使用jaspersoft studio在jasper报告中生成pdf条形码时显示错误

我在jrxml文件中生成条形码时遇到错误，该文件将转换为jasper文件 .

我正在使用jaspersoft studio来实现条形码 .

但实施时我面临以下错误 .

net.sf.jasperreports.engine.JRException：编译时遇到错误

报表表达式类文件：

com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer cannot be resolved to a type
value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getValue())")); 
//$JR_EXPR_ID=152$
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory cannot
be resolved to a type
value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getValue())")); 
//$JR_EXPR_ID=152$
com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer cannot
be resolved to a type
value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getOldValue())")); //$JR_EXPR_ID=152$
                        <------------------------------------------------------------->
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory cannot be resolved to a type

value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getOldValue())")); //$JR_EXPR_ID=152$
com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer cannot
be resolved to a type value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getValue())")); //$JR_EXPR_ID=152$
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory cannot
be resolved to a type
value = new com.keepdynamic.barcode.generator.jasperreports.BarcodeRenderer(
com.keepdynamic.barcode.generator.jasperreports.BarcodeFactory.createLinear(
8,"((net.sf.jasperreports.engine.JRRenderable)field_barcode.getValue())")); //$JR_EXPR_ID=152$
<------------------------------------------------------------>

errors

at  net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:215)
at net.sf.jasperreports.eclipse.builder.JasperReportCompiler.compileReport(JasperReportCompiler.java:195)
at net.sf.jasperreports.eclipse.builder.JasperReportCompiler.compileReport(JasperReportCompiler.java:91)
at net.sf.jasperreports.eclipse.builder.JasperReportsBuilder.compileJRXML(JasperReportsBuilder.java:211)
at com.jaspersoft.studio.editor.action.CompileAction.actionCompile(CompileAction.java:176)

at com.jaspersoft.studio.editor.action.CompileAction$3.run(CompileAction.java:132)

at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)