[英]Permission check failed in J2ME Socket program
我想通過“我的電腦”主機(服務器)和Raspberry pi板(客戶端)之間的套接字進行通信。 我使用以下代碼:
對於服務器
public void startApp() {
try
{
ServerSocketConnection ssc = (ServerSocketConnection)
Connector.open("socket://:9002");
StreamConnection sc = null;
InputStream is = null;
try{
sc = ssc.acceptAndOpen();
is = sc.openInputStream();
int ch = 0;
StringBuffer sb = new StringBuffer();
while ((ch = is.read()) != -1){
sb.append((char)ch);
}
System.out.println(sb.toString());
} finally{
ssc.close();
sc.close();
is.close();
}
} catch (IOException x) {
x.printStackTrace();
}
}
對於客戶
try{
SocketConnection sc = (SocketConnection)
Connector.open("socket://10.91.40.145:9002");
OutputStream os = null;
try{
os = sc.openOutputStream();
byte[] data = "Hello from a socket!".getBytes();
os.write(data);
} finally{
sc.close();
os.close();
}
} catch (IOException x){
x.printStackTrace();
}
在Raspberry pi上運行客戶端時,出現以下日志:
Java is starting. Press Ctrl-C to exit
[CRITICAL] [SECURITY] iso=2:Permission check failed: javax.microedition.io.SocketProtocolPermission "socket://10.91.40.145:9002" ""
TRACE: <at java.security.AccessControlException: >, startApp threw an Exception
java.security.AccessControlException:
- com/oracle/meep/security/AccessControllerInternal.checkPermission(), bci=128
- java/security/AccessController.checkPermission(), bci=1
- com/sun/midp/io/j2me/socket/Protocol.open(), bci=127
- com/sun/midp/io/j2me/socket/Protocol.openPrim(), bci=4
- javax/microedition/io/Connector.open(), bci=77
- javax/microedition/io/Connector.open(), bci=6
- javax/microedition/io/Connector.open(), bci=3
- smartgridapidemopi/SmartGridAPIdemoPI.startApp(SmartGridAPIdemoPI.java:48)
- javax/microedition/midlet/MIDletTunnelImpl.callStartApp(), bci=1
- com/sun/midp/midlet/MIDletPeer.startApp(), bci=5
- com/sun/midp/midlet/MIDletStateHandler.startSuite(), bci=264
- com/sun/midp/main/AbstractMIDletSuiteLoader.startSuite(), bci=38
- com/sun/midp/main/CldcMIDletSuiteLoader.startSuite(), bci=5
- com/sun/midp/main/AbstractMIDletSuiteLoader.runMIDletSuite(), bci=132
- com/sun/midp/main/AppIsolateMIDletSuiteLoader.main(), bci=26
java.security.AccessControlException:
- com/oracle/meep/security/AccessControllerInternal.checkPermission(), bci=[ERROR] [AMS] iso=1:Sending the notification: com.oracle.midp.proxy.RunCommand@d17b7662. FAILED, proxy is disconnected
128
- java/security/AccessController.checkPermission(), bci=1
- com/sun/midp/io/j2me/socket/Protocol.open(), bci=127
- com/sun/midp/io/j2me/socket/Protocol.openPrim(), bci=4
- javax/microedition/io/Connector.open(), bci=77
- javax/microedition/io/Connector.open(), bci=6
- javax/microedition/io/Connector.open(), bci=3
- smartgridapidemopi/SmartGridAPIdemoPI.startApp(SmartGridAPIdemoPI.java:48)
- javax/microedition/midlet/MIDletTunnelImpl.callStartApp(), bci=1
- com/sun/midp/midlet/MIDletPeer.startApp(), bci=5
- com/sun/midp/midlet/MIDletStateHandler.startSuite(), bci=264
- com/sun/midp/main/AbstractMIDletSuiteLoader.startSuite(), bci=38
- com/sun/midp/main/CldcMIDletSuiteLoader.startSuite(), bci=5
- com/sun/midp/main/AbstractMIDletSuiteLoader.runMIDletSuite(), bci=132
- com/sun/midp/main/AppIsolateMIDletSuiteLoader.main(), bci=26
[ERROR] [AMS] iso=1:Sending the notification: com.oracle.midp.proxy.RunCommand@d17b76f0. FAILED, proxy is disconnected
[ERROR] [AMS] iso=1:Sending the notification: com.oracle.midp.proxy.StopCommand@d17b76ff. FAILED, proxy is disconnected
如何處理此AccessControlException。
端口9002被防火牆或防病毒軟件關閉。 檢查端口可用性。
提供API權限javax.microedition.io.SocketProtocolPermission(“ socket:// : ”)javax.microedition.io.SocketProtocolPermission(“ socket://:*”)
在您的jad文件中
您可以通過導航項目屬性-> Application Descriptor或選擇API Permission選項卡在netbeans中進行操作。
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