使用 jasperreport 执行报告时出错

Question

我想使用 jasper 报告库获取报告，但出现错误 "net.sf.jasperreports.engine.JRException： com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException： 1-byte UTF-8 序列的字节 1 无效。"

     private JasperPrint prepareReport(EnumList.JRList report) {
        try {
            Connection conn = getConnection();
            String jasperResource = "/reports/" + report.getName() + ".jasper";
            InputStream jasperStream = getClass().getResourceAsStream(jasperResource);
            //InputStreamReader inputStreamReader = new InputStreamReader(jasperStream, Charset.forName("UTF-8"));
            JasperReport jasperReport = 
   JasperCompileManager.compileReport(jasperStream);
            Map<String, Object> param = new HashMap<String, Object>();
            JRDesignStyle jrDesignStyle = new JRDesignStyle();
            //jrDesignStyle.setPdfEncoding("UTF-8");
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, param, conn);
            return jasperPrint;
        } catch (Exception e) {
            System.out.println("reportPrepareError: " + report.getName());
            return null;
        }
    }
   public static JasperReport compileReport(InputStream inputStream) throws JRException 
  {
        return getDefaultInstance().compile(inputStream);
    }
  public JasperReport compile(InputStream inputStream) throws JRException {
        JasperDesign jasperDesign = JRXmlLoader.load(inputStream);
        return this.compile(jasperDesign);
    }

Answer 1

.jasper文件通常包含已经编译的报告。

因此，您不需要做JasperCompileManager.compileReport(jasperStream)但是

JasperReport jasperReport = (JasperReport) JRLoader.loadObject(jasperStream);