springboot+mybatis项目搭建

 

一．idea创建一个springBoot项目

二．创建的目录结构

三．Pom.xml文件

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springbootdemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springbootdemo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--添加mybatis依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>

        <!--添加mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.1.3.RELEASE</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

四．application.properties文件#修改tomcat端口号

server.port=8088

#配制mysql数据库映射

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/yz?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT

spring.datasource.username=root

spring.datasource.password=yzltz_0324

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver


#配制mapper映射文件

mybatis.mapper-locations=classpath:/mappers/*.xml

五．SpringbootdemoApplication.java启动文件package com.example.springbootdemo;import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;



@SpringBootApplication

@MapperScan(basePackages = "com.example.springbootdemo.mapper.SpringBootTestMapper")

public class SpringbootdemoApplication extends SpringBootServletInitializer {

    public static void main(String[] args) {

        SpringApplication.run(SpringbootdemoApplication.class, args);

    }

}

六．Controllerimport java.util.List;

@RestController

public class SpringBootTest {





    @RequestMapping("/home")

    public String home() {

        return "Hello Spring Boot!";

    }



    @Autowired

    private SpringBootTestService springBootTestService;



    @RequestMapping("/testList")

    public List<SpringBootTestPojo> getTestList(){

        List<SpringBootTestPojo> list=springBootTestService.getTestList();

        return list;

    };

}

七．Service

接口

public interface SpringBootTestService {

    public List<SpringBootTestPojo> getTestList();

}

实现类

import java.util.List;

@Service

public class SpringBootTestServiceImpl implements SpringBootTestService {

    @Autowired

    private SpringBootTestMapper springBootTestMapper;

    @Override

    public List<SpringBootTestPojo> getTestList() {

        List<SpringBootTestPojo> list=springBootTestMapper.getTestList();

        return list;

    }

}

八．Mapper

import java.util.List;

@Mapper

public interface SpringBootTestMapper {

    public List<SpringBootTestPojo> getTestList();

}

九．Mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPEmapperPUBLIC"-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="com.example.springbootdemo.mapper.SpringBootTestMapper">

    <select id="getTestList" resultType="com.example.springbootdemo.pojo.SpringBootTestPojo">

        SELECT * FROM `tb_springboot`

    </select>

</mapper>