excel写入

src/com/platform/utils/excelUtils/ExcelOperation.java

@@ -1,27 +1,24 @@
 package com.platform.utils.excelUtils;
 
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.lang.reflect.Field;
+import java.util.Date;
 import java.util.List;
 
 import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
-import org.apache.poi.hssf.usermodel.HSSFFont;
-import org.apache.poi.hssf.usermodel.HSSFRow;
-import org.apache.poi.hssf.usermodel.HSSFSheet;
-import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 import org.apache.poi.hssf.util.HSSFColor;
 import org.apache.poi.xssf.usermodel.XSSFCell;
 import org.apache.poi.xssf.usermodel.XSSFCellStyle;
-import org.apache.poi.xssf.usermodel.XSSFFactory;
 import org.apache.poi.xssf.usermodel.XSSFFont;
 import org.apache.poi.xssf.usermodel.XSSFRow;
 import org.apache.poi.xssf.usermodel.XSSFSheet;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 import org.springframework.core.io.ClassPathResource;
 
+import com.base.Constant;
+
 /**
  * @author chen
  * excel2007操作
@@ -37,15 +34,17 @@ public class ExcelOperation {
 	 * @throws IllegalAccessException 
 	 * @throws IllegalArgumentException 
 	 */
-	public static XSSFWorkbook readExcelTemplate(String templateFilePath, List list) throws FileNotFoundException, IOException, IllegalArgumentException, IllegalAccessException {
-		System.out.println(templateFilePath);
+	public static XSSFWorkbook writeExcelTemplate(String templateFilePath, List list) throws FileNotFoundException, IOException, IllegalArgumentException, IllegalAccessException {
 //		InputStreamReader in= new InputStreamReader(Resource.class.getResourceAsStream(templateFilePath), "UTF-8");
 		ClassPathResource res = new ClassPathResource(templateFilePath);
-		XSSFWorkbook workbook = new XSSFWorkbook(res.getInputStream());//getAbsolutePath()
-		
+		//此处 耗时太久：（原因：excel 2007 以后采用的方式不同造成的建议升级 到 poi 3.15以上）
+		Date date = new Date();
+		XSSFWorkbook workbook = new XSSFWorkbook(res.getInputStream());
+		Date date2 = new Date();
+		System.out.println(" new XSSFWorkbook： "+ (date2.getTime()-date.getTime()));
 		
 		//从第几行 填充数据
-		int excelInitRow = 10;
+		int excelInitRow = Constant.EXCEL_TEMPLATE_INIT_ROW;
 		 //读取工作表
 		XSSFSheet sheet = workbook.getSheetAt(0);//getSheet("Sheet1");
 	    XSSFRow row;
@@ -76,6 +75,12 @@ public class ExcelOperation {
 		}
 		for (int k = 0; k < lengths; k++) {
 			sheet.autoSizeColumn(k);
+			int width = sheet.getColumnWidth(k);
+			if (width < 1600) {
+				sheet.setColumnWidth(k, 1600);
+			}else {
+				sheet.setColumnWidth(k, width + 1000);
+			}
 		}
 		return workbook; 
 	}