java操作excel 工具类

java操作excel

　　可参考https://blog.csdn.net/xunwei0303/article/details/53213130

直接上代码：

一、java生成excel文件：

package com.excel;

public class Man {  
    private String name;  
    private int sex;  
    private String idCard;  
    private float salary;  
    public Man(String name, int sex, String idCard, float salary) {  
        super();  
        this.name = name;  
        this.sex = sex;  
        this.idCard = idCard;  
        this.salary = salary;  
    }  
      
    public Man() {  
        super();  
    }  
  
    public String getName() {  
        return name;  
    }  
    public void setName(String name) {  
        this.name = name;  
    }  
    public int getSex() {  
        return sex;  
    }  
    public void setSex(int sex) {  
        this.sex = sex;  
    }  
    public String getIdCard() {  
        return idCard;  
    }  
    public void setIdCard(String idCard) {  
        this.idCard = idCard;  
    }  
    public float getSalary() {  
        return salary;  
    }  
    public void setSalary(float salary) {  
        this.salary = salary;  
    }  
      
  
}  

package com.excel;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.text.DecimalFormat;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;  
  
public class ExcelExportUtil {  
    HttpServletResponse response;  
    // 文件名  
    private String fileName ;  
    //文件保存路径  
    private String fileDir;  
    //sheet名  
    private String sheetName;  
    //表头字体  
    private String titleFontType = "Arial Unicode MS";  
    //表头背景色  
    private String titleBackColor = "C1FBEE";  
    //表头字号  
    private short titleFontSize = 12;  
    //添加自动筛选的列 如 A:M  
    private String address = "";  
    //正文字体  
    private String contentFontType = "Arial Unicode MS";  
    //正文字号  
    private short contentFontSize = 12;  
    //Float类型数据小数位  
    private String floatDecimal = ".00";  
    //Double类型数据小数位  
    private String doubleDecimal = ".00";  
    //设置列的公式  
    private String colFormula[] = null;  
      
    DecimalFormat floatDecimalFormat=new DecimalFormat(floatDecimal);  
    DecimalFormat doubleDecimalFormat=new DecimalFormat(doubleDecimal);  
      
    private HSSFWorkbook workbook = null;  
      
    public ExcelExportUtil(String fileDir,String sheetName){  
         this.fileDir = fileDir;  
         this.sheetName = sheetName;  
         workbook = new HSSFWorkbook();  
    }  
      
    public ExcelExportUtil(HttpServletResponse response,String fileName,String sheetName){  
         this.response = response;  
         this.sheetName = sheetName;  
         workbook = new HSSFWorkbook();  
    }  
    /** 
     * 设置表头字体. 
     * @param titleFontType 
     */  
    public void setTitleFontType(String titleFontType) {  
        this.titleFontType = titleFontType;  
    }  
    /** 
     * 设置表头背景色. 
     * @param titleBackColor 十六进制 
     */  
    public void setTitleBackColor(String titleBackColor) {  
        this.titleBackColor = titleBackColor;  
    }  
    /** 
     * 设置表头字体大小. 
     * @param titleFontSize 
     */  
    public void setTitleFontSize(short titleFontSize) {  
        this.titleFontSize = titleFontSize;  
    }  
    /** 
     * 设置表头自动筛选栏位,如A:AC. 
     * @param address 
     */  
    public void setAddress(String address) {  
        this.address = address;  
    }  
    /** 
     * 设置正文字体. 
     * @param contentFontType 
     */  
    public void setContentFontType(String contentFontType) {  
        this.contentFontType = contentFontType;  
    }  
    /** 
     * 设置正文字号. 
     * @param contentFontSize 
     */  
    public void setContentFontSize(short contentFontSize) {  
        this.contentFontSize = contentFontSize;  
    }  
    /** 
     * 设置float类型数据小数位 默认.00 
     * @param doubleDecimal 如 ".00" 
     */  
    public void setDoubleDecimal(String doubleDecimal) {  
        this.doubleDecimal = doubleDecimal;  
    }  
    /** 
     * 设置doubel类型数据小数位 默认.00 
     * @param floatDecimalFormat 如 ".00 
     */  
    public void setFloatDecimalFormat(DecimalFormat floatDecimalFormat) {  
        this.floatDecimalFormat = floatDecimalFormat;  
    }  
    /** 
     * 设置列的公式  
     * @param colFormula  存储i-1列的公式 涉及到的行号使用@替换 如A@+B@ 
     */  
    public void setColFormula(String[] colFormula) {  
        this.colFormula = colFormula;  
    }  
    /** 
     * 写excel. 
     * @param titleColumn  对应bean的属性名 
     * @param titleName   excel要导出的表名 
     * @param titleSize   列宽 
     * @param dataList  数据 
     * @param sheetName excel 页名
     */  
    public void wirteExcel(String titleColumn[],String titleName[],int titleSize[],List<?> dataList, String sheetName){  
        //添加Worksheet（不添加sheet时生成的xls文件打开时会报错)  
        Sheet sheet = workbook.createSheet(this.sheetName);    
        //新建文件  
        OutputStream out = null;  
        try {      
            if(fileDir!=null){  
                //有文件路径  
                out = new FileOutputStream(fileDir);                  
            }else{  
                //否则，直接写到输出流中  
                out = response.getOutputStream();  
                fileName = fileName+".xls";  
                response.setContentType("application/x-msdownload");  
                response.setHeader("Content-Disposition", "attachment; filename="  
                        + URLEncoder.encode(fileName, "UTF-8"));  
            }  
              
