Comprehensive case of SpringMVC: parameter passing, passing parameters to the page, page jump

Mobile 2023-09-30 19:24:27 views: null
  • Parameter passing
  • Pass parameters to the page
  • Page jump

1.Parameter passing

<?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


}

Note: The method is as above, hell1 to hello5 are printed to the console output through the browser; hello6, hello7, hello8 and type1 to type4 are sent to the print station using Apikit software.

In method 6, @requestBody needs to import dependencies, and the above pom.xml is already a complete version.

 hello6 printing method and results

 The second way to write the printing method of hello6

The printing results of hello7 and hello8 are not detailed here. You can search for information to see how to become proficient and use Apikit.

2. Pass parameters to the page

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. Page jump (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";
    }

}

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