本项目使用的环境：
- 开发工具：intellij idea 2017.1.3
- springboot: 1.5.6
- jdk：1.8.0_161
- maven:3.3.9
额外功能
- pagehelper 分页插件
- mybatis generator 自动生成代码插件
步骤：
1.创建一个springboot项目：
2.创建项目的文件结构以及jdk的版本
3.选择项目所需要的依赖
然后点击finish
5.看一下文件的结构：
6.查看一下pom.xml：
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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.winter</groupid>
<artifactid>springboot-mybatis-demo</artifactid>
<version>0.0.1-snapshot</version>
<packaging>jar</packaging>
<name>springboot-mybatis-demo</name>
<description>demo project for spring boot</description>
<parent>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-parent</artifactid>
<version>1.5.6.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>1.7</java.version>
</properties>
<dependencies>
<dependency>
<groupid>org.mybatis.spring.boot</groupid>
<artifactid>mybatis-spring-boot-starter</artifactid>
<version>1.3.0</version>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-thymeleaf</artifactid>
</dependency>
<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>
<dependency>
<groupid>mysql</groupid>
<artifactid>mysql-connector-java</artifactid>
<version>5.1.35</version>
</dependency>
<dependency>
<groupid>com.fasterxml.jackson.core</groupid>
<artifactid>jackson-core</artifactid>
</dependency>
<dependency>
<groupid>com.fasterxml.jackson.core</groupid>
<artifactid>jackson-databind</artifactid>
</dependency>
<dependency>
<groupid>com.fasterxml.jackson.datatype</groupid>
<artifactid>jackson-datatype-joda</artifactid>
</dependency>
<dependency>
<groupid>com.fasterxml.jackson.module</groupid>
<artifactid>jackson-module-parameter-names</artifactid>
</dependency>
<!-- 分页插件 -->
<dependency>
<groupid>com.github.pagehelper</groupid>
<artifactid>pagehelper-spring-boot-starter</artifactid>
<version>1.1.2</version>
</dependency>
<!-- alibaba的druid数据库连接池 -->
<dependency>
<groupid>com.alibaba</groupid>
<artifactid>druid-spring-boot-starter</artifactid>
<version>1.1.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-maven-plugin</artifactid>
</plugin>
<!-- mybatis generator 自动生成代码插件 -->
<plugin>
<groupid>org.mybatis.generator</groupid>
<artifactid>mybatis-generator-maven-plugin</artifactid>
<version>1.3.2</version>
<configuration>
<configurationfile>${basedir}/src/main/resources/generator/generatorconfig.xml</configurationfile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
</project>
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7.项目不使用application.properties文件 而使用更加简洁的application.yml文件：
将原有的resource文件夹下的application.properties文件删除，创建一个新的application.yml配置文件，
文件的内容如下：
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server:
port: 8080
spring:
datasource:
name: test
url: jdbc:mysql://127.0.0.1:3306/depot
username: root
password: root
# 使用druid数据源
type: com.alibaba.druid.pool.druiddatasource
driver-class-name: com.mysql.jdbc.driver
filters: stat
maxactive: 20
initialsize: 1
maxwait: 60000
minidle: 1
timebetweenevictionrunsmillis: 60000
minevictableidletimemillis: 300000
validationquery: select 'x'
testwhileidle: true
testonborrow: false
testonreturn: false
poolpreparedstatements: true
maxopenpreparedstatements: 20
## 该配置节点为独立的节点，有很多同学容易将这个配置放在spring的节点下，导致配置无法被识别
mybatis:
mapper-locations: classpath:mapping/*.xml #注意：一定要对应mapper映射xml文件的所在路径
type-aliases-package: com.winter.model # 注意：对应实体类的路径
#pagehelper分页插件
pagehelper:
helperdialect: mysql
reasonable: true
supportmethodsarguments: true
params: count=countsql
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8.创建数据库：
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create database mytest;
create table t_user(
user_id int not null primary key auto_increment,
user_name varchar(255) not null ,
password varchar(255) not null ,
phone varchar(255) not null
) engine=innodb auto_increment=1000 default charset=utf8;
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9.使用mybatis generator 自动生成代码：
- 配置pom.xml中generator 插件所对应的配置文件 ${basedir}/src/main/resources/generator/generatorconfig.xml
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<?xml version="1.0" encoding="utf-8"?>
<!doctype generatorconfiguration
public "-//mybatis.org//dtd mybatis generator configuration 1.0//en"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorconfiguration>
<!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
<classpathentry location="e:\developer\mybatis-generator-core-1.3.2\lib\mysql-connector-java-5.1.25-bin.jar"/>
