关于SpringBoot获取IOC容器中注入的Bean(推荐)_Java教程

关于SpringBoot获取IOC容器中注入的Bean(推荐)

2021-04-29 10:56noodles1994 Java教程

本文通过实例代码给大家详解了springboot获取ioc容器中注入的bean问题，非常不错，具有一定的参考借鉴价值，需要的朋友参考下吧

一: 注入一个testutils类

				?

									package com.shop.sell.utils; 

									import com.shop.sell.dto.cartdto; 

									import org.springframework.context.annotation.bean; 

									import org.springframework.context.annotation.configuration; 

									@configuration

									public class testutils { 

									  @bean(name="testdemo") 

									  public cartdto said() { 

									    cartdto cartdto = new cartdto(); 

									    cartdto.setproductid(789); 

									    cartdto.setproductquantity(10); 

									    return cartdto; 

									  } 

									}

二: 创建一个获取bean的公共类

				?

									package com.shop.sell.utils; 

									import org.springframework.beans.beansexception; 

									import org.springframework.context.applicationcontext; 

									import org.springframework.context.applicationcontextaware; 

									import org.springframework.stereotype.component; 

									@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; 

									    } 

									  } 

									  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); 

									  } 

									}

三: 在控制器中获取bean测试结果

				?

									package com.shop.sell.controller; 

									import com.shop.sell.utils.resultvoutil; 

									import com.shop.sell.utils.springutil; 

									import com.shop.sell.vo.productinfovo; 

									import com.shop.sell.vo.productvo; 

									import com.shop.sell.vo.resultvo; 

									import com.shop.sell.dataobject.productcategory; 

									import com.shop.sell.dataobject.productinfo; 

									import com.shop.sell.dto.cartdto; 

									import com.shop.sell.from.orderform; 

									import com.shop.sell.service.categoryservice; 

									import com.shop.sell.service.productservice; 

									import org.springframework.beans.beanutils; 

									import org.springframework.beans.factory.annotation.autowired; 

									import org.springframework.context.applicationcontext; 

									import org.springframework.web.bind.annotation.getmapping; 

									import org.springframework.web.bind.annotation.requestmapping; 

									import org.springframework.web.bind.annotation.restcontroller; 

									import java.util.arraylist; 

									import java.util.arrays; 

									import java.util.list; 

									/** 

									 * 买家商品 

									 */

									@restcontroller

									@requestmapping("/buyer/product") 

									public class buyerproductcontroller { 

									  private static applicationcontext applicationcontext; 

									  @autowired

									  private productservice productservice; 

									  @autowired

									  private categoryservice categoryservice; 

									  @getmapping(value = "/list") 

									  public cartdto list(){ 

									    cartdto cartdto = (cartdto) springutil.getbean("testdemo"); 

									    return cartdto; 

									  } 

									}