java - 使用 @Scope ("prototype"从单例更改为原型(prototype))

Question

我希望/dog2 成为不同的对象，但我仍然不知道为什么 @Scope("prorotype") 不适合我。我尝试使用另一个范围，但仍然存在相同的问题 - 我转到/dog，然后转到/dog2，我在两个“Sharo”上看到，而不是在/dog2 上看到“null”

SpringProjectApplication.java

package com.example.demo.springproject;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;

import com.example.demo.springproject.entities.Animal;
import com.example.demo.springproject.entities.Dog;

@SpringBootApplication
public class SpringprojectApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringprojectApplication.class, args);
    }

    @Scope("prototype")
    @Bean
    public Animal getDog() {
        return new Dog();
    }
}

AnimalController.java

package com.example.demo.springproject.controllers;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.example.demo.springproject.entities.Animal;

@Controller
public class AnimalController {

@Autowired
private Animal dog;

@GetMapping("/dog2")
@ResponseBody
public String getDog() {
    if (dog.getName() == null) {
        return "null";
    }
    return dog.getName();
}

}

DogController.java

package com.example.demo.springproject.controllers;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.example.demo.springproject.entities.Animal;

@Controller
public class DogController {

@Autowired
private Animal dog;

@GetMapping("/dog")
@ResponseBody
public String getHomePage() {
    dog.setName("Sharo");
    return dog.getName();
}
}

编辑: 狗.java

package com.example.demo.springproject.entities;

import org.springframework.stereotype.Component;

@Component
public class Dog implements Animal {

private String name;

public Dog() {

}

@Override
public String getName() {
    return name;
}

@Override
public void setName(String name) {
    this.name = name;
}

}

Answer 1

当您应该选择其中之一时，您同时对 Dog 使用了 @Bean 和 @Component 注释。删除 @Bean 并将 @Scope 添加到 Dog 类，或者从该类中删除 @Component 注释.