前言

笔者在学习的时候发现，为什么每次都要手动去配置Tomcat，我能不能不配啊？所以笔者参考了SpringBoot框架的开发思想，想到了使用内嵌式Tomcat，经过笔者查询大量的资料，最终实现了，那么我们接下来就一起看看怎么实现！

技术栈

JDK17

Apache-tomcat-10.1.6

Spring-6.0.0

SpringMVC-6.0.0

MyBatis-3.5.6

MySQL Driver-8.0.27

本项目源码：https://gitee.com/mumangguo/embed-tomcat-ssm，有需要的自取！

具体实现

1. 创建普通Maven工程，不需要创建Maven的Web工程

2. 引入相关依赖，并在properties标签中指定公共版本号

     6.0.010.1.6org.apache.tomcat.embedtomcat-embed-core${embed.tomcat.version}org.apache.tomcat.embedtomcat-embed-jasper${embed.tomcat.version}junitjunit3.8.1testorg.springframeworkspring-core${spring.version}org.springframeworkspring-beans${spring.version}org.springframeworkspring-aop${spring.version}org.springframeworkspring-context${spring.version}org.springframeworkspring-context-support${spring.version}org.springframeworkspring-jdbc${spring.version}org.springframeworkspring-web${spring.version}org.springframeworkspring-webmvc${spring.version}com.alibabadruid1.1.12mysqlmysql-connector-java8.0.27org.mybatismybatis3.5.6org.mybatismybatis-spring3.0.1com.fasterxml.jackson.corejackson-databind2.9.3org.aspectjaspectjweaver1.9.5org.aspectjaspectjrt1.9.5

3. 在resources目录下新建一个名为WEB-INF的目录，在此目录下创建一个web.xml文件，并写入以下内容

目录结构：

Archetype Created Web ApplicationcontextConfigLocationclasspath:config/spring.xmlorg.springframework.web.context.ContextLoaderListenerspringmvcorg.springframework.web.servlet.DispatcherServletcontextConfigLocationclasspath:config/springmvc.xmlspringmvc/

4. 在resouces目录下新建一个config目录用来管理spring相关配置文件，具体内容如下

目录结构：

jdbc.properties

jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.username=root
jdbc.password=admin

MyBatis-Config.xml

spring.xml

springmvc.xml

5. 编写Tomcat启动类

package com.mmg;import org.apache.catalina.Context;
import org.apache.catalina.WebResourceRoot;
import org.apache.catalina.startup.Tomcat;
import org.apache.catalina.webresources.DirResourceSet;
import org.apache.catalina.webresources.StandardRoot;import java.io.File;/*** 通过TomcatStarter启动该项目即可* @author mmg*/
public class TomcatStarter {public static void main(String[] args) throws Exception {// 启动 tomcatTomcat tomcat = new Tomcat();tomcat.setPort(Integer.getInteger("port", 8080));tomcat.getConnector();// 创建 WebAppContext context = tomcat.addWebapp("", new File("src/main/resources").getAbsolutePath());WebResourceRoot resources = new StandardRoot(context);resources.addPreResources(new DirResourceSet(resources, "/WEB-INF/classes",new File("target/classes").getAbsolutePath(), "/"));context.setResources(resources);tomcat.start();tomcat.getServer().await();}
}

6. 编写实体类，包名为com.mmg.entity，文件名为Users

package com.mmg.entity;/*** 实体类*/
public class Users {private Integer id;private String username;private String birthday;private Integer sex;private String address;public Users() {}public Users(String username, String birthday, Integer sex, String address) {this.username = username;this.birthday = birthday;this.sex = sex;this.address = address;}public Users(Integer id, String username, String birthday, Integer sex, String address) {this.id = id;this.username = username;this.birthday = birthday;this.sex = sex;this.address = address;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getBirthday() {return birthday;}public void setBirthday(String birthday) {this.birthday = birthday;}public Integer getSex() {return sex;}public void setSex(Integer sex) {this.sex = sex;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}@Overridepublic String toString() {return "Users{" +"id=" + id +", username='" + username + '\'' +", birthday='" + birthday + '\'' +", sex=" + sex +", address='" + address + '\'' +'}';}
}

7. 编写dao层，包名为com.mmg.dao，文件名为UsersDao

package com.mmg.dao;import com.mmg.entity.Users;
import org.apache.ibatis.annotations.Param;import java.util.List;public interface UsersDao {/*** 分页查询*/List selectByPage(@Param("page") Integer page, @Param("pageSize") Integer pageSize);/*** 根据id查询*/Users selectById(Integer id);/*** 查询所有用户*/List selectAll();/*** 新增*/int insert(Users users);/*** 删除*/int delete(Integer id);/*** 更新*/int update(Users user);
}

