java - JRException: Invalid byte 1 of 1-byte UTF-8 sequence -

i trying generate report using jasper reports, getting following error.

net.sf.jasperreports.engine.jrexception: com.sun.org.apache.xerces.internal.impl.io.malformedbytesequenceexception: invalid byte 1 of 1-byte utf-8 sequence.

i using java code:

    list<aluno> lista = alunoservice.findall();     string path = req.getsession().getservletcontext().getrealpath("web-inf");     jasperreport report = jaspercompilemanager.compilereport(path + "/relatorios/aluno.jasper");     jasperprint print = jasperfillmanager.fillreport(report, null, new jrbeancollectiondatasource(lista));     jasperexportmanager.exportreporttopdffile(print, path + "/relatorios/teste.pdf"); 

the error ocurring when try compile report:

jasperreport report = jaspercompilemanager.compilereport(path + "/relatorios/aluno.jasper"); 

the aluno.jrxml file in utf-8 enconding:

<?xml version="1.0" encoding="utf-8"?> 

i've researched problem, reason because jrxml filw not in utf-8 enconding. if me, thank.

java code using aluno.jrxml

    list<aluno> lista = alunoservice.findall();     string path = req.getsession().getservletcontext().getrealpath("web-inf");     jasperdesign design = jrxmlloader.load(path + "/relatorios/aluno.jrxml");     jasperreport report = jaspercompilemanager.compilereport(design);     jasperprint print = jasperfillmanager.fillreport(report, null, new jrbeancollectiondatasource(lista));     jasperexportmanager.exportreporttopdffile(print, path + "/relatorios/teste.pdf" 

the fact have <?xml version="1.0" encoding="utf-8"?> @ beginning of file doesn't mean file stored in utf-8 encoding, means "i swear file has encoding".

do have in file characters other classic ascii? (something spanish n tilde on it?)

try opening file decent editor , save again, choosing explicitly encoding utf-8 and after have @ special characters inside file see if still same.