From 859ba987ec292abd08ab7c1d23599d829b18b424 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 19 Sep 2026 16:21:15 +0800
Subject: [PATCH] =?UTF-8?q?javaEEday05-=E5=88=86=E5=B1=82=E8=A7=A3?=
 =?UTF-8?q?=E8=80=A6-IOC&DI-DI=E8=AF=A6=E8=A7=A3?=
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---
 .../src/main/java/com/inmind/controller/EmpController.java | 4 ++++
 .../main/java/com/inmind/service/impl/EmpServiceImplA.java | 7 +++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/springboot-web-req-resp/src/main/java/com/inmind/controller/EmpController.java b/springboot-web-req-resp/src/main/java/com/inmind/controller/EmpController.java
index 7e73178..5878a0b 100644
--- a/springboot-web-req-resp/src/main/java/com/inmind/controller/EmpController.java
+++ b/springboot-web-req-resp/src/main/java/com/inmind/controller/EmpController.java
@@ -5,7 +5,9 @@ import com.inmind.pojo.Result;
 import com.inmind.service.EmpService;
 import com.inmind.service.impl.EmpServiceImplA;
 import com.inmind.utils.XmlParserUtils;
+import jakarta.annotation.Resource;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -15,6 +17,8 @@ import java.util.List;
 public class EmpController {
     //设置一个员工业务对象
     @Autowired//运行时，IOC容器会提供该类型的bean对象，并赋值给该变量----依赖注入
+    @Qualifier("empServiceImplA") //优先级更高，比@Primary，优先级高
+    //@Resource(name = "empServiceImplB")//jdk提供的注解，不用
     private EmpService empService ;
 
     @RequestMapping("/listEmp")
diff --git a/springboot-web-req-resp/src/main/java/com/inmind/service/impl/EmpServiceImplA.java b/springboot-web-req-resp/src/main/java/com/inmind/service/impl/EmpServiceImplA.java
index 2e14be2..441bb89 100644
--- a/springboot-web-req-resp/src/main/java/com/inmind/service/impl/EmpServiceImplA.java
+++ b/springboot-web-req-resp/src/main/java/com/inmind/service/impl/EmpServiceImplA.java
@@ -4,10 +4,13 @@ import com.inmind.dao.EmpDao;
 import com.inmind.pojo.Emp;
 import com.inmind.service.EmpService;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
 
 import java.util.List;
-
-//@Component //将当前类交给IOC容器管理，让它称为IOC容器中的bean对象---IOC控制反转
+@Primary  //当DI依赖注入EmpService的变量时，优先使用当前实现类
+@Service //将当前类交给IOC容器管理，让它称为IOC容器中的bean对象---IOC控制反转
 public class EmpServiceImplA implements EmpService {
     //设置一个dao的成员变量
     @Autowired//运行时，IOC容器会提供该类型的bean对象，并赋值给该变量----依赖注入