[Java知识库]java代码生成项目 - mybatisplus的代码生成器模块

1.创建项目并导入相关maven依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>

 <!--模板引擎-->
<dependency>
   <groupId>org.apache.velocity</groupId>
   <artifactId>velocity-engine-core</artifactId>
   <version>2.0</version>
</dependency>

<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
</dependency>

2.yml相关配置

datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test
    username: root
    password: root

3.配置相关所需properties文件(添加到resource目录下resource/mybatiesplus.properties)

#此处为本项目src所在路径（代码生成器输出路径）,注意一定是当前项目所在的目录哟
OutputDir=F:\\ideaworkspace\\mybatisplus\\src\\main\\java
#mapper.xml SQL映射文件目录
OutputDirXml=F:\\ideaworkspace\\mybatisplus\\src\\main\\resources

OutputDirBase=F:\\ideaworkspace\\mybatisplus\\src\\main\\java
#设置作者
author=chunwai
#自定义包路径
parent=com.chunwai.mybatisplus.mybatisplus

#数据库连接信息
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql:///test
jdbc.user=root
jdbc.pwd=root

4.生成代码主方法

import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.converts.MySqlTypeConvert;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;

import java.util.*;

public class GenteratorCode {

    public static void main(String[] args) throws InterruptedException {
        //用来获取Mybatisplus.properties文件的配置信息
        ResourceBundle rb = ResourceBundle.getBundle("mybatitsplus"); //不要加后缀
        AutoGenerator mpg = new AutoGenerator();
        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        gc.setOutputDir(rb.getString("OutputDir"));
        gc.setFileOverride(true);
        gc.setActiveRecord(true);// 开启 activeRecord 模式
        gc.setEnableCache(false);// XML 二级缓存
        gc.setBaseResultMap(true);// XML ResultMap
        gc.setBaseColumnList(false);// XML columList
        gc.setAuthor(rb.getString("author"));
        mpg.setGlobalConfig(gc);
        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.MYSQL);
        dsc.setTypeConvert(new MySqlTypeConvert());
        dsc.setDriverName(rb.getString("jdbc.driver"));
        dsc.setUsername(rb.getString("jdbc.user"));
        dsc.setPassword(rb.getString("jdbc.pwd"));
        dsc.setUrl(rb.getString("jdbc.url"));
        mpg.setDataSource(dsc);
        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setTablePrefix(new String[] { "t_" });// 此处可以修改为您的表前缀
        strategy.setNaming(NamingStrategy.underline_to_camel);// 表名生成策略
        strategy.setInclude(new String[]{"t_user"}); // 需要生成的表
        mpg.setStrategy(strategy);
        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent(rb.getString("parent"));
        pc.setController("controller");
        pc.setService("service");
        pc.setServiceImpl("service.impl");
        pc.setEntity("domain");
        pc.setMapper("mapper");
        mpg.setPackageInfo(pc);

        // 注入自定义配置，可以在 VM 中使用 cfg.abc 【可无】
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                Map<String, Object> map = new HashMap<String, Object>();
                map.put("abc", this.getConfig().getGlobalConfig().getAuthor() + "-rb");
                this.setMap(map);
            }
        };

        List<FileOutConfig> focList = new ArrayList<FileOutConfig>();

        // 调整 domain 生成目录演示
        focList.add(new FileOutConfig("/templates/entity.java.vm") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                return rb.getString("OutputDirBase")+ "/com/chunwai/mybatisplus/domain/" + tableInfo.getEntityName() + ".java";
            }
        });
        //query
        focList.add(new FileOutConfig("/templates/query.java.vm") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                return rb.getString("OutputDirBase")+ "/com/chunwai/mybatisplus/query/" + tableInfo.getEntityName() + "Query.java";
            }
        });

        // 调整 xml 生成目录演示
        focList.add(new FileOutConfig("/templates/mapper.xml.vm") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                return rb.getString("OutputDirXml")+ "/com/chunwai/mybatisplus/mapper/" + tableInfo.getEntityName() + "Mapper.xml";
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);

        // 自定义模板配置，可以将我提供的相关源码放到resources/templates下面内容修改，
        // 放置自己项目的 src/main/resources/templates 目录下, 默认名称一下可以不配置，也可以自定义模板名称
        TemplateConfig tc = new TemplateConfig();
        tc.setService("/templates/service.java.vm");
        tc.setServiceImpl("/templates/serviceImpl.java.vm");
        tc.setEntity(null);
        tc.setMapper("/templates/mapper.java.vm");
        //tc.setController(null);
        tc.setXml(null);
        // 如上任何一个模块如果设置 空 OR Null 将不生成该模块。
        mpg.setTemplate(tc);

        // 执行生成
        mpg.execute();
    }

}

5.mybatisplus分页插件配置

import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

//Spring boot方式
@EnableTransactionManagement
@Configuration
public class MybatisPlusConfig {

    /**
     * 分页插件
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return new PaginationInterceptor();
    }
}

?

