751 lines
25 KiB
Java
751 lines
25 KiB
Java
package com.ruoyi.common.utils;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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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.lang.reflect.Method;
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import java.text.DecimalFormat;
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import java.util.ArrayList;
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import java.util.Date;
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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.HSSFDataValidation;
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import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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import org.apache.poi.hssf.usermodel.HSSFFont;
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import org.apache.poi.hssf.util.HSSFColor.HSSFColorPredefined;
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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.CellType;
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import org.apache.poi.ss.usermodel.DateUtil;
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import org.apache.poi.ss.usermodel.FillPatternType;
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import org.apache.poi.ss.usermodel.Font;
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import org.apache.poi.ss.usermodel.HorizontalAlignment;
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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.VerticalAlignment;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.poi.ss.util.CellRangeAddressList;
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import org.apache.poi.xssf.streaming.SXSSFWorkbook;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.ruoyi.common.annotation.Excel;
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import com.ruoyi.common.annotation.Excel.Type;
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import com.ruoyi.common.base.AjaxResult;
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import com.ruoyi.common.config.Global;
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import com.ruoyi.common.exception.BusinessException;
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import com.ruoyi.common.reflect.ReflectUtils;
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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(ExcelUtil.class);
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/**
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* Excel sheet最大行数，默认65536
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*/
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public static final int sheetSize = 65536;
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/**
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* 工作表名称
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*/
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private String sheetName;
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/**
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* 导出类型（EXPORT:导出数据；IMPORT：导入模板）
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*/
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private Type type;
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/**
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* 工作薄对象
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*/
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private Workbook wb;
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/**
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* 工作表对象
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*/
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private Sheet sheet;
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/**
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* 导入导出数据列表
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*/
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private List<T> list;
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/**
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* 注解列表
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*/
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private List<Field> fields;
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/**
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* 实体对象
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*/
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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 void init(List<T> list, String sheetName, Type type)
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{
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if (list == null)
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{
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list = new ArrayList<T>();
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}
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this.list = list;
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this.sheetName = sheetName;
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this.type = type;
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createExcelField();
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createWorkbook();
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}
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/**
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* 对excel表单默认第一个索引名转换成list
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*
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* @param input 输入流
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* @return 转换后集合
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*/
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public List<T> importExcel(InputStream is) throws Exception
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{
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return importExcel(StringUtils.EMPTY, is);
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}
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/**
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* 对excel表单指定表格索引名转换成list
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*
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* @param sheetName 表格索引名
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* @param input 输入流
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* @return 转换后集合
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*/
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public List<T> importExcel(String sheetName, InputStream is) throws Exception
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{
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this.wb = new XSSFWorkbook(is);
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List<T> list = new ArrayList<T>();
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Sheet sheet = null;
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if (StringUtils.isNotEmpty(sheetName))
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{
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// 如果指定sheet名,则取指定sheet中的内容.
