我在从HttpRequest JavaDoc编译简单的阻止GET示例时遇到问题：
package org.example;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import static java.net.http.HttpRequest.noBody;
import static java.net.http.HttpResponse.asString;
public class Http2 {
public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
HttpResponse response = HttpRequest
.create(new URI("http://www.infoq.com"))
.body(noBody())
.GET().response();
int responseCode = response.statusCode();
String responseBody = response.body(asString());
System.out.println(responseBody);
}
}
我得到package java.net.http does not exist使用JDK 9编译时错误：
{ jdk9 } » /cygdrive/c/Program Files/Java/jdk-9/bin/javac -d out/production -modulesourcepath org.example.module1/src/ -m org.example.module1
org.example.module1srcorg.example.module1orgexampleHttp2.java:6: error: package java.net.http does not exist
import java.net.http.HttpRequest;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:7: error: package java.net.http does not exist
import java.net.http.HttpResponse;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:9: error: package java.net.http does not exist
import static java.net.http.HttpRequest.noBody;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:9: error: static import only from classes and interfaces
import static java.net.http.HttpRequest.noBody;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:10: error: package java.net.http does not exist
import static java.net.http.HttpResponse.asString;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:10: error: static import only from classes and interfaces
import static java.net.http.HttpResponse.asString;
^
org.example.module1srcorg.example.module1orgexampleHttp2.java:14: error: cannot find symbol
HttpResponse response = HttpRequest
^
symbol: class HttpResponse
location: class Http2
org.example.module1srcorg.example.module1orgexampleHttp2.java:14: error: cannot find symbol
HttpResponse response = HttpRequest
^
symbol: variable HttpRequest
location: class Http2
org.example.module1srcorg.example.module1orgexampleHttp2.java:16: error: cannot find symbol
.body(noBody())
^
symbol: method noBody()
location: class Http2
org.example.module1srcorg.example.module1orgexampleHttp2.java:19: error: cannot find symbol
String responseBody = response.body(asString());
^
symbol: method asString()
location: class Http2
10 errors
使用命令行和IntelliJ会发生相同的错误。
我的模块没有问题，因为没有java.net.http的类可以编译并运行而没有任何问题。
知道发生了什么吗？
