SpringBoot

目录

• 前言
  • 环境
• 具体实现
  • 代码生成器
  • 自定义代码模板
  • 测试

前言

AutoGenerator是MyBatis-Plus的代码生成器，通过AutoGenerator可以快速生成Entity、Mapper、Mapper XML、Service、Controller等各个模块的代码，这里介绍下SpringBoot中集成MyBatis-Plus代码生成器CodeGenerator的方式，模板引擎使用Freemarker。

环境

SpringBoot2.53 + Mybatis-Plus3.3.0

具体实现

代码生成器

• pom.xml

<!-- MyBatis-Plus从3.0.3之后移除了代码生成器与模板引擎的默认依赖，需要手动添加相关依赖 -->
<!-- generator -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.3.0</version>
</dependency>

<!-- freemarker -->
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.28</version>
</dependency>

• CodeGenerator.java

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 * 代码生成器
 */
public class CodeGenerator {

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig
                .setAuthor("generator@xxx")
                .setOpen(false)
                .setFileOverride(false)
                .setIdType(IdType.AUTO)
                .setBaseResultMap(true)
                .setEntityName("%s")
                .setServiceName("%sService");
        mpg.setGlobalConfig(globalConfig);

        // 数据源配置
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig
                .setUrl("jdbc:mysql://localhost:3306/cms?allowPublicKeyRetrieval=true&useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=Asia/Shanghai")
                .setDriverName("com.mysql.cj.jdbc.Driver")
                .setUsername("root")
                .setPassword("sunday");
        mpg.setDataSource(dataSourceConfig);

        // 包名配置
        PackageConfig packageConfig = new PackageConfig();
        packageConfig
                .setParent("com.coisini.mybatisplus")
                .setPathInfo(getPathInfo())
                .setEntity("entity")
                .setController("controller")
                .setXml("xml");
        mpg.setPackageInfo(packageConfig);

        // 模板配置
        TemplateConfig templateConfig = new TemplateConfig();
        templateConfig
                .setEntity("/templates/entity.java")
                .setXml("/templates/mapper.xml")
                .setController("/templates/controller.java");
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig
                .setNaming(NamingStrategy.underline_to_camel)
                .setSuperEntityClass("com.coisini.mybatisplus.entity.BaseEntity")
                .setEntitySerialVersionUID(false)
                .setEntityLombokModel(true)
                .setRestControllerStyle(true)
                .setSuperEntityColumns("id", "create_time")
                .setInclude(scanner("表名，多个英文逗号分割").split(","))
                .setControllerMappingHyphenStyle(true);
        mpg.setStrategy(strategyConfig);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }

    /**
     * 读取控制台内容
     */
    private static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入" + tip + "：");
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotBlank(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "！");
    }

    private static Map<String, String> getPathInfo() {
        Map<String, String> pathInfo = new HashMap<>();
        pathInfo.put(ConstVal.ENTITY_PATH, System.getProperty("user.dir") + "/src/main/java/com/coisini/mybatisplus/entity");
        pathInfo.put(ConstVal.MAPPER_PATH, System.getProperty("user.dir") + "/src/main/java/com/coisini/mybatisplus/mapper");
        pathInfo.put(ConstVal.SERVICE_PATH, System.getProperty("user.dir") + "/src/main/java/com/coisini/mybatisplus/service");
        pathInfo.put(ConstVal.SERVICE_IMPL_PATH, System.getProperty("user.dir") + "/src/main/java/com/coisini/mybatisplus/service/impl");
        pathInfo.put(ConstVal.CONTROLLER_PATH, System.getProperty("user.dir") + "/src/main/java/com/coisini/mybatisplus/controller");
        pathInfo.put(ConstVal.XML_PATH, System.getProperty("user.dir") + "/src/main/resources/mapper");
        return pathInfo;
    }
}

自定义代码模板

• 自定义代码模板Controller，Entity，mapper-xml，目录如下所示：

• 控制器模板controller.java.ftl

package ${package.Controller};

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestParam;
import ${package.Entity}.${entity};

<#if restControllerStyle>
import org.springframework.web.bind.annotation.RestController;
<#else>
import org.springframework.stereotype.Controller;
</#if>
<#if superControllerClassPackage??>
import ${superControllerClassPackage};
</#if>

/**
<#if table.comment != "">
 * ${table.comment!}控制器
 *
</#if>
* @author ${author}
* @since ${date}
*/
<#if restControllerStyle>
@RestController
<#else>
@Controller
</#if>
@RequestMapping("/${package.Controller?split(".")?last}<#if package.ModuleName??>/${package.ModuleName}</#if>/<#if controllerMappingHyphenStyle??>${controllerMappingHyphen?replace("-do", "")}<#else>${table.entityPath?replace("DO", "")}</#if>")
<#if kotlin>
class ${table.controllerName}<#if superControllerClass??> : ${superControllerClass}()</#if>
<#else>
<#if superControllerClass??>
public class ${table.controllerName} extends ${superControllerClass} {
<#else>
public class ${table.controllerName} {
</#if>

    @PostMapping("")
    public void create() {

    }

    @PutMapping("/{id}")
    public void update(@PathVariable Long id) {

    }

    @DeleteMapping("/{id}")
    public void delete(@PathVariable Long id) {

    }

    @GetMapping("/{id}")
    public ${entity} get(@PathVariable(value = "id") Long id) {
        return null;
    }

}
</#if>

• 实体模板entity.java.ftl

package ${package.Entity};

