Java 运行rmi测试程序时出错
我正在尝试运行以下两个类,但出现此错误。Java 运行rmi测试程序时出错,java,rmi,Java,Rmi,我正在尝试运行以下两个类,但出现此错误。 有人知道问题出在哪里吗 java.rmi.ConnectException: Connection refused to host: 10.0.0.2; nested exception is: java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619
有人知道问题出在哪里吗
java.rmi.ConnectException: Connection refused to host: 10.0.0.2; nested exception is:
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at RegisterWithRMIServer.main(RegisterWithRMIServer.java:9)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 5 more
import java.rmi.registry.*;
public class RegisterWithRMIServer {
/** Main method */
public static void main(String[] args) {
try {
StudentServerInterface obj = new StudentServerInterfaceImpl();
Registry registry = LocateRegistry.getRegistry();
registry.rebind("StudentServerInterfaceImpl", obj);
System.out.println("Student server " + obj + " registered");
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
java.rmi.ConnectException:拒绝主机连接:10.0.0.2;嵌套异常是:
java.net.ConnectException:连接被拒绝:连接
位于sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
位于sun.rmi.transport.tcp.tcpcchannel.createConnection(tcpcchannel.java:216)
位于sun.rmi.transport.tcp.tcpcchannel.newConnection(tcpcchannel.java:202)
位于sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
位于sun.rmi.registry.RegistryImpl_Stub.rebind(未知源)
位于RegisterWithRMIServer.main(RegisterWithRMIServer.java:9)
原因:java.net.ConnectException:连接被拒绝:连接
位于java.net.DualStackPlainSocketImpl.connect0(本机方法)
位于java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
位于java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
位于java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
位于java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
位于java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
位于java.net.socksocketimpl.connect(socksocketimpl.java:391)
位于java.net.Socket.connect(Socket.java:579)
位于java.net.Socket.connect(Socket.java:528)
位于java.net.Socket。(Socket.java:425)
位于java.net.Socket(Socket.java:208)
位于sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
位于sun.rmi.transport.proxy.rmismastersocketfactory.createSocket(rmismastersocketfactory.java:146)
位于sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 还有5个
导入java.rmi.registry.*;
公共类注册服务器{
/**主要方法*/
公共静态void main(字符串[]args){
试试{
StudentServerInterface obj=新的StudentServerInterfaceImpl();
Registry Registry=LocateRegistry.getRegistry();
registry.rebind(“StudentServerInterfaceImpl”,obj);
System.out.println(“学生服务器”+obj+“已注册”);
}
捕获(例外情况除外){
例如printStackTrace();
}
}
}
///////
import java.rmi.*;
import java.rmi.server.*;
import java.util.*;
public class StudentServerInterfaceImpl extends UnicastRemoteObject
implements StudentServerInterface {
// Stores scores in a map indexed by name
private HashMap<String, Double> scores =
new HashMap<String, Double>();
public StudentServerInterfaceImpl() throws RemoteException {
initializeStudent();
}
/** Initialize student information */
protected void initializeStudent() {
scores.put("John", new Double(90.5));
scores.put("Michael", new Double(100));
scores.put("Michelle", new Double(98.5));
}
/** Implement the findScore method from the
* Student interface */
public double findScore(String name) throws RemoteException {
Double d = (Double)scores.get(name);
if (d == null) {
System.out.println("Student " + name + " is not found ");
return -1;
}
else {
System.out.println("Student " + name + "\'s score is " + d.doubleValue());
return d.doubleValue();
}
}
}
导入java.rmi.*;
导入java.rmi.server.*;
导入java.util.*;
公共类StudentServerInterfaceImpl扩展了UnicastRemoteObject
实现StudentServerInterface{
//将分数存储在按名称索引的地图中
私有哈希映射分数=
新的HashMap();
public StudentServerInterfaceImpl()引发RemoteException{
初始化学生();
}
/**初始化学生信息*/
受保护的void initializeStudent(){
得分。推杆(“约翰”,新双(90.5));
得分。推杆(“迈克尔”,新双(100));
得分。推杆(“米歇尔”,新双(98.5));
}
/**从
*学生界面*/
公共双findScore(字符串名称)引发RemoteException{
双d=(双)分数。获取(名称);
如果(d==null){
System.out.println(“未找到学生“+姓名+”);
返回-1;
}
否则{
System.out.println(“学生”+name+“\”的分数为“+d.doubleValue());
返回d.doubleValue();
}
}
}
您启动注册表了吗。这里有一个关于RMI的简短链接
要在windows上启动注册表(如果您的操作系统是windows),您需要打开命令提示符并键入
启动注册表
否则,如果您的操作系统是Solaris或Linux
注册处&
您启动了RMI服务器吗?如果您在Windows上工作,您是否从控制面板启动了RMI服务?