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This article mainly introduces "how to call service or dao through the main method in springboot". In the daily operation, I believe that many people have doubts about how to call service or dao through the main method in springboot. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the question of "how to call service or dao through the main method in springboot". Next, please follow the editor to study!

How to call service or dao through the main method

In most cases, we use springboot to create a web project and then access it through the interface, but there are also special cases, such as the online web project, which has some special data that needs to be calculated and imported into the database. At this time, we may need some service,dao from the original web project to assist the operation, but we cannot open a new interface on the server. We perform these operations through the main method of springboot.

At this point, the service and to need to be obtained through the context.

Create a class and copy the following code import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component;/** * ordinary class calls the Spring bean object: * Note: this class needs to be placed under the same package or subpackage of App.java before it can be scanned, otherwise it will be invalid. * / @ Componentpublic class SpringUtil implements ApplicationContextAware {private static ApplicationContext applicationContext = null; @ Override public void setApplicationContext (ApplicationContext applicationContext) throws BeansException {if (SpringUtil.applicationContext = = null) {SpringUtil.applicationContext = applicationContext;}} / / get applicationContext public static ApplicationContext getApplicationContext () {return applicationContext;} / / get Bean through name. Public static Object getBean (String name) {return getApplicationContext (). GetBean (name);} / / get Bean through class. Public static T getBean (Class clazz) {return getApplicationContext () .getBean (clazz);} / return the specified Bean public static T getBean (String name,Class clazz) {return getApplicationContext () .getBean (name, clazz) through name and Clazz;}} re-create the TestApp method

Must be placed in the same directory as SpringUtilfa

Package com.example.demo.test2;import com.example.demo.controller.Aqjg_thePeriodController;import com.example.demo.mapper.AppAqjgTaskMapper;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.ApplicationContext;import java.util.List;import java.util.Map @ SpringBootApplication@MapperScan (basePackages = {"com.example.demo.mapper"}) public class TestApp {public static void main (String [] args) {SpringApplication.run (TestApp.class, args); ApplicationContext context = SpringUtil.getApplicationContext (); Aqjg_thePeriodController aqjg_thePeriodController = new Aqjg_thePeriodController (); AppAqjgTaskMapper appAqjgTaskMapper = context.getBean (AppAqjgTaskMapper.class); / / your dao or service List list = appAqjgTaskMapper.getTestSmsData () System.out.println ("done");}} get service or dao manually create tool class package com.lhw.locktest.util;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component;@Componentpublic class TherdUtil implements ApplicationContextAware {private static ApplicationContext applicationContext = null from the normal class @ Override public void setApplicationContext (ApplicationContext applicationContext) throws BeansException {if (TherdUtil.applicationContext = = null) {TherdUtil.applicationContext = applicationContext;}} / / get applicationContext public static ApplicationContext getApplicationContext () {return applicationContext;} / / get Bean through name. Public static Object getBean (String name) {return getApplicationContext (). GetBean (name);} / / get Bean through class. Public static T getBean (Class clazz) {return getApplicationContext (). GetBean (clazz);} / return the specified Bean public static T getBean (String name, Class clazz) {return getApplicationContext (). GetBean (name, clazz) through name and Clazz;}} call configuration class UserService userService = TherdUtil.getBean (UserService.class); userService.decStockNoLock () At this point, the study on "how to call service or dao through the main method in springboot" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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