“package java.net.http不存在” JDK9上的错误 [英] "package java.net.http does not exist" error on JDK9

问题描述

我在编写HttpRequest JavaDoc中的简单阻塞GET示例时遇到问题：

I have a problem compiling simple blocking GET example from the HttpRequest JavaDoc:

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);
    }
}

我收到包使用JDK 9编译时，java.net.http不存在错误：

{ jdk9 }  » /cygdrive/c/Program\ Files/Java/jdk-9/bin/javac -d out/production -modulesourcepath org.example.module1/src/ -m org.example.module1

org.example.module1\src\org.example.module1\org\example\Http2.java:6: error: package java.net.http does not exist
import java.net.http.HttpRequest;
                    ^
org.example.module1\src\org.example.module1\org\example\Http2.java:7: error: package java.net.http does not exist
import java.net.http.HttpResponse;
                    ^
org.example.module1\src\org.example.module1\org\example\Http2.java:9: error: package java.net.http does not exist
import static java.net.http.HttpRequest.noBody;
                           ^
org.example.module1\src\org.example.module1\org\example\Http2.java:9: error: static import only from classes and interfaces
import static java.net.http.HttpRequest.noBody;
^
org.example.module1\src\org.example.module1\org\example\Http2.java:10: error: package java.net.http does not exist
import static java.net.http.HttpResponse.asString;
                           ^
org.example.module1\src\org.example.module1\org\example\Http2.java:10: error: static import only from classes and interfaces
import static java.net.http.HttpResponse.asString;
^
org.example.module1\src\org.example.module1\org\example\Http2.java:14: error: cannot find symbol
        HttpResponse response = HttpRequest
        ^
  symbol:   class HttpResponse
  location: class Http2
org.example.module1\src\org.example.module1\org\example\Http2.java:14: error: cannot find symbol
        HttpResponse response = HttpRequest
                                ^
  symbol:   variable HttpRequest
  location: class Http2
org.example.module1\src\org.example.module1\org\example\Http2.java:16: error: cannot find symbol
                .body(noBody())
                      ^
  symbol:   method noBody()
  location: class Http2
org.example.module1\src\org.example.module1\org\example\Http2.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发生相同的错误。

Same error occurs using command line and IntelliJ.

我的模块没有问题，因为没有java.net.http的类编译并运行没有任何问题。

It is not a problem with my module because classes without java.net.http compiles and run without any problem.

知道发生了什么事吗？

推荐答案

在模块定义中，在 src / org / example / module-info.java 中找到（基于您的包名），您需要将依赖项添加到 java。 net.http 包，它包含在 java.httpclient 模块中：

In your module definition, located (based on your package name) in src/org/example/module-info.java, you need to add the dependency to the java.net.http package, which is included in the java.httpclient module:

module org.example {
    requires java.httpclient;
}

您可以在模块摘要。

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