Java rmi 抛出各种异常
JRMITest.java
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package jrmitest;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author lisanhu-v570
*/
public class JRMITest {
private static final PrintStream out=System.out;
private static final BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
public static void main(String[] args) {
System.setSecurityManager(new RMISecurityManager());
try {
Test client=(Test)Naming.lookup("rmi://localhost:3333/obj");
System.out.println(client.getStr());
} catch (NotBoundException ex) {
Logger.getLogger(JRMITest.class.getName()).log(Level.SEVERE, null, ex);
} catch (MalformedURLException ex) {
Logger.getLogger(JRMITest.class.getName()).log(Level.SEVERE, null, ex);
} catch (RemoteException ex) {
Logger.getLogger(JRMITest.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
Test.java
package jrmitest;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Test extends Remote {
public String getStr() throws RemoteException;
}
TestImpl.java
package jrmitest;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class TestImpl extends UnicastRemoteObject implements Test {
public TestImpl() throws RemoteException{
}
public String getStr() throws RemoteException {
return "hello world";
}
}
Server.java
import java.io.PrintStream;
import java.net.MalformedURLException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
public class Server {
private static final PrintStream err=System.err;
private static final int PORT=3333;
public static void main(String[] args) {
try {
TestImpl obj=new TestImpl();
LocateRegistry.createRegistry(PORT);
Naming.bind("rmi://localhost:3333/obj", obj);
System.out.println("Remote object bind success!");
} catch (RemoteException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (AlreadyBoundException e) {
e.printStackTrace();
}
}
}
security.policy
grant {
permission java.security.AllPermission;
};
[最优解释]
问题太复杂了。。
[其他解释]
以上是代码，问题是这样的
如果把所有的文件放在同一个项目中则正常，可以删除security.policy和JRMITest.java中的System.setSecurityManager(new RMISecurityManager());
如果把文件分为两个项目
JRMITest.java Test.java为一组，
Test.java TestImpl.java Server.java为一组，运行报错
如果没有setSecrityManager那句
报：
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: Test (no security manager: RMI class loader disabled)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:101)
at jrmitest.JRMITest.main(JRMITest.java:30)
Caused by: java.lang.ClassNotFoundException: Test (no security manager: RMI class loader disabled)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:554)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646)
at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:257)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1549)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1511)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
... 3 more
如果有了那句，没有security.policy也没有设置安全参数
Exception in thread "main" java.security.AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:3333" "connect,resolve")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
at java.security.AccessController.checkPermission(AccessController.java:560)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1051)
at java.net.Socket.connect(Socket.java:574)
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)
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.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:101)
at jrmitest.JRMITest.main(JRMITest.java:30)
Java Result: 1
如果设置了security.policy后
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: Test
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:101)
at jrmitest.JRMITest.main(JRMITest.java:30)
Caused by: java.lang.ClassNotFoundException: Test
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:730)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:674)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:611)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646)
at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:257)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1549)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1511)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
... 3 more
以上异常均由客户端报出
请问应该如何解决
[其他解释]
自己顶一下自己顶一下
[其他解释]
问题解决
解决方案：把项目从netbeans中迁出到eclipse中
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