增加Excel导入导出测试类，增加模板导出。

common/src/test/java/com/jeesite/test/utils/excel/ExcelExportTest.java

@@ -0,0 +1,92 @@
+/**
+ * Copyright (c) 2013-Now http://jeesite.com All rights reserved.
+ * No deletion without permission, or be held responsible to law.
+ */
+package com.jeesite.test.utils.excel;
+
+import com.jeesite.common.collect.ListUtils;
+import com.jeesite.common.utils.excel.ExcelExport;
+import com.jeesite.common.utils.excel.ExcelImport;
+import org.apache.poi.ss.usermodel.Row;
+
+import java.io.File;
+import java.util.List;
+
+/**
+ * 导出Excel文件测试类
+ * @author ThinkGem
+ * @version 2020-3-5
+ */
+public class ExcelExportTest {
+	
+	/**
+	 * 导出测试
+	 */
+	public static void main(String[] args) throws Throwable {
+
+		File classPath = new File(ExcelExportTest.class.getResource("/").getFile());
+		String fileName = classPath.getParentFile().getAbsoluteFile() + "/export.xlsx";
+
+		// 初始化表头
+		List<String> headerList = ListUtils.newArrayList();
+		for (int i = 1; i <= 10; i++) {
+			headerList.add("表头"+i);
+		}
+
+		// 初始化数据集
+		List<String> rowList = ListUtils.newArrayList();
+		for (int i = 1; i <= headerList.size(); i++) {
+			rowList.add("数据"+i);
+		}
+		List<List<String>> dataList = ListUtils.newArrayList();
+		for (int i = 1; i <=100; i++) {
+			dataList.add(rowList);
+		}
+
+		// 创建一个Sheet表，并导入数据
+		try(ExcelExport ee = new ExcelExport("表格1", "表格标题1", headerList, null)){
+
+			for (int i = 0; i < dataList.size(); i++) {
+				Row row = ee.addRow();
+				for (int j = 0; j < dataList.get(i).size(); j++) {
+					ee.addCell(row, j, dataList.get(i).get(j));
+				}
+			}
+
+			// 再创建一个Sheet表，并导入数据
+			ee.createSheet("表格2", "表格标题2", headerList, null);
+			for (int i = 0; i < dataList.size(); i++) {
+				Row row = ee.addRow();
+				for (int j = 0; j < dataList.get(i).size(); j++) {
+					ee.addCell(row, j, dataList.get(i).get(j)+"2");
+				}
+			}
+
+			// 输出到文件
+			ee.writeFile(fileName);
+
+		}
+
+		System.out.println("Export success.");
+
+		// 按模板导出，从第 3 行开始
+		ExcelImport ei = new ExcelImport(fileName, 3);
+		try(ExcelExport ee = new ExcelExport(ei)){
+
+			for (int i = 0; i < dataList.size(); i++) {
+				Row row = ee.addRow();
+				for (int j = 0; j < dataList.get(i).size(); j++) {
+					ee.addCell(row, j, dataList.get(i).get(j) + "-plus");
+				}
+			}
+
+			// 输出到文件
+			ee.writeFile(fileName);
+
+		}
+
+		System.out.println("Export success by template.");
+
+	}
+
+}

common/src/test/java/com/jeesite/test/utils/excel/ExcelImportTest.java

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+/**
+ * Copyright (c) 2013-Now http://jeesite.com All rights reserved.
+ * No deletion without permission, or be held responsible to law.
+ */
+package com.jeesite.test.utils.excel;
+
+import com.jeesite.common.utils.excel.ExcelImport;
+import org.apache.poi.ss.usermodel.Row;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+
+/**
+ * 导入Excel文件测试类
+ * @author ThinkGem
+ * @version 2020-3-5
+ */
+public class ExcelImportTest {
+	
+	/**
+	 * 导入测试
+	 */
+	public static void main(String[] args) throws Throwable {
+
+		File classPath = new File(ExcelExportTest.class.getResource("/").getFile());
+		String fileName = classPath.getParentFile().getAbsoluteFile() + "/export.xlsx";
+		ExcelImport ei = new ExcelImport(fileName, 1);
+
+		for (int i = ei.getDataRowNum(); i < ei.getLastDataRowNum(); i++) {
+			Row row = ei.getRow(i);
+			if (row == null){
+				continue;
+			}
+			for (int j = 0; j < ei.getLastCellNum(); j++) {
+				Object val = ei.getCellValue(row, j);
+				System.out.print(val+", ");
+			}
+			System.out.println();
+		}
+
+		System.out.println("Import success.");
+	}
+
+}