个方法（当前类）@RequestMapping("/hello6")public String hello6() {System.out.println("helo6...");return "forward:hello2";}// 场景二：转发到后台的某一个方法（其他类）@RequestMapping("/hello7")public String hello7() {System.out.println("hello7...");return "forward:/param/hello1";}// 场景三：重定向到后台的某一个方法（当前类）@RequestMapping("/hello8")public String hello8() {System.out.println("helo8...");return "redirect:hello2";}// 场景四：重定向到后台的某一个方法（其他类）@RequestMapping("/hello9")public String hello9() {System.out.println("hello9...");return "redirect:/param/hello1";}}