SSM框架，在工具类中调用service的方法获得数据

最新推荐文章于 2025-03-18 06:11:06 发布

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最新推荐文章于 2025-03-18 06:11:06 发布

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本文链接：https://blog.youkuaiyun.com/qq_39782876/article/details/80845508

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本文介绍了如何在SSM框架下，利用SpringContextUtil工具类调用Service方法来获取数据。提供了两种方法，并引用了相关博客资源作为参考。

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1. SpringContextUtil类，这个类可以直接copy

方法1：

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author lenovo
 *
 */
@Component//注意要添加这个注解，否则获取不到数据
public class SpringContextUtil implements ApplicationContextAware {
	
	private static ApplicationContext applicationContext;

	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringContextUtil.applicationContext == null) {
			SpringContextUtil.applicationContext = applicationContext;
		}
	}

	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}
	
	public static Object getBean(String name){
		return getApplicationContext().getBean(name);		
	}
	
	public static <T>T getBean(Class<T> clazz){
		return getApplicationContext().getBean(clazz);	
	}
	
	public static <T>T getBean(String name, Class<T> clazz){
		return getApplicationContext().getBean(name,clazz);
		
	}
}

方法2：

public class SpringContextUtil implements ApplicationContextAware {
private static Logger logger = Logger.getLogger(SpringContextUtil.class);  
	    private static ApplicationContext applicationContext = null;  
	  
	    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException  
	    {  
	        logger.info("------SpringContextUtil setApplicationContext-------");  
	        SpringContextUtil.applicationContext = applicationContext;  
	    }  
	  
	    public static ApplicationContext getApplicationContext() {  
	        return applicationContext;  
	    }  
	  
	    *//** 
	     * 注意 bean name默认 = 类名(首字母小写) 
	     * 例如: A8sClusterDao = getBean("a8sClusterDao") 
	     * @param name 
	     * @return 
	     * @throws BeansException 
	     *//*  
	    public static Object getBean(String name) throws BeansException {  
	        return applicationContext.getBean(name);  
	    }  
	  
	    *//** 
	     * 根据类名获取到bean 
	     * @param <T> 
	     * @param clazz 
	     * @return 
	     * @throws BeansException 
	     *//*  
	    @SuppressWarnings("unchecked")  
	    public static <T> T getBeanByName(Class<T> clazz) throws BeansException {  
	        try {  
	            char[] cs=clazz.getSimpleName().toCharArray();  
	            cs[0] += 32;//首字母大写到小写  
	            return (T) applicationContext.getBean(String.valueOf(cs));  
	        } catch (Exception e) {  
	            e.printStackTrace();  
	            return null;  
	        }   
	    }  
	  
	    public static boolean containsBean(String name) {  
	        return applicationContext.containsBean(name);  
	    }  
	  
	    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {  
	        return applicationContext.isSingleton(name);  
	    }

2. 在工具类中添加如下

ApplicationContext appCtx = SpringContextUtil.getApplicationContext();
		DeflectionTestingService bean = appCtx.getBean(DeflectionTestingService.class);//要调用的service
		List<DeflectionTesting> list = bean.getByDataStatus();//调用service层方法获取数据

参考：https://blog.youkuaiyun.com/gwd1154978352/article/details/73480959 感谢！！！

https://blog.youkuaiyun.com/hl_smile90/article/details/76566286 感谢！！！