以下为自定义模板配置相关源码

?自定义controller模板,文件名为:controller.java.vm

package ${package.Controller};

import ${package.Service}.${table.serviceName};
import ${package.Entity}.${entity};
import cn.itsource.hrm.query.${entity}Query;
import cn.itsource.hrm.util.AjaxResult;
import cn.itsource.hrm.util.PageList;
import com.baomidou.mybatisplus.plugins.Page;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/${table.entityPath}")
public class ${entity}Controller {

    @Autowired
    public ${table.serviceName} ${table.entityPath}Service;

    /**
     * 保存和修改公用的
     * @param ${table.entityPath}  传递的实体
     * @return Ajaxresult转换结果
     */
    @PutMapping
    public AjaxResult addOrUpdate(@RequestBody ${entity} ${table.entityPath}){
        try {
            if( ${table.entityPath}.getId()!=null)
                ${table.entityPath}Service.updateById(${table.entityPath});
            else
                ${table.entityPath}Service.insert(${table.entityPath});
            return AjaxResult.me();
        } catch (Exception e) {
            e.printStackTrace();
            return AjaxResult.me().setMessage("保存对象失败！"+e.getMessage());
        }
    }
    /**
    * 删除对象信息
    * @param id
    * @return
    */
    @DeleteMapping(value="/{id}")
    public AjaxResult delete(@PathVariable("id") Long id){
        try {
            ${table.entityPath}Service.deleteById(id);
            return AjaxResult.me();
        } catch (Exception e) {
        e.printStackTrace();
            return AjaxResult.me().setMessage("删除对象失败！"+e.getMessage());
        }
    }
	
    //获取用户
    @GetMapping("/{id}")
    public ${entity} get(@PathVariable("id")Long id){
        return ${table.entityPath}Service.selectById(id);
    }

    /**
    * 查看所有
    * @return
    */
    @GetMapping()
    public List<${entity}> list(){
        return ${table.entityPath}Service.selectList(null);
    }

    /**
    * 分页查询数据
    * @param query 查询对象
    * @return PageList 分页对象
    */
    @PostMapping("/list")
    public PageList<${entity}> json(@RequestBody ${entity}Query query)
    {
        Page<${entity}> page = new Page<${entity}>(query.getPage(),query.getRows());
        page = ${table.entityPath}Service.selectPage(page);
        return new PageList<${entity}>(page.getTotal(),page.getRecords());
    }
}

?自定义query模板,文件名为:query.java.vm

/**
 * @author ${author}
 * @since ${date}
 */
public class ${table.entityName}Query extends BaseQuery{
}

?自定义client模板,文件名为:client.java.vm

import ${package.Entity}.${entity};
import cn.itsource.hrm.query.${entity}Query;
import cn.itsource.hrm.util.AjaxResult;
import cn.itsource.hrm.util.PageList;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.cloud.openfeign.FeignClientsConfiguration;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@FeignClient(value = "ZUUL-GATEWAY",configuration = FeignClientsConfiguration.class,
        fallbackFactory = ${entity}ClientHystrixFallbackFactory.class)
@RequestMapping("/product/${table.entityPath}")
public interface ${entity}Client {
    /**
     * 保存和修改公用的
     * @param ${table.entityPath}  传递的实体
     * @return Ajaxresult转换结果
     */
    @RequestMapping(value="/add",method= RequestMethod.POST)
    AjaxResult save(${entity} ${table.entityPath});

    /**
     * 删除对象信息
     * @param id
     * @return
     */
    @RequestMapping(value="/delete/{id}",method=RequestMethod.DELETE)
    AjaxResult delete(@PathVariable("id") Integer id);

    //获取用户
    @RequestMapping("/{id}")
    ${entity} get(@RequestParam(value="id",required=true) Long id);

    /**
     * 查看所有
     * @return
     */
    @RequestMapping("/list")
    public List<${entity}> list();

    /**
     * 分页查询数据
     *
     * @param query 查询对象
     * @return PageList 分页对象
     */
    @RequestMapping(value = "/json",method = RequestMethod.POST)
    PageList<${entity}> json(@RequestBody ${entity}Query query);
}

?自定义ClientHystrixFallbackFactory模板,文件名为:ClientHystrixFallbackFactory.java.vm

import ${package.Entity}.${entity};
import cn.itsource.hrm.query.${entity}Query;
import cn.itsource.hrm.util.AjaxResult;
import cn.itsource.hrm.util.PageList;
import feign.hystrix.FallbackFactory;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
public class ${entity}ClientHystrixFallbackFactory implements FallbackFactory<${entity}Client> {

    @Override
    public ${entity}Client create(Throwable throwable) {
        return new ${entity}Client() {
            @Override
            public AjaxResult save(${entity} ${table.entityPath}) {
                return null;
            }

            @Override
            public AjaxResult delete(Integer id) {
                return null;
            }

            @Override
            public ${entity} get(Long id) {
                return null;
            }

            @Override
            public List<${entity}> list() {
                return null;
            }

            @Override
            public PageList<${entity}> json(${entity}Query query) {
                return null;
            }
        };
    }
}