409 lines
17 KiB
Java
409 lines
17 KiB
Java
package com.ruoyi.common.utils.poi;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.lang.reflect.Field;
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import java.math.BigDecimal;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.UUID;
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import org.apache.poi.hssf.usermodel.DVConstraint;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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import org.apache.poi.hssf.usermodel.HSSFDataValidation;
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import org.apache.poi.hssf.usermodel.HSSFFont;
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import org.apache.poi.hssf.usermodel.HSSFRow;
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import org.apache.poi.hssf.usermodel.HSSFSheet;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import org.apache.poi.hssf.util.HSSFColor;
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import org.apache.poi.ss.usermodel.Cell;
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import org.apache.poi.ss.usermodel.CellStyle;
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import org.apache.poi.ss.usermodel.Row;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.poi.ss.usermodel.WorkbookFactory;
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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.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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/**
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* Excel相关处理
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*
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* @author ruoyi
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*/
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public class ExcelUtil<T>
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{
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private static final Logger log = LoggerFactory.getLogger(OnlineWebSessionManager.class);
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public Class<T> clazz;
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public ExcelUtil(Class<T> clazz)
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{
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this.clazz = clazz;
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}
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public List<T> importExcel(String sheetName, InputStream input) throws Exception
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{
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List<T> list = new ArrayList<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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{
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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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}
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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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}
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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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for (Field field : allFields)
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{
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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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Excel attr = field.getAnnotation(Excel.class);
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int col = getExcelCol(attr.column());// 获得列号
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field.setAccessible(true);// 设置类的私有字段属性可访问.
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fieldsMap.put(col, field);
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}
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}
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for (int i = 1; i < rows; i++)
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{
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// 从第2行开始取数据,默认第一行是表头.
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Row row = sheet.getRow(i);
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int cellNum = sheet.getRow(0).getPhysicalNumberOfCells();
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T entity = null;
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for (int j = 0; j < cellNum; j++)
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{
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Cell cell = row.getCell(j);
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if (cell == null)
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{
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continue;
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}
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else
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{
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// 先设置Cell的类型，然后就可以把纯数字作为String类型读进来了 by zhuyangyong 20171228
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row.getCell(j).setCellType(Cell.CELL_TYPE_STRING);
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cell = row.getCell(j);
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}
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String c = cell.getStringCellValue();
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if (c.equals(""))
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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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// 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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{
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field.set(entity, String.valueOf(c));
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}
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else if ((Integer.TYPE == fieldType) || (Integer.class == fieldType))
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{
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field.set(entity, Integer.parseInt(c));
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}
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else if ((Long.TYPE == fieldType) || (Long.class == fieldType))
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{
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field.set(entity, Long.valueOf(c));
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}
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else if ((Float.TYPE == fieldType) || (Float.class == fieldType))
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{
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field.set(entity, Float.valueOf(c));
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}
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else if ((Short.TYPE == fieldType) || (Short.class == fieldType))
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{
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field.set(entity, Short.valueOf(c));
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}
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else if ((Double.TYPE == fieldType) || (Double.class == fieldType))
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{
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field.set(entity, Double.valueOf(c));
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}
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else if (Character.TYPE == fieldType)
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{
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if ((c != null) && (c.length() > 0))
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{
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field.set(entity, Character.valueOf(c.charAt(0)));
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}
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}
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else if (java.util.Date.class == fieldType)
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{
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if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC)
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{
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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cell.setCellValue(sdf.format(cell.getNumericCellValue()));
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c = sdf.format(cell.getNumericCellValue());
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}
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else
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{
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c = cell.getStringCellValue();
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}
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}
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else if (java.math.BigDecimal.class == fieldType)
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{
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c = cell.getStringCellValue();
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}
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}
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if (entity != null)
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{
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list.add(entity);
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}
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}
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}
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return list;
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}
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/**
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* 对list数据源将其里面的数据导入到excel表单
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*
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* @param sheetName 工作表的名称
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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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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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{
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if (field.isAnnotationPresent(Excel.class))
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{
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fields.add(field);
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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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// 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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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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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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}
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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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// 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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int col = getExcelCol(attr.column()); // 获得列号
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cell = row.createCell(col); // 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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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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if (attr.name().indexOf("注：") >= 0)
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{
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HSSFFont font = workbook.createFont();
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font.setColor(HSSFFont.COLOR_RED);
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cellStyle.setFont(font);
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cellStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
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sheet.setColumnWidth(i, 6000);
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}
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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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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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}
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cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
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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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// 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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{
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setHSSFPrompt(sheet, "", attr.prompt(), 1, 100, col, col); // 这里默认设了2-101列提示.