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sheet = wb.getSheet(sheetName);
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}
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else
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{
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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 = wb.getSheetAt(0);
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}
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if (sheet == null)
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{
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throw new IOException("文件sheet不存在");
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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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// 默认序号
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int serialNum = 0;
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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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// 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(++serialNum, 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 = serialNum;
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T entity = null;
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for (int column = 0; column < cellNum; column++)
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{
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Object val = this.getCellValue(row, column);
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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(column + 1);
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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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String s = String.valueOf(val.toString());
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if (StringUtils.endsWith(s, ".0"))
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{
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val = StringUtils.substringBefore(s, ".0");
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}
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else
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{
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val = String.valueOf(val.toString());
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}
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}
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else if ((Integer.TYPE == fieldType) || (Integer.class == fieldType))
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{
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val = Double.valueOf(val.toString()).intValue();
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}
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else if ((Long.TYPE == fieldType) || (Long.class == fieldType))
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{
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val = Double.valueOf(val.toString()).longValue();
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}
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else if ((Double.TYPE == fieldType) || (Double.class == fieldType))
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{
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val = Double.valueOf(val.toString());
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}
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else if ((Float.TYPE == fieldType) || (Float.class == fieldType))
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{
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val = Float.valueOf(val.toString());
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}
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else if (Date.class == fieldType)
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{
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if (val instanceof String)
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{
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val = DateUtils.parseDate(val);
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}
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else if (val instanceof Double)
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{
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val = DateUtil.getJavaDate((Double) val);
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}
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}
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if (StringUtils.isNotNull(fieldType))
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{
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Excel attr = field.getAnnotation(Excel.class);
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if (StringUtils.isNotEmpty(attr.targetAttr()))
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{
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ReflectUtils.invokeSetter(entity, field.getName() + "." + attr.targetAttr(), val);
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}
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else if (StringUtils.isNotEmpty(attr.readConverterExp()))
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{
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String value = reverseByExp(String.valueOf(val), attr.readConverterExp());
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ReflectUtils.invokeSetter(entity, field.getName() + "." + attr.targetAttr(), value);
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}
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else
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{
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ReflectUtils.invokeSetter(entity, field.getName(), val);
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}
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}
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}
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list.add(entity);
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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 list 导出数据集合
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* @param sheetName 工作表的名称
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* @return 结果
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*/
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public AjaxResult exportExcel(List<T> list, String sheetName)
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{
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this.init(list, sheetName, Type.EXPORT);
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return exportExcel();
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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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* @return 结果
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*/
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public AjaxResult importTemplateExcel(String sheetName)
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{
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this.init(null, sheetName, Type.IMPORT);
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return exportExcel();
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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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* @return 结果
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*/
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public AjaxResult exportExcel()
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{
