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>
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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>
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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';
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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 + '\'' +
'}';
}
}
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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
@mapper
public interface userrepo {
int insert(user user);
user selectbyprimarykey(long id);
int updatebyprimarykey(user user);
int deletebyprimarykey(long id);
list<user> selectall();
}
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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>
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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
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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)
@springboottest
public 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);
}
}
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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