mybatis-plus入门二（代码生成器）

接着上一篇的文章，第一篇中写了一个小demo,mybatis-plus已经对简单CRUD进行了封装。业务上需要根据需求来自行添加。开始第二篇：
具体的创建工程就不说了，第一篇有。
创建新的子工程：

1.引入pom依赖：

标签中的名称改成自己的

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cd</groupId>
    <artifactId>rm-autogenerator</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>rm-autogenerator</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--lombok用来简化实体类-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--mybatis-plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.6</version>
        </dependency>
        <!--连接数据库-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <!--测试类-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--代码生成-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.0.6</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

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

</project>

2.新建一个mybatis-plus.properties

可以更改代码生成的位置，还可以更改名称…等等

#生成代码的位置（本地目录）
OutputDir=D:/cd-Test/mybatis-plusx/rm-autogenerator/src/main/java

#mapper.xml的位置（本地目录）
OutputDirXml=D:/cd-Test/mybatis-plusx/rm-autogenerator/src/main/resources

#表名
tableName=user

#包名后缀
className=crm

#????
author=ccc

#生成代码的位置在那个包下
#父包的路径
parent=com.cd

#连接数据库
url=jdbc:mysql://localhost:3306/数据库名?useUnicode=true&characterEncoding=utf-8&tinyInt1isBit=false
userName=youname
password=youpassword

3.创建一个代码生成包

用来获取mybatis-plus.properties

package com.cd.mybatisplusgenrator;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.util.ArrayList;
import java.util.List;
import java.util.ResourceBundle;

public class MpGenerator {
    public static void main(String[] args) throws InterruptedException {

        //用来获取Mybatis-Plus.properties文件的配置信息
        final ResourceBundle rb = ResourceBundle.getBundle(\"mybatis-plus\");

        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        gc.setOutputDir(rb.getString(\"OutputDir\"));
        gc.setOpen(false);
        gc.setBaseResultMap(true);
        gc.setBaseColumnList(true);
        gc.setAuthor(rb.getString(\"author\"));
        gc.setMapperName(\"%sMapper\");
        gc.setXmlName(\"%sMapper\");
        gc.setServiceName(\"%sService\");
        gc.setServiceImplName(\"%sServiceImpl\");
        gc.setControllerName(\"%sController\");
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.MYSQL);
        dsc.setUrl(rb.getString(\"url\"));
        dsc.setDriverName(\"com.mysql.jdbc.Driver\");
        dsc.setUsername(rb.getString(\"userName\"));
        dsc.setPassword(rb.getString(\"password\"));
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent(rb.getString(\"parent\"));
        pc.setController(\"controller.\" + rb.getString(\"className\"));
        pc.setService(\"service.\" + rb.getString(\"className\"));
        pc.setServiceImpl(\"service.\" + rb.getString(\"className\") + \".impl\");
        pc.setEntity(\"bean.\" + rb.getString(\"className\"));
        pc.setMapper(\"dao.\" + rb.getString(\"className\"));
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };
        List<FileOutConfig> focList = new ArrayList<>();
        focList.add(new FileOutConfig(\"/templates/mapper.xml.ftl\") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输入文件名称
                return rb.getString(\"OutputDirXml\") + \"/mapper/\" + rb.getString(\"className\") + \"/\" + tableInfo.getEntityName() + StringPool.DOT_XML;
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);
        mpg.setTemplate(new TemplateConfig().setXml(null));

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setEntityLombokModel(true);
        strategy.setInclude(new String[]{rb.getString(\"tableName\")});
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();

    }
}

这样就可以运行一下生成代码的类了。

4.可以来测试一下了

4.1：首先application.yml文件需要有：

spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=true
    username: root
    password: 1234

4.2：
4.3启动类上添加@MapperScan(“com.cd.dao.crm”)注解

package com.cd;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan(\"com.cd.dao.crm\")//写自己的mqpper位置
public class RmAutogeneratorApplication {

    public static void main(String[] args) {
        SpringApplication.run(RmAutogeneratorApplication.class, args);
    }
}

4.3：在单元测试中测试

package com.cd;

import com.cd.bean.crm.User;
import com.cd.dao.crm.UserMapper;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class RmAutogeneratorApplicationTests {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void contextLoads() {

        System.out.println((\"----- selectAll method test ------\"));
        List<User> userList = userMapper.selectList(null);
        Assert.assertEquals(5, userList.size());
        userList.forEach(System.out::println);
    }
}

over!