SpringBoot整合SSM

1. SSM整合步骤

今天带大家学习一下基于SpringBoot的SSM整合案例，话不多说，咱们开始，要实现SSM整合，有以下这么几步

导入依赖
创建yml配置文件
dao层
静态页面
测试类进行测试

1.1 导入依赖

<?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">
<!--    <parent>-->
<!--        <artifactId>springdemo</artifactId>-->
<!--        <groupId>org.example</groupId>-->
<!--        <version>1.0-SNAPSHOT</version>-->
<!--    </parent>--><modelVersion>4.0.0</modelVersion><artifactId>boot</artifactId><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target></properties><!--    引入SpringBoot父级依赖  --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.3.4</version></parent><dependencies><!--       SpringBoot 整合springmvc依赖     --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency>
<!--        mysql   --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.33</version></dependency>
<!--    整合jdbc    --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId><version>2.7.3</version></dependency>
<!--       整合mybatis     --><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-spring-boot3-starter</artifactId><version>3.5.7</version></dependency><!--      整合druid     --><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-3-starter</artifactId><version>1.2.23</version></dependency>
<!--        junit测试 +springboot    --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><version>3.3.5</version><scope>test </scope></dependency>
<!--        lombok     --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.26</version></dependency><!-- JUnit 4 测试框架依赖，用于编写和运行单元测试 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency></dependencies>
</project>

1.2 application.yml配置文件整合mysql

# 启动端口号
server:port: 8080spring:# 整合 mysql数据源 连接池datasource:driver-class-name: com.mysql.jdbc.Driverurl: jdbc:mysql:///db1username: rootpassword: 1234type: com.alibaba.druid.pool.DruidDataSource

1.3 写业务

pojo

package com.it.pojo;import lombok.Data;@Data
public class Dept {private int id;private String dname;private String loc;
}

mapper

package com.it.mapper;import com.it.pojo.Dept;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;//动态扫描代理
@Mapper
public interface DeptMapper {@Select("select * from dept where id=#{id}")public Dept findById(int id);
}

1.4 测试

package com.it.mapper;import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;@SpringBootTest
class DeptMapperTest {@Autowiredpublic DeptMapper deptMapper;@Testvoid findById() {System.out.println(deptMapper.findById(1));}
}

1.5 service

package com.it.service;import com.it.pojo.Dept;public interface DeptService {public Dept findById(int id);
}

1.6 Impl层

package com.it.service.impl;import com.it.mapper.DeptMapper;
import com.it.pojo.Dept;
import com.it.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class DeptServiceImpl implements DeptService {@Autowiredpublic DeptMapper deptMapper;@Overridepublic Dept findById(int id) {return deptMapper.findById(id);}
}

1.7 controller层

package com.it.controller;import com.it.pojo.Dept;
import com.it.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;@Controller
public class DeptController {@Autowiredprivate DeptService  deptService;//    一个方法就是一个servlet@RequestMapping("/getList")@ResponseBodypublic Dept getList(int id){Dept dept = deptService.findById(id);System.out.println(dept);return dept;}}