8. 编写mapper映射文件，在resources目录下新建mapper目录，用来存放mapper映射

目录结构：

 insert into users values (null,#{username},#{birthday},#{sex},#{address})update t_user set username=#{username},birthday=#{birthday},sex=#{sex},address=#{address} where id=#{id}delete from users where id=#{id}select * from usersselect * from users limit #{page},#{pageSize}select * from users where id=#{id}

9. 编写service层和service实现层，包名为com.mmg.service和com.mmg.service.impl

UsersService.java

package com.mmg.service;import com.mmg.entity.Users;import java.util.List;public interface UsersService {/*** 分页查询*/List selectByPage(Integer page, Integer pageSize);/*** 根据id查询*/Users selectById(Integer id);/*** 查询所有用户*/List selectAll();/*** 新增*/int insert(Users users);/*** 删除*/int delete(Integer id);/*** 更新*/int update(Users users);
}

UsersServiceImpl.java

package com.mmg.service.impl;import com.mmg.dao.UsersDao;
import com.mmg.entity.Users;
import com.mmg.service.UsersService;
import org.apache.catalina.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;import java.util.List;@Transactional //开启事务
@Service //将UsersServiceImpl交给Spring管理，默认类名首字母小写
public class UsersServiceImpl implements UsersService {private UsersDao usersDao;//使用构造注入@Autowiredpublic UsersServiceImpl(UsersDao usersDao) {this.usersDao = usersDao;}@Overridepublic List selectByPage(Integer page, Integer pageSize) {page = (page - 1) * pageSize;return usersDao.selectByPage(page, pageSize);}@Overridepublic Users selectById(Integer id) {return usersDao.selectById(id);}public List selectAll() {return usersDao.selectAll();}public int insert(Users users) {return usersDao.insert(users);}@Overridepublic int delete(Integer id) {return usersDao.delete(id);}@Overridepublic int update(Users users) {return usersDao.update(users);}
}

10. 编写Controller层，包名为com.mmg.controller

package com.mmg.controller;import com.mmg.entity.Users;
import com.mmg.service.UsersService;
import jakarta.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import java.util.List;@RestController //代表类中返回值转换为json响应到浏览器
@RequestMapping("/users") //代表访问路径，通过/users访问
public class UsersController {@Resourceprivate UsersService usersService;/***  API=http://localhost:8080/users/{page}/{pageSize}*/@GetMapping("/{page}/{pageSize}")public List getUsersByPage(@PathVariable("page") Integer page, @PathVariable("pageSize") Integer pageSize) {return usersService.selectByPage(page, pageSize);}/*** API=http://localhost:8080/users/{id}*/@GetMapping("/{id}")public Users getUsersById(@PathVariable("id") Integer id) {return usersService.selectById(id);}/*** API=http://localhost:8080/users* 参数：无*/@GetMapping("") //get请求的访问路径public List getAllUsers() {return usersService.selectAll();}/*** API=http://localhost:8080/users/add* 参数：* {* "username": "木芒果",* "birthday": "2003-12-22",* "sex": 2,* "address": "湖南"* }*/@PostMapping("/add") //post请求的访问路径public String addUsers(@RequestBody Users users) {int count = usersService.insert(users);if (count == 1) {return "success";}return "fail";}/*** API=http://localhost:8080/users/{id}*/@DeleteMapping("/{id}") //delete请求的访问路径public String deleteUsers(@PathVariable("id") Integer id) {int count = usersService.delete(id);if (count == 1) {return "success";}return "fail";}/*** API=http://localhost:8080/users* 参数：* {* "username": "木芒果",* "birthday": "2003-12-22",* "sex": 2,* "address": "湖南"*/@PutMapping("") //put请求的访问路径public String updateUsers(@RequestBody Users users) {int count = usersService.update(users);if (count == 1) {return "success";}return "fail";}
}

11. 在resources目录下新建一个index.jsp供显示

目录结构：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


Hello World!
查看所有用户查看用户1分页查看

12. 到此代码全部写完，我们通过启动TomcatStarter类完成项目的启动！

总结

1. 总体来说还是比较简单的，主要用到了Tomcat底层相关知识

2. 如果你有更好的想法可以评论在下方哦！笔者水平有限...

3. 如果不想看长篇的教程，可以直接拉取本项目自行查询