500 Internal Server Error
Hi,
I am trying to read in a file with objects I serialized previously.
The error message and the source code was included.
I tested the program out side a Web server environment, Java WebServer
2.0, and it worked fine. I dont' see whatsoever what the problem could
be.
Thanks
---------------------- ERROR MESSAGE --------------------------------
The servlet named invoker at the requested URL
http://localhost:8080/servlet/Params00
reported this exception: PgParams. Please report this to the
administrator of the web server.
java.lang.IllegalAccessError: PgParams
at Params00.init(Compiled Code)
at com.sun.server.ServletState.callInit(ServletState.java:194)
at
com.sun.server.ServletManager.loadServlet(ServletManager.java:720)
at
com.sun.server.ServletManager.loadServlet(ServletManager.java:606)
at
com.sun.server.ServletManager.getAndLoadServletState(CompiledCode)
at com.sun.server.ServletManager.getAndLoadServletState(Compiled
Code)
at com.sun.server.ServletManager.callServletService(Compiled Code)
at com.sun.server.http.servlet.InvokerServlet.service(Compiled
Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at com.sun.server.ServletState.callService(Compiled Code)
at com.sun.server.ServletManager.callServletService(Compiled Code)
at com.sun.server.ProcessingState.invokeTargetServlet(Compiled
Code)
at com.sun.server.http.HttpProcessingState.execute(Compiled Code)
at com.sun.server.http.stages.Runner.process(Compiled Code)
at com.sun.server.ProcessingSupport.process(Compiled Code)
at com.sun.server.Service.process(Compiled Code)
at com.sun.server.http.HttpServiceHandler.handleRequest(Compiled
Code)
at
com.sun.server.http.HttpServiceHandler.handleRequest(CompiledCode)
at com.sun.server.HandlerThread.run(Compiled Code)
------------- CODE FOR SERIALIZING OBJECTS --------------------------
/* Context Page for JRFDB.SCHOLAR */
import java.io.*;
import java.util.*;
public class PgParamsSer00{
public static final int itTtlTgParams = 4;
public static final String azSecDir = "";
public static final String azCtxtPgFlNm = "Pg_Name_ParamsCtxt.bin"; //
ParametersContext file
public static void main(String[] azArgs){
String azFlNm = azSecDir + azCtxtPgFlNm;
serObj(azFlNm);
}
// --
static void serObj(String azFlNm){
PgParams[] PgPrm = new PgParams[itTtlTgParams];
// -- Constructing Objects
PgPrm[0] = new PgParams("Param00","scholar_id", 0, false);
PgPrm[1] = new PgParams("Param02","prefix", 1, false);
PgPrm[2] = new PgParams("Param04","first_name", 2, false);
PgPrm[3] = new PgParams("Param06","middle_initial", 3, false);
// -- Serializing Objects (Saving them to a file)
ObjectOutputStream OOStrm = null;
try{
File PgCtxtFl = new File(azFlNm);
FileOutputStream FlOStrm = new FileOutputStream(PgCtxtFl);
OOStrm = new ObjectOutputStream(FlOStrm);
for(int itJ = 0; itJ < itTtlTgParams; ++itJ){
OOStrm.writeObject(PgPrm[itJ].azParam);
OOStrm.writeObject(PgPrm[itJ].azDBFld);
OOStrm.writeInt(PgPrm[itJ].itIxParam);
OOStrm.writeBoolean(PgPrm[itJ].blnChckd);
} // < --
if(OOStrm != null){ OOStrm.flush(); OOStrm.close(); }
} catch (IOException IOXcptn){ IOXcptn.printStackTrace(); }
// for(int itJ = 0; itJ < itTtlTgParams; ++itJ){
System.out.println(PgPrm[itJ].toString()); }
}
}
class PgParams implements Serializable{
String azParam;
String azDBFld;
int itIxParam;
boolean blnChckd;
public PgParams(String azParam, String azDBFld, int itIxParam, boolean
blnChckd){
this.azParam = azParam; this.azDBFld = azDBFld; this.itIxParam =
itIxParam; this.blnChckd = blnChckd;
}
public PgParams(ObjectInputStream OIStrm){
try{
this.azParam = (String)OIStrm.readObject();
this.azDBFld = (String)OIStrm.readObject();
this.itIxParam = OIStrm.readInt();
this.blnChckd = OIStrm.readBoolean();
} catch(OptionalDataException OptnlDtXcptn){
OptnlDtXcptn.printStackTrace(); }
catch (ClassNotFoundException KlsNotFndXcptn){
KlsNotFndXcptn.printStackTrace(); }
catch (IOException IOXcptn){ IOXcptn.printStackTrace(); }
}
public String toString(){
String azS = "";
azS = this.azParam + "|" + this.azDBFld + "|" + this.itIxParam + "|" +
this.blnChckd;
return azS;
}
}
------------- SERVLET CODE --------------------------------
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Params00 extends HttpServlet{
public static final int itTtlTgParams = 47;
public static final String azSecDir = "";
public static final String azCtxtPgFlNm = "Pg_Name_ParamsCtxt.bin"; //
ParametersContext file
public void init(ServletConfig config) throws ServletException{
String azFlNm = azSecDir + azCtxtPgFlNm;
PgParams[] PgPrm = new PgParams[itTtlTgParams];
// -- Reconstructing Objects from File
ObjectInputStream OIStrm = null;
try{
File PgCtxtFl = new File(azFlNm);
FileInputStream FIStrm = new FileInputStream(PgCtxtFl);
OIStrm = new ObjectInputStream(FIStrm);
for(int itJ = 0; itJ < itTtlTgParams; ++itJ){ PgPrm[itJ] = new
PgParams(OIStrm); }
// for(int itJ = 0; itJ < itTtlTgParams; ++itJ){
System.out.println(PgPrm[itJ].toString()); }
if(OIStrm != null){ OIStrm.close(); }
} catch (IOException IOXcptn){ IOXcptn.printStackTrace(); }
}
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException{
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<HTML>");
out.println(" <HEAD><TITLE>IntroAppletServlet00</TITLE></HEAD>");
out.println(" <BODY>");
out.println(" <APPLET CODE=IntroApplet00.class
CODEBASE=http://localhost:8080/ WIDTH=800 HEIGHT=200>");
out.println(" </APPLET>");
out.println(" </BODY>");
out.println("</HTML>");
}
}
class PgParams implements Serializable{
String azParam;
String azDBFld;
int itIxParam;
boolean blnChckd;
public PgParams(String azParam, String azDBFld, int itIxParam, boolean
blnChckd){
this.azParam = azParam; this.azDBFld = azDBFld; this.itIxParam =
itIxParam; this.blnChckd = blnChckd;
}
public PgParams(ObjectInputStream OIStrm){
try{
this.azParam = (String)OIStrm.readObject();
this.azDBFld = (String)OIStrm.readObject();
this.itIxParam = OIStrm.readInt();
this.blnChckd = OIStrm.readBoolean();
} catch(OptionalDataException OptnlDtXcptn){
OptnlDtXcptn.printStackTrace(); }
catch (ClassNotFoundException KlsNotFndXcptn){
KlsNotFndXcptn.printStackTrace(); }
catch (IOException IOXcptn){ IOXcptn.printStackTrace(); }
}
public String toString(){
String azS = "";
azS = this.azParam + "|" + this.azDBFld + "|" + this.itIxParam + "|" +
this.blnChckd;
return azS;
}
}
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