SpringBoot整合Mybatis 以及 mybatis自动生成代码配置

1、springboot的配置文件application.yml

#端口
server:
  port: 8080

  #模板页面
  #注释的部分是Thymeleaf默认的配置，如有其它需求可以自行更改
  spring:
    thymeleaf:
      cache: false
      prefix: classpath:/templates/
      suffix: .html
      mode: LEGACYHTML5
#      encoding: UTF-8
#      content-type: text/html

##数据源一
#spring:
#      datasource:
#          driverClass: com.mysql.jdbc.Driver
#          url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8
#          username: xuan
#          password: 123456
#数据源二
spring:
      datasource:
          url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8
          username: xuan
          password: 123456
          # 使用druid数据源
          type: com.alibaba.druid.pool.DruidDataSource
          driver-class-name: com.mysql.cj.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

#spring-boot整合mybatis
mybatis:
  #config-location: classpath:/mapper/config/mybatisConfig.xml #可以注射掉,没用到该配置文件
  mapper-locations: classpath:/mapper/*Mapper.xml
  #type-aliases-package: com.xuan.entity

2、maven的配置文件pom.xml (加入springboot整合mybatis的jar包，以及mysql驱动jar包，阿里的数据库链接池jar包)

以及mybatis 自动生成代码的一些配置

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>4.0.0modelVersion>

    <groupId>com.xuangroupId>
    <artifactId>myspringbootartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <packaging>jarpackaging>

    <name>myspringbootname>
    <description>Demo project for Spring Bootdescription>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>1.5.8.RELEASEversion>
        <relativePath/>
    parent>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <java.version>1.8java.version>

        <mybatis.generator.version>1.3.2mybatis.generator.version>
        <mysql.connector.java.version>6.0.6mysql.connector.java.version>





        <classPathEntry.mysql.location>/Users/chenqixuan/.m2/repository/mysql/mysql-connector-java/5.1.38/mysql-connector-java-5.1.38.jarclassPathEntry.mysql.location>
        <javaModelGenerator.targetProject>${basedir}/src/main/javajavaModelGenerator.targetProject>
        <sqlMapGenerator.targetProject>${basedir}/src/main/resourcessqlMapGenerator.targetProject>
        <javaClientGenerator.targetProject>${basedir}/src/main/javajavaClientGenerator.targetProject>
        <mybatis.generator.configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xmlmybatis.generator.configurationFile>
        <mybatis.generator.overwrite>truemybatis.generator.overwrite>
    properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redisartifactId>
        dependency>

        <dependency>
            <groupId>org.mybatis.spring.bootgroupId>
            <artifactId>mybatis-spring-boot-starterartifactId>
            <version>1.3.1version>
        dependency>

        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>${mysql.connector.java.version}version>
        dependency>

        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.0.11version>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>


        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
        dependency>
        <dependency>
            <groupId>net.sourceforge.nekohtmlgroupId>
            <artifactId>nekohtmlartifactId>
            <version>1.9.22version>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>

            <plugin>
                <groupId>org.mybatis.generatorgroupId>
                <artifactId>mybatis-generator-maven-pluginartifactId>
                <version>${mybatis.generator.version}version>
            plugin>
        plugins>
    build>


project>

3、mybatis的配置文件 （可以不要需要，因为在application.yml配置了）

xml version="1.0" encoding="UTF-8"?>

        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    <settings>

        <setting name="lazyLoadingEnabled" value="false" />
    settings>

    <mappers>


    mappers>

configuration>

4、用户实体类xml映射文件 UserMapper.xml

xml version="1.0" encoding="UTF-8"?>
>
<mapper namespace="com.xuan.mapper.UserMapper">


    <select id="getAllUser" resultType="com.xuan.entity.User">
          SELECT * from user
    select>

mapper>

5、自动生成配置文件 generatorConfig.xml（项目目录下运行命令： mvn mybatis-generator:generate -e ）

注意：generatorConfig.xml配置文件中有些参数笔者是配置在pom.xml里的，另外mysql-connector-java-5.1.38.jar  数据库mysql驱动也不要使用太高的版本（笔者使用6.0.6版本是遇到错误，换成低版本就没事）

xml version="1.0" encoding="UTF-8"?>

        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <classPathEntry location="${classPathEntry.mysql.location}" />

    <context id="mysqlTables" targetRuntime="MyBatis3">
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8"
                        userId="xuan" password="123456">
        jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        javaTypeResolver>

        <javaModelGenerator targetPackage="com.xuan.entity"
                            targetProject="${javaModelGenerator.targetProject}">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        javaModelGenerator>

        <sqlMapGenerator targetPackage="mapper"
                         targetProject="${sqlMapGenerator.targetProject}">
            <property name="enableSubPackages" value="true" />
        sqlMapGenerator>

        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.xuan.mapper" targetProject="${javaClientGenerator.targetProject}">
            <property name="enableSubPackages" value="false" />
        javaClientGenerator>


        <table tableName="video" domainObjectName="Video">table>


    context>
generatorConfiguration>

6、用户实体类：

package com.xuan.entity;

import java.io.Serializable;

/**
 * Created by chenqixuan on 17/10/24.
 */
public class User implements Serializable{
    private static final long serialVersionUID = 2120869894112984147L;

    private Integer id;

    private String  name;

    private  Integer age;

    private String address;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

7、dao层是使用@Mapper注解接口代理，以前spring是使用自动扫描

package com.xuan.mapper;

import com.xuan.entity.User;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

/**
 * Created by chenqixuan on 17/10/24.
 */
@Mapper
public interface UserMapper {

    public List getAllUser();

}

8、controller引用：

package com.xuan.controller;

import com.xuan.entity.User;
import com.xuan.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.*;

/**
 * Created by chenqixuan on 17/10/24.
 */
@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @GetMapping(value="/all")
    public List getAllUser(){

        return userMapper.getAllUser();
    }


}

9、效果图：

10、目录结构：