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MyBatis-Plus是一个MyBatis框架的增强工具,在MyBatis的基础上只做增强不做改变,为简化开发、提高效率而生。对于mybatis-plus不了解的同学,可以去MyBatis-Plus官网看看。真的能让开发效率显著提高,本文就来和大家一起分享下它的代码自动生成工具。
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其实在MyBatis-Plus的官网就为我们提供了代码生成器的使用教程,它可以为完成最基本的代码生成,但是想要实现自己的效果,还需要我们自己去设置生成模板,话不多说,直接开干。
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效果展示
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableField;
import java.io.Serializable;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.*;
@Data
@EqualsAndHashCode(callSuper = false)
@Builder
@AllArgsConstructor
@NoArgsConstructor
@ApiModel(value="User对象", description="用户信息表")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
public static final String ID = "id";
public static final String USERNAME = "username";
public static final String PASSWORD = "password";
@ApiModelProperty(value = "主键")
@TableId(value = "id", type = IdType.AUTO)
private Integer id;
@ApiModelProperty(value = "用户名")
@TableField("username")
private String username;
@ApiModelProperty(value = "密码")
@TableField("password")
private String password;
}
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添加项目依赖(添加swagger和lomback是因为在生成实体类中需要用到)
<!--mybatis plus 代码自动生成工具-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.2.0</version>
</dependency>
<!--freemarker模板引擎-->
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.28</version>
</dependency>
<!--lomback-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!--mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!-- Swagger2 Begin -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
<!-- Swagger2 End -->
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编写代码生成器代码
package cn.mybatis.plus.test;
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 {
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) {
AutoGenerator mpg = new AutoGenerator();
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/src/main/java");
gc.setAuthor("pwj");
gc.setOpen(false);
gc.setSwagger2(true);
mpg.setGlobalConfig(gc);
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://127.0.0.1:3306/smart_vault?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone = GMT");
dsc.setDriverName("com.mysql.cj.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("root");
mpg.setDataSource(dsc);
PackageConfig pc = new PackageConfig();
pc.setParent("cn.mybatis.plus.test");
pc.setEntity("domain");
mpg.setPackageInfo(pc);
InjectionConfig cfg = new InjectionConfig() {
@Override
public void initMap() {
}
};
String templatePath = "/templates/mapper.xml.ftl";
List<FileOutConfig> focList = new ArrayList<>();
focList.add(new FileOutConfig(templatePath) {
@Override
public String outputFile(TableInfo tableInfo) {
return projectPath + "/src/main/resources/mapper/"
+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
}
});
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);
TemplateConfig templateConfig = new TemplateConfig();
templateConfig.setEntity("templates/entity2.java");
templateConfig.setMapper("templates/mapper2.java");
templateConfig.setController("templates/controller2.java");
templateConfig.setServiceImpl("templates/serviceImpl2.java");
templateConfig.setXml(null);
mpg.setTemplate(templateConfig);
StrategyConfig strategy = new StrategyConfig();
strategy.setNaming(NamingStrategy.underline_to_camel);
strategy.setColumnNaming(NamingStrategy.underline_to_camel);
strategy.setEntityLombokModel(true);
strategy.setRestControllerStyle(true);
strategy.setEntityColumnConstant(true);
strategy.setEntityTableFieldAnnotationEnable(true);
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();
}
}
更多的关于自动生成的配置大家可以在官网的代码生成器配置上进行了解。
- 自定义模板:controller2.java.ftl
package ${package.Controller};
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.beans.factory.annotation.Autowired;
import ${package.Service}.${table.serviceName};
<#if restControllerStyle>
import org.springframework.web.bind.annotation.RestController;
<#else>
import org.springframework.stereotype.Controller;
</#if>
<#if superControllerClassPackage??>
import ${superControllerClassPackage};
</#if>
<#if restControllerStyle>
@RestController
<#else>
@Controller
</#if>
@RequestMapping("<#if package.ModuleName??>/${package.ModuleName}</#if>/<#if controllerMappingHyphenStyle??>${controllerMappingHyphen}<#else>${table.entityPath}</#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>
@Autowired
private ${table.serviceName} service;
}
</#if>
- 自定义模板:serviceImpl2.java.ftl
package ${package.ServiceImpl};
import ${package.Entity}.${entity};
import ${package.Mapper}.${table.mapperName};
import ${package.Service}.${table.serviceName};
import ${superServiceImplClassPackage};
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
<#if kotlin>
open class ${table.serviceImplName} : ${superServiceImplClass}<${table.mapperName}, ${entity}>(), ${table.serviceName} {
}
<#else>
public class ${table.serviceImplName} extends ${superServiceImplClass}<${table.mapperName}, ${entity}> implements ${table.serviceName} {
@Autowired
private ${table.mapperName} mapper;
}
</#if>
- 自定义模板:entity2.java.ftl
package ${package.Entity};
<#list table.importPackages as pkg>
import ${pkg};
</#list>
<#if swagger2>
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
</#if>
<#if entityLombokModel>
import lombok.*;
</#if>
<#if entityLombokModel>
@Data
<#if superEntityClass??>
@EqualsAndHashCode(callSuper = true)
<#else>
@EqualsAndHashCode(callSuper = false)
</#if>
@Builder
@AllArgsConstructor
@NoArgsConstructor
</#if>
<#if table.convert>
@TableName("${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>
<#if entityColumnConstant>
<#list table.fields as field>
public static final String ${field.name?upper_case} = "${field.name}";
</#list>
</#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>
</#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} = ${field.propertyName};
<#if entityBuilderModel>
return this;
</#if>
}
</#list>
</#if>
<#if activeRecord>
@Override
protected Serializable pkVal() {
<#if keyPropertyName??>
return this.${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>
}
- 自定义模板:mapper2.java.ftl
package ${package.Mapper};
import ${package.Entity}.${entity};
import ${superMapperClassPackage};
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
@Mapper
@Repository
<#if kotlin>
interface ${table.mapperName} : ${superMapperClass}<${entity}>
<#else>
public interface ${table.mapperName} extends ${superMapperClass}<${entity}> {
}
</#if>
总结
所有的模板都可以根据个人的需求进行相应的更改,不会的都可以参照官方原来的模板进行修改,找不到的可以在com.baomidou.mybatisplus.generator包下的templates下进行寻找,附上截图。找到后将其复制到自己项目的templates目录下,在进行项目自定义修改即可(记得修改配置)。
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