<context id="db2tables" targetruntime="mybatis3">
<commentgenerator>
<property name="suppressdate" value="true"/>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressallcomments" value="true"/>
</commentgenerator>
<!--数据库链接url，用户名、密码 -->
<jdbcconnection driverclass="com.mysql.jdbc.driver" connectionurl="jdbc:mysql://127.0.0.1/mytest" userid="root" password="root">
</jdbcconnection>
<javatyperesolver>
<property name="forcebigdecimals" value="false"/>
</javatyperesolver>
<!-- 生成模型的包名和位置-->
<javamodelgenerator targetpackage="com.winter.model" targetproject="src/main/java">
<property name="enablesubpackages" value="true"/>
<property name="trimstrings" value="true"/>
</javamodelgenerator>
<!-- 生成映射文件的包名和位置-->
<sqlmapgenerator targetpackage="mapping" targetproject="src/main/resources">
<property name="enablesubpackages" value="true"/>
</sqlmapgenerator>
<!-- 生成dao的包名和位置-->
<javaclientgenerator type="xmlmapper" targetpackage="com.winter.mapper" targetproject="src/main/java">
<property name="enablesubpackages" value="true"/>
</javaclientgenerator>
<!-- 要生成的表 tablename是数据库中的表名或视图名 domainobjectname是实体类名-->
<table tablename="t_user" domainobjectname="user" enablecountbyexample="false" enableupdatebyexample="false" enabledeletebyexample="false" enableselectbyexample="false" selectbyexamplequeryid="false"></table>
</context>
</generatorconfiguration>
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- 点击run-edit configurations
- 添加配置
-
运行
注意！！！同一张表一定不要运行多次，因为mapper的映射文件中会生成多次的代码，导致报错，切记
最后生成的文件以及结构：
10. 生成的文件
usermapper.java
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package com.winter.mapper;
import com.winter.model.user;
public interface usermapper {
int deletebyprimarykey(integer userid);
int insert(user record);
int insertselective(user record);
user selectbyprimarykey(integer userid);
int updatebyprimarykeyselective(user record);
int updatebyprimarykey(user record);
//这个方式我自己加的
list<user> selectalluser();
}
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user.java
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package com.winter.model;
public class user {
private integer userid;
private string username;
private string password;
private string phone;
public integer getuserid() {
return userid;
}
public void setuserid(integer userid) {
this.userid = userid;
}
public string getusername() {
return username;
}
public void setusername(string username) {
this.username = username == null ? null : username.trim();
}
public string getpassword() {
return password;
}
public void setpassword(string password) {
this.password = password == null ? null : password.trim();
}
public string getphone() {
return phone;
}
public void setphone(string phone) {
this.phone = phone == null ? null : phone.trim();
}
}
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对于sql语句这种黄色的背景，真心是看不下去了（解决方案）：
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.winter.mapper.usermapper" >
<resultmap id="baseresultmap" type="com.winter.model.user" >
<id column="user_id" property="userid" jdbctype="integer" />
<result column="user_name" property="username" jdbctype="varchar" />
<result column="password" property="password" jdbctype="varchar" />
<result column="phone" property="phone" jdbctype="varchar" />
</resultmap>
<sql id="base_column_list" >
user_id, user_name, password, phone
</sql>
<select id="selectbyprimarykey" resultmap="baseresultmap" parametertype="java.lang.integer" >
select
<include refid="base_column_list" />
from t_user
where user_id = #{userid,jdbctype=integer}
</select>
<!-- 这个方法是我自己加的 -->
<select id="selectalluser" resultmap="baseresultmap">
select
<include refid="base_column_list" />
from t_user
</select>
<delete id="deletebyprimarykey" parametertype="java.lang.integer" >
delete from t_user
where user_id = #{userid,jdbctype=integer}
</delete>
<insert id="insert" parametertype="com.winter.model.user" >
insert into t_user (user_id, user_name, password,
phone)
values (#{userid,jdbctype=integer}, #{username,jdbctype=varchar}, #{password,jdbctype=varchar},
#{phone,jdbctype=varchar})
</insert>
<insert id="insertselective" parametertype="com.winter.model.user" >
insert into t_user
<trim prefix="(" suffix=")" suffixoverrides="," >
<if test="userid != null" >
user_id,
</if>
<if test="username != null" >
user_name,
</if>
<if test="password != null" >
password,
</if>
<if test="phone != null" >
phone,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixoverrides="," >
