null pointer exception

#26997

I am getting null pointer exception.once see my code
Note:I am using Ubuntu os in my system

public String convert(String patid,int pdfcnt,int needhead,String dischuser) throws FileNotFoundException, IOException, DocumentException, DaoException, Exception {
Converter1 converter = new Converter1();
List ls=dao.executeQuery("select admin.getusernm(i.userid) usernm,u.unitnm,u.unitid from ip.ipinfo i,ip.unithdr u where u.unitid=i.unit and patid='"+patid+"'");
Map mp=null;String docnm="",docid="",docregno="";String fonts="",length="";
if(ls.size()>0){
mp=(Map)ls.get(0);
usernm=mp.get("USERNM").toString();
docnm=mp.get("UNITNM").toString();
docid=mp.get("UNITID").toString();
}
mp=null;
List lst=dao.executeQuery("select nvl(drregno,0) drregno from admin.doctorinfo d,ip.unitmaster u where u.doctorid=d.docid and u.unitid='"+docid+"'");
if(lst.size()>0){
mp=(Map)lst.get(0);
docregno="0";
}
String path = dao.gettomcatserverPath1() + "webapps/wordimages/disch" +patid+ ".pdf";
List list1 = dao.executeQuery("select wordole from ip.dischargetemplate where patid='"+patid+"'");
String htmlFileName =((Map)list1.get(0)).get("WORDOLE").toString();
htmlFileName=htmlFileName.replace("$DOCNM",docnm).replace("$DOCREGNO", docregno);
File pdfFile = new File(path);
converter.runConverter(htmlFileName,pdfFile);

return "1";
}
private String runConverter(String urlstring, File output) throws IOException {

if (urlstring.length() > 0) {
if (!urlstring.startsWith("http://") && !urlstring.startsWith("file:")) {
urlstring = "http://" + urlstring;
}

java.io.FileOutputStream fos = new java.io.FileOutputStream(output);

if ( proxyHost != null && proxyHost.length() != 0 && proxyPort != 0 ) {
System.getProperties().setProperty("proxySet", "true");
System.getProperties().setProperty("proxyHost", proxyHost);
System.getProperties().setProperty("proxyPort", "" + proxyPort);
}

PD4ML pd4ml = new PD4ML();

try {
pd4ml.setPageSize( landscapeValue ? pd4ml.changePageOrientation( format ): format );
} catch (Exception e) {
e.printStackTrace();
}

if ( unitsValue.equals("mm") ) {
pd4ml.setPageInsetsMM( new Insets(topValue, leftValue,
bottomValue, rightValue) );
} else {
pd4ml.setPageInsets( new Insets(topValue, leftValue,
bottomValue, rightValue) );
}

pd4ml.setHtmlWidth( userSpaceWidth );

pd4ml.render( urlstring, fos );
}
return "1";
}

}

#29679

It would help a lot if you published an exception stack trace and the source HTML, you passed to PD4ML (hopefully there is no sensitive data in it)

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