Spring:使用构建器模式创建 bean [英] Spring: Using builder pattern to create a bean

问题描述

我使用 ektorp 连接到 CouchDB.

I use ektorp to connect to CouchDB.

构建 ektorp HttpClient 实例的方法是使用构建器模式:

The way to build an ektorp HttpClient instance is to use builder pattern:

HttpClient httpClient = new StdHttpClient.Builder()
                                .host("mychouchdbhost")
                                .port(4455)
                                .build();

我对 Spring 比较陌生.请建议我如何在我的上下文中配置 HttpClient 以通过 Builder 创建它.

I am relatively new to Spring. Please advice me on how I can configure an HttpClient in my context to create it via the Builder.

一种方法是使用 @Configuration.还有其他选择吗?

One way to do this is with @Configuration. Are any other options?

推荐答案

你可以尝试实现FactoryBean接口:

public class HttpFactoryBean implements FactoryBean<HttpClient>{

private String host;
private int port;


public HttpClient getObject() throws Exception {
    return new StdHttpClient.Builder()
                            .host(host)
                            .port(port)
                            .build();
}

public Class<? extends HttpClient> getObjectType() {
    return StdHttpClient.class;
}

public boolean isSingleton() {
    return true;
}

public void setHost(String host) {
    this.host = host;
}

public void setPort(int port) {
    this.port = port;
}}

并在配置中添加以下 bean 定义:

And add to config following bean definition:

<beans ..."> 
   <bean name="myHttpClient" class="HttpFactoryBean">
       <property name="port" value="8080"/>
       <property name="host" value="localhost"/>
   </bean>
</beans>

然后你可以把这个bean注入另一个bean，它会被解析为StdHttpClient实例.

Then you can inject this bean to another beans, it will be resolved as StdHttpClient instance.

这篇关于Spring:使用构建器模式创建 bean的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！