如何通过main方法调用service或dao
大多数情况下，我们使用springboot是创建一个web项目，然后通过接口访问，但是也有特殊情况，比如线上跑着的web项目，有一些特殊的数据，需要经过计算导入到数据库，这个时候，我们可能需要原来的web项目中的一些service，dao才辅助操作，但是又不能在服务端新开接口。我们通过springboot的main方法执行这些操作。
此时，service和到需要通过上下文获得。
创建类，并复制下面代码
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import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; /** * 普通类调用Spring bean对象： * 注意：此类需要放到App.java同包或者子包下才能被扫描，否则失效。 */ @Component public class SpringUtil implements ApplicationContextAware{ private static ApplicationContext applicationContext = null ; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if (SpringUtil.applicationContext == null ){ SpringUtil.applicationContext = applicationContext; } } //获取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通过name获取 Bean. public static Object getBean(String name){ return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } //通过name,以及Clazz返回指定的Bean public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } } |
再创建TestApp方法
必须跟SpringUtilfa放到同一目录下
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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 ); //你的dao或service List<Map<String,Object>> list = appAqjgTaskMapper.getTestSmsData(); System.out.println( "完成" ); } } |
在普通类中获取service或者dao
手动创建工具类
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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; @Component public class TherdUtil implements ApplicationContextAware { private static ApplicationContext applicationContext = null ; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if (TherdUtil.applicationContext == null ) { TherdUtil.applicationContext = applicationContext; } } //获取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通过name获取 Bean. public static Object getBean(String name) { return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz) { return getApplicationContext().getBean(clazz); } //通过name,以及Clazz返回指定的Bean public static <T> T getBean(String name, Class<T> clazz) { return getApplicationContext().getBean(name, clazz); } } |
调用配置类
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UserService userService = TherdUtil.getBean(UserService. class ); userService.decStockNoLock(); |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
原文链接：http://yaoyaoman.cn/blog/archives/116
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