概述
现在互联网应用中,大部分还是使用mybatis来操作数据库的,本文介绍一下spring boot中如何集成mybatis。
上篇介绍了spring boot 直接用jar运行项目的方法，需要的朋友点击查看。
创建spring boot工程
在 spring boot 开篇-创建和运行 一文中有一个小节介绍了如何使用spring boot的组件来创建工程。如果要集成mybatis,只需要把mysql和mybatis这两个组件勾选一下即可。
当然也可以不通过这种方式,直接在pom.xml文件中添加依赖也是可以的。我选择的是直接在pom.xml文件中直接添加依赖这种方式。
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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> |
数据源使用阿里的druid。完整的pom.xml文件内容如下:
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<?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> |
创建table
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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'; |
创建entity
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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 + '\'' + '}'; }} |
创建mybatis映射文件和repo
userrepo.java
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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
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<?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> |
编写application.properties
在spring boot为我们生成的application.properties文件中添加如下内容：
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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 |
单元测试
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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); }} |
总结
以上所述是小编给大家介绍的spring boot集成mybatis的实例代码(简洁版)，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/linsongbin1/article/details/79260946
