导出excel时对数值类型进行处理

src/main/java/com/uas/report/jasperreports/engine/export/CustomJRXlsExporter.java

@@ -1,11 +1,20 @@
 package com.uas.report.jasperreports.engine.export;
 
+import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
 import org.apache.poi.ss.usermodel.IndexedColors;
+import org.springframework.util.StringUtils;
 
+import net.sf.jasperreports.engine.JRException;
+import net.sf.jasperreports.engine.JRPrintText;
 import net.sf.jasperreports.engine.export.Cut;
+import net.sf.jasperreports.engine.export.JRExporterGridCell;
 import net.sf.jasperreports.engine.export.JRXlsExporter;
 import net.sf.jasperreports.engine.export.XlsRowLevelInfo;
+import net.sf.jasperreports.engine.export.data.NumberTextValue;
+import net.sf.jasperreports.engine.export.data.StringTextValue;
+import net.sf.jasperreports.engine.export.data.TextValue;
+import net.sf.jasperreports.engine.util.JRStyledText;
 
 /**
  * 报表导出为Xls
@@ -75,4 +84,59 @@ public class CustomJRXlsExporter extends JRXlsExporter {
 		}
 		return cellStyle;
 	}
+
+	@Override
+	protected void createTextCell(JRPrintText textElement, JRExporterGridCell gridCell, int colIndex, int rowIndex,
+			JRStyledText styledText, StyleInfo baseStyle, short forecolor) throws JRException {
+		if (customCellStyle) {
+			String textStr = styledText.getText();
+			TextValue textValue = getTextValue(textElement, textStr);
+			// 类型为String，但是实际值为数值，需设置为字符串类型，否则会显示绿色三角提示
+			if (textValue instanceof StringTextValue) {
+				if (isNumber(textStr)) {
+					baseStyle.setDataFormat(dataFormat.getFormat("@"));
+				}
+			}
+
+			super.createTextCell(textElement, gridCell, colIndex, rowIndex, styledText, baseStyle, forecolor);
+
+			// 数值类型需明确指定，否则会显示绿色三角提示
+			if (textValue instanceof NumberTextValue) {
+				setNumberTextValue(textStr);
+			}
+		} else {
+			super.createTextCell(textElement, gridCell, colIndex, rowIndex, styledText, baseStyle, forecolor);
+		}
+	}
+
+	/**
+	 * 判断字符串是否为数值
+	 * 
+	 * @param textStr
+	 * @return
+	 */
+	private boolean isNumber(String textStr) {
+		if (StringUtils.isEmpty(textStr)) {
+			return false;
+		}
+		try {
+			// 数值可能为1,320.6的形式
+			Double.parseDouble(textStr.replaceAll(",", ""));
+			return true;
+		} catch (NumberFormatException e) {
+			return false;
+		}
+	}
+
+	/**
+	 * 设置单元格格式为数值类型
+	 * 
+	 * @param textStr
+	 */
+	private void setNumberTextValue(String textStr) {
+		if (isNumber(textStr)) {
+			cell.setCellValue(Double.parseDouble(textStr.replaceAll(",", "")));
+			cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
+		}
+	}
 }