获取Spring中bean工具类
工具类
package com.geekmice.springbootselfexercise.utils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
* @author PMB
*/
@Component
public class SpringUtil implements ApplicationContextAware {
private static ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if (SpringUtil.applicationContext == null) {
SpringUtil.applicationContext = applicationContext;
}
// System.out.println("---------------------------------------------------------------------");
//
// System.out.println("---------------------------------------------------------------------");
//
// System.out.println("========ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext=" + SpringUtil.applicationContext + "========");
//
// System.out.println("---------------------------------------------------------------------");
// // 可以查询数据库做一些项目启动的初始化
// // IDataService iDataService = getBean(IDataService.class);
// // 可以初始化启动一些定时任务
// // QuartzManager.addJob();
// // 可以初始化设置一些SpEL参数
// System.setProperty("TopicArray", "dataTopic,weatherTopic");
}
/**
* 获取applicationContext,应用上下文
*
* @return
*/
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
/**
* 通过name获取 Bean.
*
* @param name bean名称
* @return 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
*
* @param name bean名称
* @param clazz class对象
* @param <T> 指定泛型
* @return
*/
public static <T> T getBean(String name, Class<T> clazz) {
return getApplicationContext().getBean(name, clazz);
}
}
测试类
@RestController(value = “easySqlInjector”)
@RequestMapping(value = “bean”)
@Api(tags = “3.获取bean操作”)
@Slf4j
public class BeanController {
@Bean(name = “easySqlInjector”)
public EasySqlInjector easySqlInjector(){
return new EasySqlInjector();
}
package com.geekmice.springbootselfexercise.controller;
import com.geekmice.springbootselfexercise.injector.EasySqlInjector;
import com.geekmice.springbootselfexercise.utils.AjaxResult;
import com.geekmice.springbootselfexercise.utils.SpringUtil;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @BelongsProject: spring-boot-self-exercise
* @BelongsPackage: com.geekmice.springbootselfexercise.controller
* @Author: pingmingbo
* @CreateTime: 2023-08-09 21:52
* @Description: bean操作
* @Version: 1.0
*/
@RestController(value = "easySqlInjector")
@RequestMapping(value = "bean")
@Api(tags = "3.获取bean操作")
@Slf4j
public class BeanController {
@GetMapping(value = "getBean")
public AjaxResult getBean() {
// 根据class获取bean
EasySqlInjector bean = SpringUtil.getBean(EasySqlInjector.class);
// 根据name获取bean
EasySqlInjector easySqlInjector = (EasySqlInjector)SpringUtil.getBean("easySqlInjector");
// 根据name和class获取bean
EasySqlInjector easySqlInjectorSecond = SpringUtil.getBean("easySqlInjector", EasySqlInjector.class);
log.info("easySqlInjectorSecond : [{}]" , easySqlInjectorSecond);
log.info("easySqlInjector : [{}]", easySqlInjector);
log.info("bean : [{}]", bean);
return AjaxResult.success();
}
}
文章来源:https://www.toymoban.com/news/detail-637546.html
2023-08-09 22:04:20.211 INFO 25656 — [nio-8081-exec-1] c.g.s.controller.BeanController : easySqlInjectorSecond : [com.geekmice.springbootselfexercise.injector.EasySqlInjector@935fe38]
2023-08-09 22:04:20.211 INFO 25656 — [nio-8081-exec-1] c.g.s.controller.BeanController : easySqlInjector : [com.geekmice.springbootselfexercise.injector.EasySqlInjector@935fe38]
2023-08-09 22:04:20.212 INFO 25656 — [nio-8081-exec-1] c.g.s.controller.BeanController : bean : [com.geekmice.springbootselfexercise.injector.EasySqlInjector@935fe38]文章来源地址https://www.toymoban.com/news/detail-637546.html
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