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> |
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: 8080spring: 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 |
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; |
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> |
- 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();} |
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(); }} |
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> |
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); }} |
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); }} |
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);} |
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(); }} |
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
