Spring--循环依赖的解决方案--实例

系统管理员 2023-09-28 11:11 14阅读 0赞

原文网址：[Spring--循环依赖的解决方案--实例\_IT利刃出鞘的博客-CSDN博客][Spring--_--_IT_-CSDN]

## 简介 ##

**说明**

本文用实例介绍如何解决Spring的循环依赖问题。

**相关网址**

[Spring--循环依赖导致启动失败\_IT利刃出鞘的博客-CSDN博客\_springboot 配置循环依赖][Spring--_IT_-CSDN_springboot]

**公共代码**

package com.example.controller;
    
    import com.example.tmp.A;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloController {
        @Autowired
        private A a;
    
        @GetMapping("/test1")
        public String test1() {
            return a.getTest();
        }
    }

## 方案1. Feild注入单例（@AutoWired） ##

**代码**

package com.example.tmp;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
     
    @Component
    public class A {
        @Autowired
        private B b;
     
        private String name = "Tony";
     
        public String getName() {
            return name;
        }
     
        public void setName(String name) {
            this.name = name;
        }
     
        public String getTest() {
            return b.getAge().toString() + name;
        }
    }

package com.example.tmp;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
     
    @Component
    public class B {
        @Autowired
        private A a;
     
        private Integer age = 20;
     
        public Integer getAge() {
            return age;
        }
     
        public void setAge(Integer age) {
            this.age = age;
        }
    
    }

**测试**

> 启动不报错。

> postman访问：[http://localhost:8080/test1][http_localhost_8080_test1]
> 
> 后端结果：不报错
> 
> postman结果: 20Tony

上边只是部分内容，为便于维护，本文已迁移到此地址：[Spring-循环依赖的解决方案-实例 - 自学精灵][Spring-_-_ -]

[Spring--_--_IT_-CSDN]: https://knife.blog.csdn.net/article/details/125358333
[Spring--_IT_-CSDN_springboot]: https://knife.blog.csdn.net/article/details/120407487
[http_localhost_8080_test1]: http://localhost:8080/test1
[Spring-_-_ -]: https://learn.skyofit.com/archives/877