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easyexcel填坑-自定义异常处理

2023-03-10 17:42 由 小强404 发表于 #后端开发

3.0版本以前listener中抛出的所有异常都会被easyexcel捕获，并且包装成ExcelAnalysisException，写法如下：

private void parseXmlSource(InputStream inputStream, ContentHandler handler) {
        InputSource inputSource = new InputSource(inputStream);
        try {
            SAXParserFactory saxFactory;
            String xlsxSAXParserFactoryName = xlsxReadContext.xlsxReadWorkbookHolder().getSaxParserFactoryName();
            if (StringUtils.isEmpty(xlsxSAXParserFactoryName)) {
                saxFactory = SAXParserFactory.newInstance();
            } else {
                saxFactory = SAXParserFactory.newInstance(xlsxSAXParserFactoryName, null);
            }
            saxFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
            saxFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
            saxFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            SAXParser saxParser = saxFactory.newSAXParser();
            XMLReader xmlReader = saxParser.getXMLReader();
            xmlReader.setContentHandler(handler);
            xmlReader.parse(inputSource);
            inputStream.close();
        } catch (ExcelAnalysisException e) {
            throw e;
        } catch (Exception e) {
            throw new ExcelAnalysisException(e);
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    throw new ExcelAnalysisException("Can not close 'inputStream'!");
                }
            }
        }
    }

3.1.5版本对此做了优化，只会包装指定的异常，代码如下：

   private void parseXmlSource(InputStream inputStream, ContentHandler handler) {
        InputSource inputSource = new InputSource(inputStream);
        try {
            SAXParserFactory saxFactory;
            String xlsxSAXParserFactoryName = xlsxReadContext.xlsxReadWorkbookHolder().getSaxParserFactoryName();
            if (StringUtils.isEmpty(xlsxSAXParserFactoryName)) {
                saxFactory = SAXParserFactory.newInstance();
            } else {
                saxFactory = SAXParserFactory.newInstance(xlsxSAXParserFactoryName, null);
            }
            try {
                saxFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
            } catch (Throwable ignore) {}
            try {
                saxFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
            } catch (Throwable ignore) {}
            try {
                saxFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            } catch (Throwable ignore) {}
            SAXParser saxParser = saxFactory.newSAXParser();
            XMLReader xmlReader = saxParser.getXMLReader();
            xmlReader.setContentHandler(handler);
            xmlReader.parse(inputSource);
            inputStream.close();
        } catch (IOException | ParserConfigurationException | SAXException e) {
            throw new ExcelAnalysisException(e);
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    throw new ExcelAnalysisException("Can not close 'inputStream'!");
                }
            }
        }
    }

 

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