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OutputStream out = null;
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try
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{
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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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createSheet(sheetNo, index);
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Cell cell = null; // 产生单元格
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// 产生一行
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Row 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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// 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(CellType.STRING);
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CellStyle cellStyle = wb.createCellStyle();
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cellStyle.setAlignment(HorizontalAlignment.CENTER);
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cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
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if (attr.name().indexOf("注：") >= 0)
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{
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Font font = wb.createFont();
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font.setColor(HSSFFont.COLOR_RED);
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cellStyle.setFont(font);
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cellStyle.setFillForegroundColor(HSSFColorPredefined.YELLOW.getIndex());
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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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Font font = wb.createFont();
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// 粗体显示
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font.setBold(true);
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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(HSSFColorPredefined.LIGHT_YELLOW.getIndex());
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// 设置列宽
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sheet.setColumnWidth(i, (int) ((attr.width() + 0.72) * 256));
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row.setHeight((short) (attr.height() * 20));
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}
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cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
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cellStyle.setWrapText(true);
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cell.setCellStyle(cellStyle);
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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 (StringUtils.isNotEmpty(attr.prompt()))
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{
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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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// 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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if (Type.EXPORT.equals(type))
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{
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fillExcelData(index, row, cell);
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}
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}
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String filename = encodingFilename(sheetName);
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out = new FileOutputStream(getAbsoluteFile(filename));
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wb.write(out);
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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("导出Excel异常{}", e.getMessage());
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throw new BusinessException("导出Excel失败，请联系网站管理员！");
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}
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finally
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{
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if (wb != null)
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{
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try
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{
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wb.close();
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}
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catch (IOException e1)
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{
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e1.printStackTrace();
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}
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}
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if (out != null)
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{
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try
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{
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out.close();
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}
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catch (IOException e1)
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{
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e1.printStackTrace();
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}
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}
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}
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}
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/**
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* 填充excel数据
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*
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* @param index 序号
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* @param row 单元格行
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* @param cell 类型单元格
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*/
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public void fillExcelData(int index, Row row, Cell cell)
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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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CellStyle cs = wb.createCellStyle();
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cs.setAlignment(HorizontalAlignment.CENTER);
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cs.setVerticalAlignment(VerticalAlignment.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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// 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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// 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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// 设置行高
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row.setHeight((short) (attr.height() * 20));
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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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// 创建cell
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cell = row.createCell(j);
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cell.setCellStyle(cs);
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if (vo == null)
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{
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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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continue;
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}
