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Spring Boot集成Mybatis的实例代码(简洁版)

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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.

Spring Boot集成Mybatis的实例代码(简洁版)

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
@mapper
public 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 )
@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);
  }
}

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我网站的支持! 。

原文链接:http://blog.csdn.net/linsongbin1/article/details/79260946 。

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