上一篇我们已经把所有需要的东西配置好了,接下来我们准备连接数据库生成代码。
首先准备一张student表:
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for student
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
`id` int(20) NOT NULL AUTO_INCREMENT COMMENT '学生id',
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '姓名',
`age` int(11) NULL DEFAULT NULL COMMENT '年龄',
`is_valid` int(11) NULL DEFAULT NULL COMMENT '是否在读',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
SET FOREIGN_KEY_CHECKS = 1;
Mybatis-Plus的代码生成器是不需要依赖spring的,所以我们可以直接在test中新建一个类CodeGeneratorDefault
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.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.Scanner;
public class CodeGeneratorDefault {
/**
*
* 读取控制台内容
*
*/
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.isNotEmpty(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("liuwenxu");
gc.setOpen(false);
gc.setSwagger2(true); // 实体属性 Swagger2 注解
mpg.setGlobalConfig(gc);
// 数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://172.30.7.143:3306/wxyj_sj?serverTimezone=UTC&characterEncoding=utf-8&useSSL=false");
// dsc.setSchemaName("public");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("wxyj");
dsc.setPassword("123456");
mpg.setDataSource(dsc);
// 包配置
PackageConfig pc = new PackageConfig();
pc.setModuleName(scanner("模块名"));
pc.setParent("com.example");
mpg.setPackageInfo(pc);
// 自定义配置
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
// to do nothing
}
};
List 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 projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
+ "/" + tableInfo.getEntityName() + "Mapper" + 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.setSuperEntityClass("com.baomidou.ant.common.BaseEntity");
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
//strategy.setSuperControllerClass("com.baomidou.ant.common.BaseController");
strategy.setInclude(scanner("表名"));
//strategy.setSuperEntityColumns("id");
strategy.setControllerMappingHyphenStyle(true);
strategy.setTablePrefix("_");
mpg.setStrategy(strategy);
mpg.setTemplateEngine(new FreemarkerTemplateEngine());
mpg.execute();
}
}
点击运行,在输入栏按照以下流程执行即可
执行后项目结构如下:
├─src
│ ├─main
│ │ ├─java
│ │ │ └─com
│ │ │ └─example
│ │ │ └─mybatisplus
│ │ │ │ MybatisPlusApplication.java
│ │ │ │
│ │ │ ├─config
│ │ │ │ SwaggerConfig.java
│ │ │ │
│ │ │ ├─controller
│ │ │ │ StudentController.java
│ │ │ │
│ │ │ ├─entity
│ │ │ │ Student.java
│ │ │ │
│ │ │ ├─mapper
│ │ │ │ StudentMapper.java
│ │ │ │
│ │ │ └─service
│ │ │ │ IStudentService.java
│ │ │ │
│ │ │ └─impl
│ │ │ StudentServiceImpl.java
│ │ │
│ │ └─resources
│ │ │ application.yml
│ │ │
│ │ ├─mapper
│ │ │ └─mybatisplus
│ │ │ StudentMapper.xml
│ │ │
│ │ ├─static
│ │ └─templates
│ │ controller-mine.java.ftl
│ │ entity-mine.java.ftl
│ │ mapper-mine.java.ftl
│ │ service-mine.java.ftl
│ │ serviceImpl-mine.java.ftl
│ │
│ └─test
│ └─java
│ CodeGenerator.java
│ CodeGeneratorDefault.java
有些小伙伴不满足于默认模板生成的文件,下面我们来演示自定义模板:
1、添加freemarker依赖:
org.freemarker
freemarker
2.3.23
2、编写自定义模板:(文末有源码链接)
controller-mine.java.ftl
entity-mine.java.ftl
mapper-mine.java.ftl
service-mine.java.ftl
serviceImpl-mine.java.ftl
3、修改代码生成器配置:
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.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.Scanner;
public class CodeGenerator {
/**
*
* 读取控制台内容
*
*/
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.isNotEmpty(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("liuwenxu");
gc.setOpen(false);
gc.setSwagger2(true); // 实体属性 Swagger2 注解
mpg.setGlobalConfig(gc);
// 数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://172.30.7.143:3306/wxyj_sj?serverTimezone=UTC&characterEncoding=utf-8&useSSL=false");
// dsc.setSchemaName("public");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("wxyj");
dsc.setPassword("123456");
mpg.setDataSource(dsc);
// 包配置
PackageConfig pc = new PackageConfig();
pc.setModuleName(scanner("模块名"));
pc.setParent("com.example");
mpg.setPackageInfo(pc);
// 自定义配置
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
// to do nothing
}
};
List 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 projectPath + "/src/main/resources/mapper/" + pc.getModuleName()
+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
}
});
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/entity-mine.java");
templateConfig.setMapper("templates/mapper-mine.java");
templateConfig.setService("templates/service-mine.java");
templateConfig.setServiceImpl("templates/serviceImpl-mine.java");
templateConfig.setController("templates/controller-mine.java");
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("com.baomidou.ant.common.BaseEntity");
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
//strategy.setSuperControllerClass("com.baomidou.ant.common.BaseController");
strategy.setInclude(scanner("表名"));
//strategy.setSuperEntityColumns("id");
strategy.setControllerMappingHyphenStyle(true);
strategy.setTablePrefix("_");
mpg.setStrategy(strategy);
mpg.setTemplateEngine(new FreemarkerTemplateEngine());
mpg.execute();
}
}