框架 Spring Boot 技术入门到整合 8-1 Springboot整合Mybatis-使用generatorConfig生成mapper以及pojo

0　　　　课程地址

https://www.imooc.com/video/16726/0

1　　　　本节概要

使用generatorConfig生成mapper 以及pojo

2　　　　demo

2.1　　demo（执行方式为：执行GeneratorDisplay的main方法)

pom.xml(引入相关依赖)

<!-- mybaties 课程部分-->
        <!-- 1    数据源部分  引入数据源  阿里巴巴 德鲁伊 （有性能监控部分）-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.0</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>

        <!--  2    mybatis部分-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!--mapper-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>1.2.4</version>
        </dependency>
        <!--pagehelper-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

        <!--  3    自动生成 pojo 和 xml-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
            <scope>compile</scope>
            <optional>true</optional>
        </dependency>

application.xml(引入相关配置)

############################################################
#
# 配置数据源相关  使用阿里巴巴的 druid 数据源
#
############################################################
spring.datasource.url=jdbc:mysql://localhost:3306/bendi
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.druid.initial-size=1
spring.datasource.druid.min-idle=1
spring.datasource.druid.max-active=20
spring.datasource.druid.test-on-borrow=true
spring.datasource.druid.stat-view-servlet.allow=true

############################################################
############################################################
#
# mybatis 配置
#
############################################################
# mybatis 配置
# 自动生成pojo路径
mybatis.type-aliases-package=com.example.demo.pojo
# 自动生成 *maper.xml 路径
mybatis.mapper-locations=classpath:mapper/*.xml
# 通用 Mapper 配置
mapper.mappers=com.example.demo.tools.MyMapper
mapper.not-empty=false
mapper.identity=MYSQL
# 分页插件配置
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql

GeneratorDisplay.java

package com.example.demo.tools;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

public class GeneratorDisplay {

    public void generator() throws Exception{

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        //指定 逆向工程配置文件
        File configFile = new File("generatorConfig.xml"); 
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);

    } 
    
    public static void main(String[] args) throws Exception {
        try {
            GeneratorDisplay generatorSqlmap = new GeneratorDisplay();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }
}

generatorConfig.xml

<?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>
    <context id="MysqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers" value="com.example.demo.tools.MyMapper"/>
        </plugin>

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/bendi"
                        userId="root"
                        password="root">
        </jdbcConnection>

        <!-- 对于生成的pojo所在包 -->
        <javaModelGenerator targetPackage="com.example.demo.pojo" targetProject="src/main/java"/>

        <!-- 对于生成的mapper所在目录 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>

        <!-- 配置mapper对应的java映射 -->
        <javaClientGenerator targetPackage="com.example.demo.mapper" targetProject="src/main/java"
                             type="XMLMAPPER"/>


        <table tableName="aaa"></table>
         
    </context>
</generatorConfiguration>

MyMapper.java

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2016 abel533@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.example.demo.tools;

import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

/**
 * 继承自己的MyMapper
 *
 * @author liuzh
 * @since 2015-09-06 21:53
 */
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T> {
    //TODO
    //FIXME 特别注意，该接口不能被扫描到，否则会出错
}

执行完成后生成的相关类：

AaaMapper.xml

<?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.example.demo.mapper.AaaMapper" >
  <resultMap id="BaseResultMap" type="com.example.demo.pojo.Aaa" >
    <!--
      WARNING - @mbg.generated
    -->
    <result column="id" property="id" jdbcType="VARCHAR" />
    <result column="name" property="name" jdbcType="VARCHAR" />
    <result column="roleid" property="roleid" jdbcType="VARCHAR" />
  </resultMap>
</mapper>

AaaMapper.java

package com.example.demo.mapper;

import com.example.demo.pojo.Aaa;
import com.example.demo.tools.MyMapper;

public interface AaaMapper extends MyMapper<Aaa> {
}

Aaa.java

package com.example.demo.pojo;

import javax.persistence.*;

public class Aaa {
    private String id;

    private String name;

    private String roleid;

    /**
     * @return id
     */
    public String getId() {
        return id;
    }

    /**
     * @param id
     */
    public void setId(String id) {
        this.id = id;
    }

    /**
     * @return name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return roleid
     */
    public String getRoleid() {
        return roleid;
    }

    /**
     * @param roleid
     */
    public void setRoleid(String roleid) {
        this.roleid = roleid;
    }
}

3　　　　常见释义：

pojo　　包含属性以及get set方法的bean类

应用技术： 反射