Graalvm将java对象传递给js时的未知标识符

Question

我正在尝试运行以下Graalvm示例代码：

package org.homi.scripting.experimental;
import org.graalvm.polyglot.*;
import java.nio.file.*;
import static java.nio.file.StandardWatchEventKinds.*;


import java.io.File;
import java.io.IOException;
public class ScriptEngine {
    
    public static class Name {
        @HostAccess.Export public String name = "hello";

        @HostAccess.Export
        public String getName() {
            return name;
        }
    }
    
    
    
    
    
    
    public static void main(String[] args) {
        Name n = new Name();
        Context context = Context.newBuilder("js")
                .allowAllAccess(true)
                .allowIO(true)
                .allowPolyglotAccess(PolyglotAccess.ALL)
                .build();
        context.getPolyglotBindings().putMember("name", n);
        context.eval("js", "var name = Polyglot.import('name');");
        context.eval("js", "console.log(name.getName())");
        
        
    }
}

我得到了一个例外：

Exception in thread "main" TypeError: invokeMember (getName) on org.homi.scripting.experimental.Name@2313052e failed due to: Unknown identifier: getName
    at <js> :program(Unnamed:1:12-25)
    at org.graalvm.sdk/org.graalvm.polyglot.Context.eval(Context.java:379)
    at ScriptEngine/org.homi.scripting.experimental.ScriptEngine.tester(ScriptEngine.java:43)
    at ScriptEngine/org.homi.scripting.experimental.ScriptEngine.main(ScriptEngine.java:29)

我是graalvm的新手，我做错了什么？我从留档（请参阅主机互操作性部分）遵循这个演示：https://www.graalvm.org/sdk/javadoc/

Answer 1

代码和堆栈跟踪不匹配，例如代码缺少tester方法

    at ScriptEngine/org.homi.scripting.experimental.ScriptEngine.tester(ScriptEngine.java:43)

当您指定allowlacess（true）时，您允许所有访问，因此主机访问不再是必需的。

问题中的代码适用于我，并按预期打印hello。