SpringBoot(8) 整合MyBatis-Plus代码生成器
简介：
Mybatis-Plus（简称MP）是一个 Mybatis 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。
具体可看MyBatis-Plus官网：https://mp.baomidou.com/
【MyBatis-Plus入门】springboot项目整合代码生成器
项目整体结构如下：
1.创建spring boot项目：
pom文件 - springboot版本约束：
UTF-8
UTF-8
1.8
2.0.5.RELEASE
org.springframework.boot
spring-boot-dependencies
${springboot.version}
pom
import
2.新建模块 
①导入依赖：
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
com.baomidou
mybatis-plus-boot-starter
2.2.0
mysql
mysql-connector-java
②配置：
spring:
application:
name: mct
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/test
username: root
password: root
mybatis-plus:
mapper-locations: classpath:com/zhengqing/aigou/mapper/*Mapper.xml
type-aliases-package: com.zhengqing.aigou.domain,com.zhengqing.aigou.query③分页插件配置：
//Spring boot方式
@EnableTransactionManagement
@Configuration
@MapperScan("com.zhengqing.aigou.mapper")
public class MybatisPlusConfig {
@Bean //分页插件
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
}④入口类：
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class);
}
}3.新建模块 - 代码生成 
注：可以重新创建一个项目，也可以就在原来项目里面 --> 为了不影响运行的代码这里重新创建项目
①导入依赖：
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
com.baomidou
mybatis-plus-boot-starter
2.2.0
org.apache.velocity
velocity-engine-core
2.0
mysql
mysql-connector-java
②配置：
#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=E:\\IdeaProjects\\IT_zhengqing\\MyBatisPlus_parent\\mp_code_test\\src\\main\\java
#mapper.xml SQL映射文件目录
OutputDirXml=E:\\IdeaProjects\\IT_zhengqing\\MyBatisPlus_parent\\mp_code_test\\src\\main\\resources
OutputDirBase=E:\\IdeaProjects\\IT_zhengqing\\MyBatisPlus_parent\\mp_code_test\\src\\main\\java
#设置作者
author=zhengqing
#自定义包路径
parent=com.zhengqing.aigou
#数据库连接信息
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///test
jdbc.user=root
jdbc.pwd=root
package com.zhengqing.aigou.client;
import ${package.Entity}.${entity};
import com.zhengqing.aigou.query.${entity}Query;
import com.zhengqing.aigou.util.AjaxResult;
import com.zhengqing.aigou.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 = "AIGOU-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}")
${entity} get(@RequestParam(value="id",required=true) Long id);
/**
* 查看所有的员工信息
* @return
*/
@RequestMapping("/list")
public List<${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);
}package com.zhengqing.aigou.client;
import ${package.Entity}.${entity};
import com.zhengqing.aigou.query.${entity}Query;
import com.zhengqing.aigou.util.AjaxResult;
import com.zhengqing.aigou.util.PageList;
import feign.hystrix.FallbackFactory;
import org.springframework.stereotype.Component;
import java.util.List;
/**
* @author 郑清
* @date 2019/01/12-20:56
*/
@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;
}
};
}
}
package ${package.Controller};
import ${package.Service}.${table.serviceName};
import ${package.Entity}.${entity};
import com.zhengqing.aigou.query.${entity}Query;
import com.zhengqing.aigou.util.AjaxResult;
import com.zhengqing.aigou.util.PageList;
import com.baomidou.mybatisplus.plugins.Page;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
@RequestMapping("/${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
*/
@RequestMapping(value="/add",method= RequestMethod.POST)
public AjaxResult save(@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
*/
@RequestMapping(value="/delete/{id}",method=RequestMethod.DELETE)
public AjaxResult delete(@PathVariable("id") Integer 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
@RequestMapping(value = "/{id}",method = RequestMethod.GET)
public ${entity} get(@RequestParam(value="id",required=true) Long id)
{
return ${table.entityPath}Service.selectById(id);
}
/**
* 查看所有的员工信息
* @return
*/
@RequestMapping(value = "/list",method = RequestMethod.GET)
public List<${entity}> list(){
return ${table.entityPath}Service.selectList(null);
}
/**
* 分页查询数据
*
* @param query 查询对象
* @return PageList 分页对象
*/
@RequestMapping(value = "/json",method = RequestMethod.POST)
public PageList<${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());
}
}
package com.zhengqing.aigou.query;
/**
*
* @author ${author}
* @since ${date}
*/
public class ${table.entityName}Query extends BaseQuery{
}③代码生成器: 
public class GenteratorCode {
public static void main(String[] args) throws InterruptedException {
//用来获取Mybatis-Plus.properties文件的配置信息
ResourceBundle rb = ResourceBundle.getBundle("gen");
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 t_user_xxx UserXxx
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 map = new HashMap();
map.put("abc", this.getConfig().getGlobalConfig().getAuthor() + "-rb");
this.setMap(map);
}
};
List focList = new ArrayList();
// 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/zhengqing/aigou/domain/" + tableInfo.getEntityName() + ".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/zhengqing/aigou/mapper/" + tableInfo.getEntityName() + "Mapper.xml";
}
});
cfg.setFileOutConfigList(focList);
mpg.setCfg(cfg);
// 自定义模板配置，可以 copy 源码 mybatis-plus/src/main/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();
}
} ④：运行生成文件
4.测试CRUD：
//测试：增删改查+高级查询
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class MPTest {
@Autowired
private IUserService userService;
@Test
public void testAdd() throws Exception {
for (int i = 0; i < 10; i++) {
if (i % 2 == 0) {
User user = new User();
user.setName("zz-" + i);
userService.insert(user);
} else {
User user = new User();
user.setName("qq-" + i);
userService.insert(user);
}
}
}
@Test
public void testDelete() throws Exception {
userService.deleteById(1L);
}
@Test
public void testUpdate() throws Exception {
User user = userService.selectById(35L);
user.setName("修改了...");
userService.updateById(user);
user = userService.selectById(35L);
System.out.println(user);
}
@Test
public void testQuery() throws Exception {
List users = userService.selectList(null);
System.out.println(users);
}
@Test //高级查询
public void testQueryAndPage() throws Exception {
Page page = new Page<>(1, 10); //参数1：当前页 参数2：每页显示多少条数据
Wrapper wrapper = new EntityWrapper();
wrapper.like("name", "z");
userService.selectPage(page, wrapper);
System.out.println("总数:" + page.getTotal());
System.out.println(page.getRecords());
}
} 最后附上项目源码：https://pan.baidu.com/s/1F-Pkrol-A4h0Q4u7HTBB1A