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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, col, col); // 这里默认设了2-101列只能选择不能输入.
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}
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}
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int startNo = index * sheetSize;
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int endNo = Math.min(startNo + sheetSize, list.size());
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// 写入各条记录,每条记录对应excel表中的一行
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HSSFCellStyle cs = workbook.createCellStyle();
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cs.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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cs.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
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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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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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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(getExcelCol(attr.column()));// 创建cell
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cell.setCellStyle(cs);
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try
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{
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if (String.valueOf(field.get(vo)).length() > 10)
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throw new Exception("长度超过10位就不用转数字了");
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// 如果可以转成数字则导出为数字类型
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BigDecimal bc = new BigDecimal(String.valueOf(field.get(vo)));
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cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
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cell.setCellValue(bc.doubleValue());
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}
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catch (Exception e)
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{
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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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}
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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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}
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}
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}
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}
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catch (Exception e)
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{
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log.error("导出Excel失败{}", e);
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}
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}
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}
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}
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try
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{
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String filename = encodingFilename(sheetName);
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OutputStream out = new FileOutputStream(getfile() + filename);
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workbook.write(out);
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out.close();
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return AjaxResult.success(filename);
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}
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catch (Exception e)
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{
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log.error("关闭flush失败{}", e);
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return AjaxResult.error("导出Excel失败，请联系网站管理员！");
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}
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}
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/**
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* 将EXCEL中A,B,C,D,E列映射成0,1,2,3
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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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/**
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* 设置单元格上提示
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*
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* @param sheet 要设置的sheet.
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* @param promptTitle 标题
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* @param promptContent 内容
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* @param firstRow 开始行
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* @param endRow 结束行
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* @param firstCol 开始列
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* @param endCol 结束列
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* @return 设置好的sheet.
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*/
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public static HSSFSheet setHSSFPrompt(HSSFSheet sheet, String promptTitle, String promptContent, int firstRow,
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int endRow, int firstCol, int endCol)
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{
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// 构造constraint对象
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DVConstraint constraint = DVConstraint.createCustomFormulaConstraint("DD1");
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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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return sheet;
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}
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/**
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* 设置某些列的值只能输入预制的数据,显示下拉框.
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*
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* @param sheet 要设置的sheet.
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* @param textlist 下拉框显示的内容
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* @param firstRow 开始行
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* @param endRow 结束行
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* @param firstCol 开始列
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* @param endCol 结束列
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* @return 设置好的sheet.
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*/
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public static HSSFSheet setHSSFValidation(HSSFSheet sheet, String[] textlist, int firstRow, int endRow,
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int firstCol, int endCol)
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{
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// 加载下拉列表内容
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DVConstraint constraint = DVConstraint.createExplicitListConstraint(textlist);
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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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return sheet;
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}
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/**
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* 编码文件名
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*/
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public String encodingFilename(String filename)
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{
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filename = UUID.randomUUID().toString() + "_" + filename + ".xls";
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return filename;
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}
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public String getfile() throws FileNotFoundException
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{
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return ResourceUtils.getURL("classpath:").getPath() + "static/file/";
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}
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} |