执行workbook.setSheetName(workbook.getSheetIndex(outputSheet), "68");出异常，找了很久都不知道怎么解决，后来才发现是模板的Excel出了问题，模板Excel里存在许多错误的公式，吐血~~~~~
2021-02-07 17:02:59,762 [http-nio-8080-exec-9] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/mps] threw exception [Request processing failed; nested exception is java.lang.Exception: org.apache.poi.ss.formula.FormulaParseException: Second part of cell reference expected after sheet name at index 19.] with root cause
org.apache.poi.ss.formula.FormulaParseException: Second part of cell reference expected after sheet name at index 19.
at org.apache.poi.ss.formula.FormulaParser.parseRangeable(FormulaParser.java:579)
at org.apache.poi.ss.formula.FormulaParser.parseRangeExpression(FormulaParser.java:322)
at org.apache.poi.ss.formula.FormulaParser.parseSimpleFactor(FormulaParser.java:1548)
at org.apache.poi.ss.formula.FormulaParser.percentFactor(FormulaParser.java:1506)
at org.apache.poi.ss.formula.FormulaParser.powerFactor(FormulaParser.java:1493)
at org.apache.poi.ss.formula.FormulaParser.Term(FormulaParser.java:1867)
at org.apache.poi.ss.formula.FormulaParser.additiveExpression(FormulaParser.java:1994)
at org.apache.poi.ss.formula.FormulaParser.concatExpression(FormulaParser.java:1978)
at org.apache.poi.ss.formula.FormulaParser.comparisonExpression(FormulaParser.java:1935)
at org.apache.poi.ss.formula.FormulaParser.intersectionExpression(FormulaParser.java:1908)
at org.apache.poi.ss.formula.FormulaParser.unionExpression(FormulaParser.java:1889)
at org.apache.poi.ss.formula.FormulaParser.parse(FormulaParser.java:2036)
at org.apache.poi.ss.formula.FormulaParser.parse(FormulaParser.java:170)
at org.apache.poi.xssf.usermodel.helpers.XSSFFormulaUtils.updateName(XSSFFormulaUtils.java:141)
at org.apache.poi.xssf.usermodel.helpers.XSSFFormulaUtils.updateSheetName(XSSFFormulaUtils.java:78)
at org.apache.poi.xssf.usermodel.XSSFWorkbook.setSheetName(XSSFWorkbook.java:1631)
解决方法：清除Excel里奇奇怪怪无效的，不是你写的公式，可全选清了