TOC

前言

AutoGenerator

MyBatis-Plus

AutoGenerator

Entity

Mapper

Mapper XML

Service

Controller

SpringBoot

MyBatis-Plus

CodeGenerator

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：