starter增加注入主键生成器.

mybatis-plus-boot-starter/src/main/java/com/baomidou/mybatisplus/autoconfigure/MybatisPlusAutoConfiguration.java

@@ -20,6 +20,7 @@ import com.baomidou.mybatisplus.core.MybatisConfiguration;
 import com.baomidou.mybatisplus.core.config.GlobalConfig;
 import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
 import com.baomidou.mybatisplus.core.incrementer.IKeyGenerator;
+import com.baomidou.mybatisplus.core.incrementer.IdGenerator;
 import com.baomidou.mybatisplus.core.injector.ISqlInjector;
 import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
 import org.apache.ibatis.annotations.Mapper;
@@ -217,6 +218,11 @@ public class MybatisPlusAutoConfiguration implements InitializingBean {
             ISqlInjector iSqlInjector = this.applicationContext.getBean(ISqlInjector.class);
             globalConfig.setSqlInjector(iSqlInjector);
         }
+        if (this.applicationContext.getBeanNamesForType(IdGenerator.class, false,
+            false).length > 0) {
+            IdGenerator idGenerator = this.applicationContext.getBean(IdGenerator.class);
+            globalConfig.setIdGenerator(idGenerator);
+        }
         // TODO 设置 GlobalConfig 到 MybatisSqlSessionFactoryBean
         factory.setGlobalConfig(globalConfig);
         return factory.getObject();