Spring Boot集成Mybatis的實例代碼(簡潔版)

概述

現在互聯網應用中,大部分還是使用Mybatis來操作數據庫的,本文介紹一下Spring Boot中如何集成Mybatis。

上篇介紹了Spring Boot 直接用jar運行項目的方法，需要的朋友點擊查看。

創建Spring Boot工程

在Spring Boot 開篇-創建和運行一文中有一個小節介紹瞭如何使用Spring Boot的組件來創建工程。如果要集成Mybatis,只需要把Mysql和Mybatis這兩個組件勾選一下即可。

當然也可以不通過這種方式,直接在POM.xml文件中添加依賴也是可以的。我選擇的是直接在POM.xml文件中直接添加依賴這種方式。

 dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version></dependency><dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version></dependency><dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.7</version></dependency>

數據源使用阿里的druid。完整的POM.xml文件內容如下:

 <?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> <groupId>com.springboot</groupId> <artifactId>study</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>study</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.10.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.7</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.45</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>

創建table

 CREATE TABLE `user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `name` varchar(30) NOT NULL DEFAULT '', PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8 COMMENT='user信息';

創建entity

 package com.springboot.entity;public class User { private Long id; private String name; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '/'' + '}'; }}

創建Mybatis映射文件和repo

UserRepo.java

 package com.springboot.repo;import com.springboot.entity.User;import org.apache.ibatis.annotations.Mapper;import org.springframework.stereotype.Component;import java.util.List;@Component@Mapperpublic interface UserRepo { int insert(User user); User selectByPrimaryKey(Long id); int updateByPrimaryKey(User user); int deleteByPrimaryKey(Long id); List<User> selectAll();}

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.springboot.repo.UserRepo" > <resultMap id="BaseResultMap" type="com.springboot.entity.User" > <id column="id" property="id" jdbcType="BIGINT" /> <result column="name" property="name" jdbcType="VARCHAR" /> </resultMap> <sql id="Base_Column_List" > id, name </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" > select <include refid="Base_Column_List" /> from user where id = #{id,jdbcType=BIGINT} </select> <select id="selectAll" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from user </select> <update id="updateByPrimaryKey" parameterType="com.springboot.entity.User" > update user <set> <if test="name != null" > `name`= #{name,jdbcType=VARCHAR}, </if> </set> where id = #{id,jdbcType=BIGINT} </update> <delete id="deleteByPrimaryKey" parameterType="java.lang.Long" > delete from user where id = #{id,jdbcType=BIGINT} </delete> <insert id="insert" parameterType="com.springboot.entity.User" useGeneratedKeys="true" keyProperty="id"> insert into user <trim prefix="(" suffix=")" suffixOverrides="," > name </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > #{name,jdbcType=VARCHAR} </trim> </insert></mapper>

編寫application.properties

在Spring Boot為我們生成的application.properties文件中添加如下內容：

 spring.datasource.name=spring_boot_study spring.datasource.url=jdbc:mysql://localhost:3306/test spring.datasource.username=root spring.datasource.password=xxxxxx spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.type=com.alibaba.druid.pool.DruidDataSource mybatis.mapper-locations=classpath:mapper/*.xml mybatis.type-aliases-package=com.springboot.entity

單元測試

package com.springboot;import com.springboot.entity.User;import com.springboot.repo.UserRepo;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)@SpringBootTestpublic class UserTest { @Autowired private UserRepo userRepo; @Test public void testInsert() { User user = new User(); user.setName("test2"); userRepo.insert(user); } @Test public void testUpdate() { User user = new User(); user.setId(6L); user.setName("test3"); userRepo.updateByPrimaryKey(user); } @Test public void testDelete() { userRepo.deleteByPrimaryKey(6L); } @Test public void testSelectByPrimaryKey() { User user = userRepo.selectByPrimaryKey(7L); System.out.println(user); } @Test public void testSelectAll() { List<User> userList = userRepo.selectAll(); System.out.println(userList); }}

總結

以上所述是小編給大家介紹的Spring Boot集成Mybatis的實例代碼(簡潔版)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！