详解使用Mybatis-plus + velocity模板生成自定义的代码

pom.xml文件的配置

<dependency>
  <groupid>com.baomidou</groupid>
  <artifactid>mybatis-plus-boot-starter</artifactid>
  <version>3.3.0</version>
</dependency>
<dependency>
  <groupid>com.baomidou</groupid>
  <artifactid>mybatis-plus-generator</artifactid>
  <version>3.1.0</version>
</dependency>

<!-- 代码生成器模板 -->
<dependency>
  <groupid>org.apache.velocity</groupid>
  <artifactid>velocity</artifactid>
  <version>1.7</version>
</dependency>

codegenerator配置文件

import java.text.simpledateformat;
import java.util.date;
import java.util.hashmap;
import java.util.map;

import com.baomidou.mybatisplus.annotation.dbtype;
import com.baomidou.mybatisplus.annotation.idtype;
import com.baomidou.mybatisplus.generator.autogenerator;
import com.baomidou.mybatisplus.generator.injectionconfig;
import com.baomidou.mybatisplus.generator.config.datasourceconfig;
import com.baomidou.mybatisplus.generator.config.globalconfig;
import com.baomidou.mybatisplus.generator.config.packageconfig;
import com.baomidou.mybatisplus.generator.config.strategyconfig;
import com.baomidou.mybatisplus.generator.config.templateconfig;
import com.baomidou.mybatisplus.generator.config.rules.namingstrategy;

import lombok.extern.java.log;

/**
 * 代码生成器
 */
@log
public class codegenerator {

 //项目存储位置
 public static string project_generate_disk = "e:\\";
 //包名
 public static string parent_package_name = "com";
 //包名
 public static string package_name = "rent.security";
 //数据库地址
 public static string db_url = "jdbc:mysql://localhost:3306/mp?useunicode=true&usessl=false&characterencoding=utf8&servertimezone=utc";
 //数据库实例名
 public static string driver_class_name = "com.mysql.jdbc.driver";
 //数据库用户
 public static string user = "root";
 //数据库密码
 public static string password = "root";
 //数据库schema
 public static string schema = "mp";
 //要查询的表名
 public static string table_names = "sys_role_menu";
 //创建人
 public static string author = "jmm";
 //是否强制带上注解
 public static boolean enable_table_field_annotation = false;
 //生成的注解带上idtype类型
 public static idtype table_idtype = null;
 //生成的service 接口类名是否以i开头 默认是以i开头 user表 -> iuserservice, userserviceimpl
 public static boolean service_class_name_start_withi = false;

 /**
 * 全局配置
 */
 private static globalconfig globalgenerate() {
 globalconfig config = new globalconfig();
 config.setactiverecord(false)// 不需要activerecord特性的请改为false
  .setidtype(table_idtype)
  .setenablecache(false)// xml 二级缓存
  .setauthor(author)
  .setbaseresultmap(true)// xml resultmap
  .setbasecolumnlist(false)// xml columlist
  .setoutputdir(project_generate_disk + "\\java" )
  .setfileoverride(true)
  .setcontrollername("%scontroller" );//自定义文件命名，注意 %s 会自动填充表实体属性！

 if (!service_class_name_start_withi) {
  config.setservicename("%sservice" );
 }
 return config;
 }

 /**
 * 数据源配置
 */
 private static datasourceconfig daosourcegenerate() {
 datasourceconfig datasourceconfig = new datasourceconfig();
 dbtype type = dbtype.mysql;
 datasourceconfig.setdbtype(type)//数据库类型
  .seturl(db_url)//数据库地址
  .setusername(user)//数据库用户名
  .setpassword(password)//数据库密码
  .setdrivername(driver_class_name)//实例名
  .setschemaname(schema);
 return datasourceconfig;
 }

 /**
 * 策略配置
 */
 private static strategyconfig strategygenerate() {
 strategyconfig strategyconfig = new strategyconfig();
 strategyconfig.setversionfieldname("version" )
  .setcapitalmode(true)// 全局大写命名 oracle 注意
  .setentitylombokmodel(false)
  .setnaming(namingstrategy.underline_to_camel)// 表名生成策略
  .entitytablefieldannotationenable(enable_table_field_annotation)
  .setinclude(table_names)//修改替换成你需要的表名，多个表名传数组
  .setentitycolumnconstant(true)// 【实体】是否生成字段常量（默认 false）public static final string id = "test_id";
  .setentitybuildermodel(true);// 【实体】是否为构建者模型（默认 false）public user setname(string name) {this.name = name; return this;}
 return strategyconfig;
 }

