如何在运行时获取部署应用程序的主机和端口,以便我可以在我的java方法中使用它?
答案 0 :(得分:15)
您可以通过Environment
获取port
以及使用host
可获得的InternetAddress
来获取此信息。
@Autowired
Environment environment;
......
public void somePlaceInTheCode() {
// Port
environment.getProperty("server.port");
// Local address
InetAddress.getLocalHost().getHostAddress();
InetAddress.getLocalHost().getHostName();
// Remote address
InetAddress.getLoopbackAddress().getHostAddress();
InetAddress.getLoopbackAddress().getHostName();
}
答案 1 :(得分:1)
如果您使用server.port=${random.int[10000,20000]}
之类的随机端口。然后在Java代码中使用Environment
或@Value
读取getProperty("server.port")
中的端口。 您将获得一个不可预测的端口,因为它是随机的。
ApplicationListener,您可以重写onApplicationEvent以获取设置后的端口号。
在Spring引导版本中,实现Spring接口ApplicationListener<EmbeddedServletContainerInitializedEvent>
(Spring引导版本1)或ApplicationListener<WebServerInitializedEvent>
(Spring引导版本2)覆盖onApplicationEvent以获得事实端口。
春季靴1
@Override
public void onApplicationEvent(EmbeddedServletContainerInitializedEvent event) {
int port = event.getEmbeddedServletContainer().getPort();
}
春季靴2
@Override
public void onApplicationEvent(WebServerInitializedEvent event) {
Integer port = event.getWebServer().getPort();
this.port = port;
}
答案 2 :(得分:0)
只是上述答案的完整示例
package bj;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.core.env.Environment;
import java.net.InetAddress;
import java.net.UnknownHostException;
@SuppressWarnings("SpringJavaAutowiredFieldsWarningInspection")
@SpringBootApplication
class App implements ApplicationListener<ApplicationReadyEvent> {
@Autowired
private ApplicationContext applicationContext;
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
@Override
public void onApplicationEvent(ApplicationReadyEvent event) {
try {
String ip = InetAddress.getLocalHost().getHostAddress();
int port = applicationContext.getBean(Environment.class).getProperty("server.port", Integer.class, 8080);
System.out.printf("%s:%d", ip, port);
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
}
答案 3 :(得分:0)
在运行时已绑定端口的端口可以注入为:
@Value('${local.server.port}')
private int port;
答案 4 :(得分:0)
这是一个util组件:
EnvUtil.java
(将其放入适当的包装中,成为组件。)
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* Environment util.
*/
@Component
public class EnvUtil {
@Autowired
Environment environment;
private String port;
private String hostname;
/**
* Get port.
*
* @return
*/
public String getPort() {
if (port == null) port = environment.getProperty("local.server.port");
return port;
}
/**
* Get port, as Integer.
*
* @return
*/
public Integer getPortAsInt() {
return Integer.valueOf(getPort());
}
/**
* Get hostname.
*
* @return
*/
public String getHostname() throws UnknownHostException {
// TODO ... would this cache cause issue, when network env change ???
if (hostname == null) hostname = InetAddress.getLocalHost().getHostAddress();
return hostname;
}
public String getServerUrlPrefi() throws UnknownHostException {
return "http://" + getHostname() + ":" + getPort();
}
}
示例-使用实用程序:
然后可以注入util,并调用其方法。
这是控制器中的示例:
// inject it,
@Autowired
private EnvUtil envUtil;
/**
* env
*
* @return
*/
@GetMapping(path = "/env")
@ResponseBody
public Object env() throws UnknownHostException {
Map<String, Object> map = new HashMap<>();
map.put("port", envUtil.getPort());
map.put("host", envUtil.getHostname());
return map;
}
答案 5 :(得分:-1)
主持人: 正如Anton所提到的那样
// Local address
InetAddress.getLocalHost().getHostAddress();
InetAddress.getLocalHost().getHostName();
// Remote address
InetAddress.getLoopbackAddress().getHostAddress();
InetAddress.getLoopbackAddress().getHostName();
端口: 正如Nicolai所提到的,只有在显式配置且未设置为0的情况下,才能通过environment属性检索此信息。
关于这个主题的Spring文档: https://docs.spring.io/spring-boot/docs/current/reference/html/howto-embedded-servlet-containers.html#howto-discover-the-http-port-at-runtime
对于实际的方法,这里得到了回答: Spring Boot - How to get the running port
以下是关于如何实现它的github示例: https://github.com/hosuaby/example-restful-project/blob/master/src/main/java/io/hosuaby/restful/PortHolder.java