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// 用于读取对象中的属性
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Object value = getTargetValue(vo, field, attr);
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String dateFormat = attr.dateFormat();
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String readConverterExp = attr.readConverterExp();
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if (StringUtils.isNotEmpty(dateFormat))
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{
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cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
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}
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else if (StringUtils.isNotEmpty(readConverterExp))
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{
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cell.setCellValue(convertByExp(String.valueOf(value), readConverterExp));
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}
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else
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{
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cell.setCellType(CellType.STRING);
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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(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
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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.getMessage());
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}
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}
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}
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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 Sheet setHSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow,
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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 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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/**
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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 Sheet setHSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol,
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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 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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/**
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* 解析导出值 0=男,1=女,2=未知
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*
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||
* @param propertyValue 参数值
|
||
* @param converterExp 翻译注解
|
||
* @return 解析后值
|
||
* @throws Exception
|
||
*/
|
||
public static String convertByExp(String propertyValue, String converterExp) throws Exception
|
||
{
|
||
try
|
||
{
|
||
String[] convertSource = converterExp.split(",");
|
||
for (String item : convertSource)
|
||
{
|
||
String[] itemArray = item.split("=");
|
||
if (itemArray[0].equals(propertyValue))
|
||
{
|
||
return itemArray[1];
|
||
}
|
||
}
|
||
}
|
||
catch (Exception e)
|
||
{
|
||
throw e;
|
||
}
|
||
return propertyValue;
|
||
}
|
||
|
||
/**
|
||
* 反向解析值 男=0,女=1,未知=2
|
||
*
|
||
* @param propertyValue 参数值
|
||
* @param converterExp 翻译注解
|
||
* @return 解析后值
|
||
* @throws Exception
|
||
*/
|
||
public static String reverseByExp(String propertyValue, String converterExp) throws Exception
|
||
{
|
||
try
|
||
{
|
||
String[] convertSource = converterExp.split(",");
|
||
for (String item : convertSource)
|
||
{
|
||
String[] itemArray = item.split("=");
|
||
if (itemArray[1].equals(propertyValue))
|
||
{
|
||
return itemArray[0];
|
||
}
|
||
}
|
||
}
|
||
catch (Exception e)
|
||
{
|
||
throw e;
|
||
}
|
||
return propertyValue;
|
||
}
|
||
|
||
/**
|
||
* 编码文件名
|
||
*/
|
||
public String encodingFilename(String filename)
|
||
{
|
||
filename = UUID.randomUUID().toString() + "_" + filename + ".xlsx";
|
||
return filename;
|
||
}
|
||
|
||
/**
|
||
* 获取下载路径
|
||
*
|
||
* @param filename 文件名称
|
||
*/
|
||
public String getAbsoluteFile(String filename)
|
||
{
|
||
String downloadPath = Global.getDownloadPath() + filename;
|
||
File desc = new File(downloadPath);
|
||
if (!desc.getParentFile().exists())
|
||
{
|
||
desc.getParentFile().mkdirs();
|
||
}
|
||
return downloadPath;
|
||
}
|
||
|
||
/**
|
||
* 获取bean中的属性值
|
||
*
|
||
* @param vo 实体对象
|
||
* @param field 字段
|
||
* @param excel 注解
|
||
* @return 最终的属性值
|
||
* @throws Exception
|
||
*/
|
||
private Object getTargetValue(T vo, Field field, Excel excel) throws Exception
|
||
{
|
||
Object o = field.get(vo);
|
||
if (StringUtils.isNotEmpty(excel.targetAttr()))
|
||
{
|
||
String target = excel.targetAttr();
|
||
if (target.indexOf(".") > -1)
|
||
{
|
||
String[] targets = target.split("[.]");
|
||
for (String name : targets)
|
||
{
|
||
o = getValue(o, name);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
o = getValue(o, target);
|
||
}
|
||
}
|
||
return o;
|
||
}
|
||
|
||
/**
|
||
* 以类的属性的get方法方法形式获取值
|
||
*
|
||
* @param o
|
||
* @param name
|
||
* @return value
|
||
* @throws Exception
|
||
*/
|
||
private Object getValue(Object o, String name) throws Exception
|
||
{
|
||
if (StringUtils.isNotEmpty(name))
|
||
{
|
||
Class<?> clazz = o.getClass();
|
||
String methodName = "get" + name.substring(0, 1).toUpperCase() + name.substring(1);
|
||
Method method = clazz.getMethod(methodName);
|
||
o = method.invoke(o);
|
||
}
|
||
return o;
|
||
}
|
||
|
||
/**
|
||
* 得到所有定义字段
|
||
*/
|
||
private void createExcelField()
|
||
{
|
||
this.fields = new ArrayList<Field>();
|
||
Field[] allFields = clazz.getDeclaredFields();
|
||
// 得到所有field并存放到一个list中.
|
||
for (Field field : allFields)
|
||
{
|
||
if (field.isAnnotationPresent(Excel.class))
|
||
{
|
||
fields.add(field);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 创建一个工作簿
|
||
*/
|
||
public void createWorkbook()
|
||
{
|
||
this.wb = new SXSSFWorkbook(500);
|
||
}
|
||
|
||
/**
|
||
* 创建工作表
|
||
*
|
||
* @param sheetName，指定Sheet名称
|
||
* @param sheetNo sheet数量
|
||
* @param index 序号
|
||
*/
|
||
public void createSheet(double sheetNo, int index)
|
||
{
|
||
this.sheet = wb.createSheet();
|
||
// 设置工作表的名称.
|
||
if (sheetNo == 0)
|
||
{
|
||
wb.setSheetName(index, sheetName);
|
||
}
|
||
else
|
||
{
|
||
wb.setSheetName(index, sheetName + index);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 获取单元格值
|
||
*
|
||
* @param row 获取的行
|
||
* @param column 获取单元格列号
|
||
* @return 单元格值
|
||
*/
|
||
public Object getCellValue(Row row, int column)
|
||
{
|
||
if (row == null)
|
||
{
|
||
return row;
|
||
}
|
||
Object val = "";
|
||
try
|
||
{
|
||
Cell cell = row.getCell(column);
|
||
if (cell != null)
|
||
{
|
||
if (cell.getCellTypeEnum() == CellType.NUMERIC)
|
||
{
|
||
val = cell.getNumericCellValue();
|
||
if (HSSFDateUtil.isCellDateFormatted(cell))
|
||
{
|
||
val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换
|
||
}
|
||
else
|
||
{
|
||
if ((Double) val % 1 > 0)
|
||
{
|
||
val = new DecimalFormat("0.00").format(val);
|
||
}
|
||
else
|
||
{
|
||
val = new DecimalFormat("0").format(val);
|
||
}
|
||
}
|
||
}
|
||
else if (cell.getCellTypeEnum() == CellType.STRING)
|
||
{
|
||
val = cell.getStringCellValue();
|
||
}
|
||
else if (cell.getCellTypeEnum() == CellType.BOOLEAN)
|
||
{
|
||
val = cell.getBooleanCellValue();
|
||
}
|
||
else if (cell.getCellTypeEnum() == CellType.ERROR)
|
||
{
|
||
val = cell.getErrorCellValue();
|
||
}
|
||
|
||
}
|
||
}
|
||
catch (Exception e)
|
||
{
|
||
return val;
|
||
}
|
||
return val;
|
||
}
|
||
} |