 /**
 * 自定义模板配置
 */
 private static templateconfig templategenerate() {
 templateconfig templateconfig = new templateconfig()
  .setcontroller("templates/java/controller.java" )
  .setservice("templates/java/service.java" )
  .setserviceimpl("templates/java/serviceimpl.java" )
  .setmapper("templates/java/mapper.java" );
 return templateconfig;
 }

 private static final string module_name = "sysrolemenu";

 private static final string class_name = "sysrolemenu";

 private static final string class_name = "sysrolemenu";

 /**
 * 自定义文件及key
 */
 private static injectionconfig filegenerate() {
 injectionconfig injectionconfig = new injectionconfig() {
  @override
  public void initmap() {//自定义参数
  map<string, object> map = new hashmap<>();
  //这些自定义的值在vm模板的语法是通过${cfg.xxx}来调用的。
  map.put("modulename", module_name);
  map.put("classname", class_name);
  map.put("classname", class_name);
  map.put("packagename", parent_package_name + "." + package_name);
  map.put("author", author);
  map.put("datetime", new simpledateformat("yyyy-mm-dd hh:mm:ss").format(new date()));
  this.setmap(map);
  }
 };
 return injectionconfig;
 }

 /**
 * 包配置
 */
 public static packageconfig packagegenerate() {
 packageconfig pc = new packageconfig().setparent("com" )
  .setmodulename(package_name)
  .setcontroller("controller")
  .setentity("domain")
  .setmapper("dao")
  .setxml("mapper");
 return pc;
 }

 public static void main(string[] args) {
 //全局配置
 globalconfig config = globalgenerate();
 //配置数据源
 datasourceconfig datasourceconfig = daosourcegenerate();
 //配置策略
 strategyconfig strategyconfig = strategygenerate();
 //配置模板
 templateconfig templateconfig = templategenerate();
 //自定义值
 injectionconfig injectionconfig = filegenerate();
 //配置包
 packageconfig packageconfig = packagegenerate();
 //生成代码
 new autogenerator().setglobalconfig(config)
  .settemplate(templateconfig)//自定义模板路径
  .setcfg(injectionconfig)
  .setdatasource(datasourceconfig)
  .setstrategy(strategyconfig)
  .setpackageinfo(packageconfig)
  .execute();
 }
}

一定要注意！！！injectionconfig方法中自定义的map返回对象可以返回给模板调用，调用方法是${cfg.xxx}

vm模板代码实例

package ${package.controller}; //这样写是依据步骤2的packageconfig方法配置

import java.util.list;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.getmapping;
import org.springframework.web.bind.annotation.pathvariable;
import org.springframework.web.bind.annotation.postmapping;
import org.springframework.web.bind.annotation.requestmapping;
import ${package.entity}.${cfg.classname};
import ${package.service}.${cfg.classname}service;
import com.rent.model.ajaxresult;

/**
 * ${cfg.modulename}controller
 *
 * @author ${author}
 * @date ${cfg.datetime}
 */
@controller
@requestmapping("/${cfg.modulename}/${cfg.classname}")
public class ${cfg.classname}controller extends basecontroller

  @autowired
  private ${cfg.classname}service ${cfg.classname}service;

  /**
   * 查询${cfg.classname}列表
   */
  @getmapping("/list")
  public tabledatainfo list(@requestparam int pagenumber, @requestparam int pagesize) {

 page<${cfg.classname}> page = ${cfg.classname}service.select${cfg.classname}page(pagenumber, pagesize);
 return page;
  }

  /**
   * 新增保存${cfg.classname}
   */
  @postmapping("/add${cfg.classname}")
  public ajaxresult addsave(${cfg.classname} ${cfg.classname}) {

 boolean ret = ${cfg.classname}service.save(${cfg.classname});
 return new ajaxresult(ret, ret ? "成功" : "失败");
  }

  /**
   * 修改保存${cfg.classname}
   */
  @postmapping("/edit")
  public ajaxresult editsave(${cfg.classname} ${cfg.classname}) {

 boolean ret = ${cfg.classname}service.updatebyid(${cfg.classname});
 return new ajaxresult(ret, ret ? "成功" : "失败");
  }

 @postmapping("deletebyid")
 @apioperation("根据id删除${cfg.classname}")
 public ajaxresult<${cfg.classname}> deletebyid(long id) {
 boolean ret = ${cfg.classname}service.removebyid(id);
 return new ajaxresult(true, ret ? "成功" : "失败");
 }

 @postmapping("findbyid")
 @apioperation("根据id查询${cfg.classname}")
 public ajaxresult<${cfg.classname}> findbyid(long id) {
 ${cfg.classname} user = ${cfg.classname}service.getbyid(id);
 return new ajaxresult(true, "成功", user);
 }
}

最后如果需要更详细的vm调用请参阅官方文档：

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