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@ -31,6 +31,8 @@ import org.apache.poi.ss.util.CellRangeAddressList;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.util.ResourceUtils;
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import com.ruoyi.common.utils.StringUtils;
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import com.ruoyi.framework.aspectj.lang.annotation.Excel;
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import com.ruoyi.framework.shiro.web.session.OnlineWebSessionManager;
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import com.ruoyi.framework.web.domain.AjaxResult;
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@ -58,28 +60,32 @@ public class ExcelUtil<T>
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Workbook workbook = WorkbookFactory.create(input);
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Sheet sheet = workbook.getSheet(sheetName);
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if (!sheetName.trim().equals(""))
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if (StringUtils.isNotEmpty(sheetName))
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{
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sheet = workbook.getSheet(sheetName); // 如果指定sheet名,则取指定sheet中的内容.
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// 如果指定sheet名,则取指定sheet中的内容.
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sheet = workbook.getSheet(sheetName);
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}
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if (sheet == null)
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{
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sheet = workbook.getSheetAt(0); // 如果传入的sheet名不存在则默认指向第1个sheet.
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// 如果传入的sheet名不存在则默认指向第1个sheet.
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sheet = workbook.getSheetAt(0);
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}
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int rows = sheet.getPhysicalNumberOfRows();
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if (rows > 0)
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{
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// 有数据时才处理
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Field[] allFields = clazz.getDeclaredFields(); // 得到类的所有field.
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Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>(); // 定义一个map用于存放列的序号和field.
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// 有数据时才处理 得到类的所有field.
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Field[] allFields = clazz.getDeclaredFields();
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// 定义一个map用于存放列的序号和field.
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Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>();
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for (int col = 0; col < allFields.length; col++)
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{
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Field field = allFields[col];
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// 将有注解的field存放到map中.
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if (field.isAnnotationPresent(Excel.class))
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{
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field.setAccessible(true);// 设置类的私有字段属性可访问.
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// 设置类的私有字段属性可访问.
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field.setAccessible(true);
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fieldsMap.put(col, field);
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}
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}
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@ -104,13 +110,15 @@ public class ExcelUtil<T>
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}
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String c = cell.getStringCellValue();
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if (c.equals(""))
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if (StringUtils.isEmpty(c))
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{
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continue;
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}
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entity = (entity == null ? clazz.newInstance() : entity);// 如果不存在实例则新建.
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Field field = fieldsMap.get(j);// 从map中得到对应列的field.
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// 如果不存在实例则新建.
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entity = (entity == null ? clazz.newInstance() : entity);
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// 从map中得到对应列的field.
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Field field = fieldsMap.get(j);
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// 取得类型,并根据对象类型设置值.
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Class<?> fieldType = field.getType();
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if (String.class == fieldType)
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@ -179,7 +187,8 @@ public class ExcelUtil<T>
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*/
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public AjaxResult exportExcel(List<T> list, String sheetName)
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{
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Field[] allFields = clazz.getDeclaredFields();// 得到所有定义字段
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// 得到所有定义字段
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Field[] allFields = clazz.getDeclaredFields();
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List<Field> fields = new ArrayList<Field>();
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// 得到所有field并存放到一个list中.
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for (Field field : allFields)
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@ -190,32 +199,39 @@ public class ExcelUtil<T>
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}
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}
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HSSFWorkbook workbook = new HSSFWorkbook();// 产生工作薄对象
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// 产生工作薄对象
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HSSFWorkbook workbook = new HSSFWorkbook();
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// excel2003中每个sheet中最多有65536行
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int sheetSize = 65536;
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double sheetNo = Math.ceil(list.size() / sheetSize);// 取出一共有多少个sheet.
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// 取出一共有多少个sheet.
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double sheetNo = Math.ceil(list.size() / sheetSize);
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for (int index = 0; index <= sheetNo; index++)
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{
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HSSFSheet sheet = workbook.createSheet();// 产生工作表对象
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// 产生工作表对象
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HSSFSheet sheet = workbook.createSheet();
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if (sheetNo == 0)
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{
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workbook.setSheetName(index, sheetName);
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}
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else
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{
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workbook.setSheetName(index, sheetName + index);// 设置工作表的名称.
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// 设置工作表的名称.
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workbook.setSheetName(index, sheetName + index);
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}
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HSSFRow row;
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HSSFCell cell; // 产生单元格
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row = sheet.createRow(0); // 产生一行
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// 产生一行
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row = sheet.createRow(0);
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// 写入各个字段的列头名称
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for (int i = 0; i < fields.size(); i++)
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{
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Field field = fields.get(i);
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Excel attr = field.getAnnotation(Excel.class);
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cell = row.createCell(i); // 创建列
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cell.setCellType(HSSFCell.CELL_TYPE_STRING); // 设置列中写入内容为String类型
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// 创建列
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cell = row.createCell(i);
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// 设置列中写入内容为String类型
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cell.setCellType(HSSFCell.CELL_TYPE_STRING);
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HSSFCellStyle cellStyle = workbook.createCellStyle();
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cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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cellStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
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@ -230,8 +246,10 @@ public class ExcelUtil<T>
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else
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{
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HSSFFont font = workbook.createFont();
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font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); // 粗体显示
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cellStyle.setFont(font); // 选择需要用到的字体格式
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// 粗体显示
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font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
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// 选择需要用到的字体格式
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cellStyle.setFont(font);
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cellStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
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// 设置列宽
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sheet.setColumnWidth(i, 3766);
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@ -240,17 +258,20 @@ public class ExcelUtil<T>
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cellStyle.setWrapText(true);
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cell.setCellStyle(cellStyle);
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cell.setCellValue(attr.name());// 写入列名
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// 写入列名
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cell.setCellValue(attr.name());
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// 如果设置了提示信息则鼠标放上去提示.
