如何在Spring引导中使用Constructor Injection为不同的属性值创建相同的Bean

Question

我必须为不同的属性值创建多个相同类型的bean，这些属性值将使用构造函数注入。

目前我已经使用Bean作为Prototype并创建了多个方法来读取不同的属性来创建新对象。如何将所有不同的方法组合成单个方法，并在运行时提供不同的值来创建新bean。

    package com.demo.service;

    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.core.env.Environment;

    @Configuration
    public class ConfigClass {


@Bean(name="RC")
public JavaClient getClient(@Autowired Environment env)
{
    String sName=env.getProperty("RCSName");
    String aUrl=env.getProperty("RCAUrl");
    String dUrl=env.getProperty("RCDUrl");
    return new JavaClient(sName,aUrl,dUrl);
}

@Bean(name="O")
public JavaClient getOClient(@Autowired Environment env)
{
    String sName=env.getProperty("OSName");
    String aUrl=env.getProperty("OAUrl");
    String dUrl=env.getProperty("ODUrl");
    return new JavaClient(sName,aUrl,dUrl);
}

}

现在按照上面的代码创建了2个bean。期望：如何将getClient和getOClient组合成单个方法，但是要在循环中提供的属性来创建相同类型的多个bean JavaClient

Answer 1

我已经修改了我的ConfigClass，并通过读取文件属性创建了ApplicationContextAware以注入bean。

    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Scope;
    import org.springframework.scheduling.annotation.EnableScheduling;


    @Configuration
    @EnableScheduling
    public class ConfigClass {

        @Bean
        @Scope("prototype")
        public JavaClient getClient(String sName,String aUrl,String dUrl)
        {
            return new JavaClient(sName,aUrl,dUrl);
        }
    }

然后创建了ApplicationContextAware来创建Beans。

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Iterator;
import java.util.List;

import javax.annotation.PostConstruct;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;



@Component
public class ApplicationContextProvider implements ApplicationContextAware {

    private ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;

    } 

    public ApplicationContext getContext() {
        return applicationContext;
    }

    @PostConstruct
    public void init()
    {
        try {
            String fileName = "Url.txt";
               Resource resource = new ClassPathResource(fileName);
               File file = resource.getFile();

               List<String> lines = Files.readAllLines(file.toPath());

                for (Iterator<String> iterator = lines.iterator(); iterator.hasNext();) {
                    String line = (String) iterator.next();
                    String[] s = line.split(",");
                    applicationContext.getBean(JavaClient.class,s[0], s[1], s[2]);

                }
            } catch (IOException e) {
                e.printStackTrace();
        }
    }

}