Question

我使用Java + Jersey + JNA（https://mvnrepository.com/artifact/net.java.dev.jna/jna/4.5.2）在Delphi中访问DLL文件。

我的操作系统是Windowns 10（64位）。该dll以64位元生成。

我只是试图访问Java中的DLL方法。

Java的代码是：

DllSimples.java

import com.sun.jna.Library;
import com.sun.jna.Native;

public interface DllSimples extends Library{

    String testar(); 
}

TesteService.java

public Response chamaDll() {

    DllSimples calculadora = (DllSimples)
              Native.loadLibrary("teste", DllSimples.class);

    String parametro = calculadora.testar();

    MensageiroDTO mensagem = new MensageiroDTO(parametro);
    return Response.ok(mensagem).build();
}

pom.xml

<dependency>
    <groupId>net.java.dev.jna</groupId>
    <artifactId>jna</artifactId>
    <version>4.5.2</version>
</dependency>

错误：

javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.Error: Invalid memory access
    org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:432)
    org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:370)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:389)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:342)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:229)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.glassfish.jersey.server.ContainerException: java.lang.Error: Invalid memory access
    org.glassfish.jersey.servlet.internal.ResponseWriter.rethrow(ResponseWriter.java:278)
    org.glassfish.jersey.servlet.internal.ResponseWriter.failure(ResponseWriter.java:260)
    org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:460)
    org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:285)
    org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
    org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
    org.glassfish.jersey.internal.Errors.process(Errors.java:315)
    org.glassfish.jersey.internal.Errors.process(Errors.java:297)
    org.glassfish.jersey.internal.Errors.process(Errors.java:267)
    org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:289)
    org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:256)
    org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:703)
    org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:416)
    org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:370)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:389)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:342)
    org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:229)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

注意：该DLL已预先在DELPHI语言中进行了测试，并且正在运行。

尝试在Java中调用DLL时出现错误：java.lang.Error：无效的内存访问

0 个答案: