SpringBoot整合MyBatis

各位應該都瞭解SSH和SSM工程搭建時候須要各類配置代碼，還要Tomcat配置，很是麻煩

如今好了，SpringBoot來解救你們了，它默認使用了各類經常使用的配置，並且內嵌了Tomcat（你沒聽錯！就是內嵌了Tomcat，連Tomcat都不用配置了）。SpringBoot是基於約定的，因此不少配置都有默認值，但若是想使用本身的配置替換默認配置的話，就能夠使用application.properties或者application.yml（application.yaml）進行配置

先來搭建一個SpringBoot工程吧！

點擊啓動，搞定！

下面咱們來整合SpringBoot和MyBatis

工程結構

pom.xml

<?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>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.jinkejoy</groupId>
    <artifactId>springboot_mybatis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot_mybatis</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-web</artifactId>
        </dependency>

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

        <!--mybatis起步依賴-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.1</version>
        </dependency>

        <!--MySql鏈接驅動-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

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

</project>

application.properties

#數據庫鏈接信息 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://127.0.0.1:3306/ssm?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8
spring.datasource.username=root spring.datasource.password=1234 #配置mybatis的信息 #spring集成mybatis環境 #pojo別名掃描包 mybatis.type-aliases-package=com.jinkejoy.domain #加載mybatis映射文件 mybatis.mapper-locations=classpath:mapper/*Mapper.xml

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.jinkejoy.mapper.UserMapper">
    <select id="queryUserList" resultType="user"> select * from user </select>
</mapper>

java代碼

package com.jinkejoy.controller; import com.jinkejoy.domain.User; import com.jinkejoy.mapper.UserMapper; 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; import java.util.List; @Controller public class MybatisController { @Autowired private UserMapper userMapper; @RequestMapping("/query") @ResponseBody public List<User> queryUserList() { List<User> users = userMapper.queryUserList(); return users; } }

package com.jinkejoy.domain; public class User { private Integer id; private String username; private String password; private String name; 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 getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", name='" + name + '\'' +
                '}'; } }

package com.jinkejoy.mapper; import com.jinkejoy.domain.User; import org.apache.ibatis.annotations.Mapper; import java.util.List; @Mapper public interface UserMapper { public List<User> queryUserList(); }

package com.jinkejoy; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringbootMybatisApplication { public static void main(String[] args) { SpringApplication.run(SpringbootMybatisApplication.class, args); } }

而後直接跑出效果

集成Junit單元測試

package com.jinkejoy; import com.jinkejoy.domain.User; import com.jinkejoy.mapper.UserMapper; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import java.util.List; @RunWith(SpringRunner.class) @SpringBootTest(classes = SpringbootMybatisApplication.class) public class MyBatisTest { @Autowired private UserMapper userMapper; @Test public void test() { List<User> users = userMapper.queryUserList(); System.out.println(users); } }

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