0、工作上框架引入的poi版本是5.X,而jxls支持的poi版本是4.1.2，在idea中排除jxls的poi过后能正常导出excel，但是部署到测试环境就会报错：Cannot load XLS transformer. Please make sure a Transformer implementation is in classpath
1、源码里面是用类名去找的系统属性，然后再通过反射生成的PoiTransformer这个类，猜测poi更新版本过后可能找不到相关的系统属性了
2、解决办法：
-
排除jxls里面的poi
<properties> <jxls.version>2.9.0</jxls.version> </properties> <dependencies> <!-- jxls begin --> <dependency> <groupId>org.jxls</groupId> <artifactId>jxls</artifactId> <version>${jxls.version}</version> <exclusions> <exclusion> <groupId>ch.qos.logback</groupId> <artifactId>logback-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.jxls</groupId> <artifactId>jxls-poi</artifactId> <version>${jxls.version}</version> <exclusions> <exclusion> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> </exclusion> <exclusion> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.jxls</groupId> <artifactId>jxls-jexcel</artifactId> <version>1.0.9</version> </dependency> <!--根据jxls-cor-1.0.6修改，支持poi4.x版本--> <dependency> <groupId>net.sf.jxls</groupId> <artifactId>jxls-core</artifactId> <version>1.8</version> </dependency> <!-- jxls end --> </dependencies> -
重写jxlshelper的createTransformer方法
@Override
public Transformer createTransformer(InputStream templateStream, OutputStream targetStream)
{
PoiTransformer transformer = PoiTransformer.createTransformer(templateStream, targetStream);
// if (super.expressionNotationBegin != null && expressionNotationEnd != null) {
// transformer.getTransformationConfig().buildExpressionNotation(expressionNotationBegin,
// expressionNotationEnd);
// }
transformer.setEvaluateFormulas(false);
return transformer;
}
3、相关代码：
CusJxlsHelper类
public class CusJxlsHelper extends JxlsHelper
{
private static Logger logger = LoggerFactory.getLogger(CusJxlsHelper.class);
public static CusJxlsHelper instance()
{
return new CusJxlsHelper();
}
//重写了processTemplate这个方法
@Override
public void processTemplate(org.jxls.common.Context context, Transformer transformer) throws IOException
{
AreaBuilder areaBuilder = this.getAreaBuilder();
boolean processFormulas = this.isProcessFormulas();
areaBuilder.setTransformer(transformer);
List<Area> xlsAreaList = areaBuilder.build();
Iterator var4 = xlsAreaList.iterator();
Area xlsArea;
while (var4.hasNext())
{
xlsArea = (Area) var4.next();
xlsArea.applyAt(new CellRef(xlsArea.getStartCellRef().getCellName()), context);
}
if (processFormulas)
{
var4 = xlsAreaList.iterator();
while (var4.hasNext())
{
xlsArea = (Area) var4.next();
this.setFormulaProcessor(xlsArea);
xlsArea.processFormulas();
}
}
//增加了删除template sheet的业务控制
if (this.isDeleteTemplateSheet())
{
transformer.deleteSheet("TEMPLATE");
}
transformer.write();
}
//这里不想写的，但是不写会报错
private Area setFormulaProcessor(Area xlsArea)
{
FormulaProcessor fp = this.getFormulaProcessor();
if (fp == null)
{
if (this.isUseFastFormulaProcessor())
{
fp = new FastFormulaProcessor();
} else
{
fp = new StandardFormulaProcessor();
}
}
xlsArea.setFormulaProcessor(fp);
return xlsArea;
}
@Override
public Transformer createTransformer(InputStream templateStream, OutputStream targetStream)
{
PoiTransformer transformer = PoiTransformer.createTransformer(templateStream, targetStream);
// if (super.expressionNotationBegin != null && expressionNotationEnd != null) {
// transformer.getTransformationConfig().buildExpressionNotation(expressionNotationBegin,
// expressionNotationEnd);
// }
transformer.setEvaluateFormulas(false);
return transformer;
}
}
