springboot+mybaties

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1.　　开发工具：Intellij idea2018.3

2.　　file----->new----->project

3.　　选择Spring Initializr,点击next

4.　　点击next

5.　　web中选择web，SQL中选择JAP/MySQL/JDBC,点击next

6.　　输入项目名称，选择存储路径，点击finish

7.　　application.properties配置文件

spring.datasource.url=jdbc:mysql://*********:3306/pmis

spring.datasource.username=root

spring.datasource.password=******

spring.datasource.driverClassName=com.mysql.jdbc.Driver

#页面热加载

spring.thymeleaf.cache=false

server.port=

8.　　mapper类，需要加注解@Repository

package com.example.mapper;

import com.example.model.UserModel;

import org.apache.ibatis.annotations.Select;

import org.springframework.stereotype.Repository;

@Repository

public interface UserMapper {

    @Select("select * from wx_config where id=#{id}")

    UserModel selectById(int id);

}

9.　　启动类需要加注解@MapperScan("com.example.mapper"),用来扫描mapper文件,需要注意的是：启动类需要和controller/entity/mapper/service包同级！！！

package com.example;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@MapperScan("com.example.mapper")

@SpringBootApplication

public class DemoApplication {

    public static void main(String[] args) {

        SpringApplication.run(DemoApplication.class, args);

    }

}

10.　　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.</modelVersion>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0..RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <groupId>com.example</groupId>

    <artifactId>demo</artifactId>

    <version>0.0.-SNAPSHOT</version>

    <name>demo</name>

    <description>Demo project for Spring Boot</description>

    <properties>

        <project.build.sourceEncoding>UTF-</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-</project.reporting.outputEncoding>

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

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-jdbc</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.mybatis.spring.boot</groupId>

            <artifactId>mybatis-spring-boot-starter</artifactId>

            <version>1.3.</version>

        </dependency>

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <version>5.1.</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <!--<dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <scope>runtime</scope>

        </dependency>-->

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->

        <!--<dependency>

            <groupId>org.mybatis.spring.boot</groupId>

            <artifactId>mybatis-spring-boot-starter</artifactId>

            <version>1.3.</version>

        </dependency>-->

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>