<#list table.importPackages as pkg>
<#--子类变量包含id才导入相应的包-->
<#if (pkg =="com.baomidou.mybatisplus.annotation.IdType" || pkg =="com.baomidou.mybatisplus.annotation.TableId")>
    <#list table.fields as field>
        <#if field.keyFlag>
import ${pkg};
        </#if>
    </#list>
<#else>
import ${pkg};
</#if>
</#list>
<#if swagger2>
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
</#if>
<#if entityLombokModel>
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;
</#if>

/**
<#if table.comment != "">
 * ${table.comment!}
 *
</#if>
 * @author ${author}
 * @since ${date}
 */
<#if entityLombokModel>
@Data
    <#if superEntityClass??>
@EqualsAndHashCode(callSuper = true)
    <#else>
@EqualsAndHashCode(callSuper = false)
    </#if>
@Accessors(chain = true)
</#if>
<#if table.convert>
@TableName("${table.name}")
</#if>
<#if swagger2>
@ApiModel(value="${entity}对象", description="${table.comment!}")
</#if>
<#if superEntityClass??>
public class ${entity} extends ${superEntityClass}<#if activeRecord><${entity}></#if> {
<#elseif activeRecord>
public class ${entity} extends Model<${entity}> {
<#else>
public class ${entity} implements Serializable {
</#if>

<#if entitySerialVersionUID>
    private static final long serialVersionUID = 1L;
</#if>
<#-- ----------  BEGIN 字段循环遍历  ---------->
<#list table.fields as field>
    <#if field.keyFlag>
        <#assign keyPropertyName="${field.propertyName}"/>
    </#if>

    <#if field.comment!?length gt 0>
        <#if swagger2>
    @ApiModelProperty(value = "${field.comment}")
        <#else>
    /**
     * ${field.comment}
     */
        </#if>
    </#if>
    <#if field.keyFlag>
        <#-- 主键 -->
        <#if field.keyIdentityFlag>
    @TableId(value = "${field.name}", type = IdType.AUTO)
        <#elseif idType??>
    @TableId(value = "${field.name}", type = IdType.${idType})
        <#elseif field.convert>
    @TableId("${field.name}")
        </#if>
        <#-- 普通字段 -->
    <#elseif field.fill??>
    <#-- -----   存在字段填充设置   ----->
        <#if field.convert>
    @TableField(value = "${field.name}", fill = FieldFill.${field.fill})
        <#else>
    @TableField(fill = FieldFill.${field.fill})
        </#if>
    <#elseif field.convert>
    @TableField("${field.name}")
    </#if>
    <#-- 乐观锁注解 -->
    <#if (versionFieldName!"") == field.name>
    @Version
    </#if>
    <#-- 逻辑删除注解 -->
    <#if (logicDeleteFieldName!"") == field.name>
    @TableLogic
    </#if>
    private ${field.propertyType} ${field.propertyName};
</#list>
<#------------  END 字段循环遍历  ---------->

<#if !entityLombokModel>
    <#list table.fields as field>
        <#if field.propertyType == "boolean">
            <#assign getprefix="is"/>
        <#else>
            <#assign getprefix="get"/>
        </#if>
    public ${field.propertyType} ${getprefix}${field.capitalName}() {
        return ${field.propertyName};
    }

    <#if entityBuilderModel>
    public ${entity} set${field.capitalName}(${field.propertyType} ${field.propertyName}) {
    <#else>
    public void set${field.capitalName}(${field.propertyType} ${field.propertyName}) {
    </#if>
        this.${field.propertyName} = ${field.propertyName};
        <#if entityBuilderModel>
        return this;
        </#if>
    }
    </#list>
</#if>

<#if entityColumnConstant>
    <#list table.fields as field>
    public static final String ${field.name?upper_case} = "${field.name}";

    </#list>
</#if>
<#if activeRecord>
    @Override
    protected Serializable pkVal() {
    <#if keyPropertyName??>
        return this.${keyPropertyName};
    <#else>
        return null;
    </#if>
    }

</#if>
<#if !entityLombokModel>
    @Override
    public String toString() {
        return "${entity}{" +
    <#list table.fields as field>
        <#if field_index==0>
            "${field.propertyName}=" + ${field.propertyName} +
        <#else>
            ", ${field.propertyName}=" + ${field.propertyName} +
        </#if>
    </#list>
        "}";
    }
</#if>
}

• xml模板mapper.xml.ftl

<?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="${package.Mapper}.${table.mapperName}">

<#if enableCache>
    <!-- 开启二级缓存 -->
    <cache type="org.mybatis.caches.ehcache.LoggingEhcache"/>

</#if>
<#if baseResultMap>
    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="${package.Entity}.${entity}">
<#list table.fields as field>
<#if field.keyFlag><#--生成主键排在第一位-->
        <id column="${field.name}" property="${field.propertyName}" />
</#if>
</#list>
<#list table.commonFields as field><#--生成公共字段 -->
    <#if field.keyFlag>
        <id column="${field.name}" property="${field.propertyName}" />
    <#else>
        <result column="${field.name}" property="${field.propertyName}" />
    </#if>
</#list>
<#list table.fields as field>
<#if !field.keyFlag><#--生成普通字段 -->
        <result column="${field.name}" property="${field.propertyName}" />
</#if>
</#list>
    </resultMap>

</#if>
<#if baseColumnList>
    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
<#list table.commonFields as field>
        ${field.name},
</#list>
        ${table.fieldNames}
    </sql>

</#if>
</mapper>

测试

• 新建表

CREATE TABLE `test` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(100) COLLATE utf8_unicode_ci DEFAULT NULL,
  `create_time` datetime DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

• 运行CodeGenerator的main方法

• 生成目录文件如下所示：

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