<if test="userid != null" >
#{userid,jdbctype=integer},
</if>
<if test="username != null" >
#{username,jdbctype=varchar},
</if>
<if test="password != null" >
#{password,jdbctype=varchar},
</if>
<if test="phone != null" >
#{phone,jdbctype=varchar},
</if>
</trim>
</insert>
<update id="updatebyprimarykeyselective" parametertype="com.winter.model.user" >
update t_user
<set >
<if test="username != null" >
user_name = #{username,jdbctype=varchar},
</if>
<if test="password != null" >
password = #{password,jdbctype=varchar},
</if>
<if test="phone != null" >
phone = #{phone,jdbctype=varchar},
</if>
</set>
where user_id = #{userid,jdbctype=integer}
</update>
<update id="updatebyprimarykey" parametertype="com.winter.model.user" >
update t_user
set user_name = #{username,jdbctype=varchar},
password = #{password,jdbctype=varchar},
phone = #{phone,jdbctype=varchar}
where user_id = #{userid,jdbctype=integer}
</update>
</mapper>
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11.打开类springbootmybatisdemoapplication.java，这个是springboot的启动类。我们需要添加点东西：
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package com.winter;
import org.mybatis.spring.annotation.mapperscan;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
@springbootapplication
@mapperscan("com.winter.mapper")//将项目中对应的mapper类的路径加进来就可以了
public class springbootmybatisdemoapplication {
public static void main(string[] args) {
springapplication.run(springbootmybatisdemoapplication.class, args);
}
}
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注意：@mapperscan("com.winter.mapper")这个注解非常的关键，这个对应了项目中mapper（dao）所对应的包路径，很多同学就是这里忘了加导致异常的
12.到这里所有的搭建工作都完成了，接下来就是测试的工作，没使用junit4进行测试：
首先看一下完成之后的文件的结构：
现在controller，service层的代码都写好：
usercontroller.java
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package com.winter.controller;
import com.winter.model.user;
import com.winter.service.userservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.pathvariable;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.responsebody;
/**
* created by administrator on 2017/8/16.
*/
@controller
@requestmapping(value = "/user")
public class usercontroller {
@autowired
private userservice userservice;
@responsebody
@requestmapping(value = "/add", produces = {"application/json;charset=utf-8"})
public int adduser(user user){
return userservice.adduser(user);
}
@responsebody
@requestmapping(value = "/all/{pagenum}/{pagesize}", produces = {"application/json;charset=utf-8"})
public object findalluser(@pathvariable("pagenum") int pagenum, @pathvariable("pagesize") int pagesize){
return userservice.findalluser(pagenum,pagesize);
}
}
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userservice.java
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package com.winter.service;
import com.winter.model.user;
import java.util.list;
/**
* created by administrator on 2017/8/16.
*/
public interface userservice {
int adduser(user user);
list<user> findalluser(int pagenum, int pagesize);
}
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userserviceimpl.java
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package com.winter.service.impl;
import com.github.pagehelper.pagehelper;
import com.winter.mapper.usermapper;
import com.winter.model.user;
import com.winter.service.userservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import java.util.list;
/**
* created by administrator on 2017/8/16.
*/
@service(value = "userservice")
public class userserviceimpl implements userservice {
@autowired
private usermapper usermapper;//这里会报错，但是并不会影响
@override
public int adduser(user user) {
return usermapper.insertselective(user);
}
/*
* 这个方法中用到了我们开头配置依赖的分页插件pagehelper
* 很简单，只需要在service层传入参数，然后将参数传递给一个插件的一个静态方法即可；
* pagenum 开始页数
* pagesize 每页显示的数据条数
* */
@override
public list<user> findalluser(int pagenum, int pagesize) {
//将参数传给这个方法就可以实现物理分页了，非常简单。
pagehelper.startpage(pagenum, pagesize);
return usermapper.selectalluser();
}
}
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如果强迫症看不下去那个报错：（解决方法）
测试我使用了idea一个很用心的功能。
可以发http请求的插件：
点击左侧的运行按钮就可以发送请求了；
如果返回值正确 说明你已经搭建成功了！！
**如果出现mapper注入不了的情况，请检查版本，当前博客的搭建方法只适合1.5.*版本的，如果你的版本是2.0以上的版本，请参照我的另一篇博客的mybatis的配置：springboot2.0整合mybatis **
源码地址：https://github.com/winterchens/springboot-mybatis-demo
总结以上所述是小编给大家介绍的Spring boot Mybatis 整合（完整版），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：https://blog.csdn.net/winter_chen001/article/details/77249029