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: 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 |
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> |
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网站的支持！
原文链接：https://blog.csdn.net/winter_chen001/article/details/77249029
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