- 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: 2023/9/6 Time: 12:40 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>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 debug return "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 debug return "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 debug return "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 debug return "index"; } @RequestMapping("/hello5") public String hello5(Map map){ // System.out.println("hello springmvc..."); log.info("@RequestBody：map:{}",map); // fail.. error waring info debug return "index"; } @RequestMapping("/hello6") public String hello6(@RequestBody Map map){ // System.out.println("hello springmvc..."); log.info("@RequestBody：map:{}",map); // fail.. error waring info debug return "index"; } @RequestMapping("/hello7") public String hello7(@RequestHeader("jwt") String jwt){ // System.out.println("hello springmvc..."); log.info("@RequestHeader：jwt:{}",jwt); // fail.. error waring info debug return "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 debug return "index"; } @GetMapping public String type1(@RequestBody Map map){ System.out.println("getMapping..."); return "index"; } @PostMapping public String type2(@RequestBody Map map){ System.out.println("postMapping..."); return "index"; } @PutMapping public String type3(@RequestBody Map map){ System.out.println("putMapping..."); return "index"; } @DeleteMapping public 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: 2023/9/6 Time: 12:40 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>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"; } }
