mybatis-plus代码生成器自动生成代码
0、使用的背景:idea2022.2.3
mysql:8.0
Navicat Premium16
1、 创建一个数据库和user表
user 表:
/*
Navicat Premium Data Transfer
Source Server : mysql
Source Server Type : MySQL
Source Server Version : 80030 (8.0.30)
Source Host : localhost:3306
Source Schema : gms
Target Server Type : MySQL
Target Server Version : 80030 (8.0.30)
File Encoding : 65001
Date: 20/06/2023 20:53:55
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`userId` int NOT NULL COMMENT '用户id',
`userName` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '用户名',
`password` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '密码',
`role_id` int NOT NULL COMMENT '角色,0:超级,1-4:管理员,5:普通',
`isValid` varchar(4) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT 'Y' COMMENT '是否有效,Y 有效,N 无效',
PRIMARY KEY (`userId`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (20200001, 'admain', 'admain', 0, 'Y');
SET FOREIGN_KEY_CHECKS = 1;
2、创建一个springboot项目和关联数据库
连接数据库下面有连接:ps不这么麻烦也可以的
https://blog.csdn.net/qq_51979055/article/details/128022273
3、在pom.xml导入依赖
<?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 https://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>2.7.12</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.gsm</groupId>
<artifactId>gsm_equip</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gsm_equip</name>
<description>gsm_equip</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- springboot-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- mybatis-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.1</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.3.1</version>
</dependency>
<!-- mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!-- 快速生成器-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.4.1</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>org.apache.velocity</groupId>-->
<!-- <artifactId>velocity-engine-core</artifactId>-->
<!-- <version>2.3</version>-->
<!-- </dependency>-->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.30</version>
</dependency>
<dependency>
<groupId>com.spring4all</groupId>
<artifactId>spring-boot-starter-swagger</artifactId>
<version>1.5.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
</plugins>
</build>
</project>
4、在resourse文件夹下创建application.yml文件或把原来的application.proxxx文件的后缀改为 yml;==》
#mysql
spring:
datasource:
#MySql??
#gms是自己建立的数据库
url: jdbc:mysql://localhost:3306/gms?characterEncoding=UTF-8&serverTimezone=GMT%2B8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
server:
port: 9090
5、在com/gsm/gsm_equip目录下创建comment包,在comment包下创建CodeGenerator文件来放生成器的代码,
```java
package com.gsm.gsm_equip.common;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.FileType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class CodeGenerator {
/**
* <p>
* 读取控制台内容
* </p>
*/
public static String scanner(String tip) {
Scanner scanner = new Scanner(System.in);
StringBuilder help = new StringBuilder();
help.append("请输入" + tip + ":");
System.out.println(help.toString());
if (scanner.hasNext()) {
String ipt = scanner.next();
if (StringUtils.isNotBlank(ipt)) {
return ipt;
}
}
throw new MybatisPlusException("请输入正确的" + tip + "!");
}
public static void main(String[] args) {
// 代码生成器
AutoGenerator mpg = new AutoGenerator();
// 全局配置
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/src/main/java");
gc.setAuthor("junm");
gc.setOpen(false);
gc.setSwagger2(true); //实体属性 Swagger2 注解
// 会在mapper.xml文件中生成一个基础的<resultmap>会映射所有的字段
gc.setBaseResultMap(true);
gc.setBaseColumnList(true); //columnList
gc.setServiceName("%sService");
// 将全局配置设置到AutoGenerator
mpg.setGlobalConfig(gc);
//一。 数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://localhost:3306/gms?characterEncoding=UTF-8&serverTimezone=GMT%2B8");
// dsc.setSchemaName("public");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("root");
mpg.setDataSource(dsc);
// 包配置
PackageConfig pc = new PackageConfig();
// pc.setModuleName(scanner("gsm_equip"));
//二、模块配置
//这个路径参考自己的
pc.setParent("com.gsm.gsm_equip")
.setEntity("entity")
.setMapper("mapper")
.setService("service")
.setServiceImpl("service.impl")
.setController("controller");
mpg.setPackageInfo(pc);
// 自定义配置
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
// to do nothing
}
};
// 如果模板引擎是 freemarker
String templatePath = "/templates/mapper.xml.ftl";
// 如果模板引擎是 velocity
// String templatePath = "/templates/mapper.xml.vm";
// 自定义输出配置
List<FileOutConfig> focList = new ArrayList<>();
// 自定义配置会被优先输出
focList.add(new FileOutConfig(templatePath) {
@Override
public String outputFile(TableInfo tableInfo) {
// 自定义输出文件名 , 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化!!
return projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
}
});
/*
cfg.setFileCreate(new IFileCreate() {
@Override
public boolean isCreate(ConfigBuilder configBuilder, FileType fileType, String filePath) {
// 判断自定义文件夹是否需要创建
checkDir("调用默认方法创建的目录,自定义目录用");
if (fileType == FileType.MAPPER) {
// 已经生成 mapper 文件判断存在,不想重新生成返回 false
return !new File(filePath).exists();
}
// 允许生成模板文件
return true;
}
});
*/
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);
// 配置模板
TemplateConfig templateConfig = new TemplateConfig();
// 配置自定义输出模板
//指定自定义模板路径,注意不要带上.ftl/.vm, 会根据使用的模板引擎自动识别
// templateConfig.setEntity("templates/entity2.java");
// templateConfig.setService();
// templateConfig.setController();
templateConfig.setXml(null);
mpg.setTemplate(templateConfig);
// 策略配置
StrategyConfig strategy = new StrategyConfig();
strategy.setNaming(NamingStrategy.underline_to_camel);
strategy.setColumnNaming(NamingStrategy.underline_to_camel);
// strategy.setSuperEntityClass("你自己的父类实体,没有就不用设置!");
// strategy.setSuperEntityClass("BaseEntity");
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
strategy.setControllerMappingHyphenStyle(true);
// 公共父类
// strategy.setSuperControllerClass("你自己的父类控制器,没有就不用设置!");
// strategy.setSuperControllerClass("BaseControllerClass");
// 写于父类中的公共字段
// strategy.setSuperEntityColumns("id");
strategy.setInclude(scanner("表名,多个英文逗号分割").split(","));
strategy.setControllerMappingHyphenStyle(true);
strategy.setTablePrefix(pc.getModuleName() + "_");
mpg.setStrategy(strategy);
mpg.setTemplateEngine(new FreemarkerTemplateEngine());
mpg.execute();
}
}
6、然后点击运行即可生成代码。
7、注意:需要在 Mybatis 中使用在 Mybatis 中使用@Mapper注解定义映射关系注解定义映射关系,在xxxMapper文件里,接口的开始处加上@Mapper
8、测试方法:
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