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if (!attr.prompt().trim().equals(""))
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if (StringUtils.isNotEmpty(attr.prompt()))
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{
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setHSSFPrompt(sheet, "", attr.prompt(), 1, 100, i, i); // 这里默认设了2-101列提示.
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// 这里默认设了2-101列提示.
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setHSSFPrompt(sheet, "", attr.prompt(), 1, 100, i, i);
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}
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// 如果设置了combo属性则本列只能选择不能输入
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if (attr.combo().length > 0)
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{
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setHSSFValidation(sheet, attr.combo(), 1, 100, i, i); // 这里默认设了2-101列只能选择不能输入.
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// 这里默认设了2-101列只能选择不能输入.
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setHSSFValidation(sheet, attr.combo(), 1, 100, i, i);
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}
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}
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@ -263,18 +284,22 @@ public class ExcelUtil<T>
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for (int i = startNo; i < endNo; i++)
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{
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row = sheet.createRow(i + 1 - startNo);
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T vo = (T) list.get(i); // 得到导出对象.
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// 得到导出对象.
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T vo = (T) list.get(i);
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for (int j = 0; j < fields.size(); j++)
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{
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Field field = fields.get(j); // 获得field.
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field.setAccessible(true); // 设置实体类私有属性可访问
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// 获得field.
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Field field = fields.get(j);
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// 设置实体类私有属性可访问
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field.setAccessible(true);
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Excel attr = field.getAnnotation(Excel.class);
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try
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{
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// 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
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if (attr.isExport())
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{
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cell = row.createCell(j);// 创建cell
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// 创建cell
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cell = row.createCell(j);
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cell.setCellStyle(cs);
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try
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{
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@ -292,11 +317,13 @@ public class ExcelUtil<T>
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cell.setCellType(HSSFCell.CELL_TYPE_STRING);
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if (vo == null)
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{
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cell.setCellValue(""); // 如果数据存在就填入,不存在填入空格.
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// 如果数据存在就填入,不存在填入空格.
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cell.setCellValue("");
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}
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else
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{
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cell.setCellValue(field.get(vo) == null ? "" : String.valueOf(field.get(vo)));// 如果数据存在就填入,不存在填入空格.
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// 如果数据存在就填入,不存在填入空格.
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cell.setCellValue(field.get(vo) == null ? "" : String.valueOf(field.get(vo)));
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}
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}
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@ -329,18 +356,18 @@ public class ExcelUtil<T>
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*
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* @param col
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*/
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// public static int getExcelCol(String col)
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// {
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// col = col.toUpperCase();
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// // 从-1开始计算,字母重1开始运算。这种总数下来算数正好相同。
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// int count = -1;
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// char[] cs = col.toCharArray();
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// for (int i = 0; i < cs.length; i++)
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// {
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// count += (cs[i] - 64) * Math.pow(26, cs.length - 1 - i);
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// }
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// return count;
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// }
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// public static int getExcelCol(String col)
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// {
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// col = col.toUpperCase();
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// // 从-1开始计算,字母重1开始运算。这种总数下来算数正好相同。
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// int count = -1;
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// char[] cs = col.toCharArray();
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// for (int i = 0; i < cs.length; i++)
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// {
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// count += (cs[i] - 64) * Math.pow(26, cs.length - 1 - i);
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// }
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// return count;
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// }
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/**
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* 设置单元格上提示
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@ -362,9 +389,9 @@ public class ExcelUtil<T>
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// 四个参数分别是：起始行、终止行、起始列、终止列
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CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
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// 数据有效性对象
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HSSFDataValidation data_validation_view = new HSSFDataValidation(regions, constraint);
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data_validation_view.createPromptBox(promptTitle, promptContent);
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sheet.addValidationData(data_validation_view);
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HSSFDataValidation dataValidationView = new HSSFDataValidation(regions, constraint);
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dataValidationView.createPromptBox(promptTitle, promptContent);
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sheet.addValidationData(dataValidationView);
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return sheet;
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}
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@ -387,8 +414,8 @@ public class ExcelUtil<T>
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// 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
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CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
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// 数据有效性对象
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HSSFDataValidation data_validation_list = new HSSFDataValidation(regions, constraint);
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sheet.addValidationData(data_validation_list);
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HSSFDataValidation dataValidationList = new HSSFDataValidation(regions, constraint);
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sheet.addValidationData(dataValidationList);
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return sheet;
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}
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RuoYi
7 years ago
committed by
Limy