            //写入excel的表头  
            Row titleNameRow = workbook.getSheet(sheetName).createRow(0);   
            //设置样式  
            HSSFCellStyle titleStyle = workbook.createCellStyle();    
            titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, titleFontType, (short) titleFontSize);  
            titleStyle = (HSSFCellStyle) setColor(titleStyle, titleBackColor, (short)10);  
              
            for(int i = 0;i < titleName.length;i++){  
                sheet.setColumnWidth(i, titleSize[i]*256);    //设置宽度          
                Cell cell = titleNameRow.createCell(i);  
                cell.setCellStyle(titleStyle);  
                cell.setCellValue(titleName[i].toString());  
            }  
              
            //为表头添加自动筛选  
            if(!"".equals(address)){  
                CellRangeAddress c = (CellRangeAddress) CellRangeAddress.valueOf(address);  
                sheet.setAutoFilter(c);  
            }  
              
            //通过反射获取数据并写入到excel中  
            if(dataList!=null&&dataList.size()>0){  
                //设置样式  
                HSSFCellStyle dataStyle = workbook.createCellStyle();    
                titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, contentFontType, (short) contentFontSize);  
                  
                if(titleColumn.length>0){  
                    for(int rowIndex = 1;rowIndex<=dataList.size();rowIndex++){  
                        Object obj = dataList.get(rowIndex-1);     //获得该对象  
                        Class clsss = obj.getClass();     //获得该对对象的class实例  
                        Row dataRow = workbook.getSheet(sheetName).createRow(rowIndex);      
                        for(int columnIndex = 0;columnIndex<titleColumn.length;columnIndex++){  
                            String title = titleColumn[columnIndex].toString().trim();  
                            if(!"".equals(title)){  //字段不为空  
                                //使首字母大写  
                                String UTitle = Character.toUpperCase(title.charAt(0))+ title.substring(1, title.length()); // 使其首字母大写;  
                                String methodName  = "get"+UTitle;  
                                  
                                // 设置要执行的方法  
                                Method method = clsss.getDeclaredMethod(methodName);   
                                  
                                //获取返回类型  
                                String returnType = method.getReturnType().getName();   
                                  
                                String data = method.invoke(obj)==null?"":method.invoke(obj).toString();  
                                Cell cell = dataRow.createCell(columnIndex);  
                                if(data!=null&&!"".equals(data)){  
                                    if("int".equals(returnType)){  
                                        cell.setCellValue(Integer.parseInt(data));  
                                    }else if("long".equals(returnType)){  
                                        cell.setCellValue(Long.parseLong(data));  
                                    }else if("float".equals(returnType)){  
                                        cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));  
                                    }else if("double".equals(returnType)){  
                                        cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));  
                                    }else{  
                                        cell.setCellValue(data);  
                                    }  
                                }  
                            }else{   //字段为空 检查该列是否是公式  
                                if(colFormula!=null){  
                                    String sixBuf = colFormula[columnIndex].replace("@", (rowIndex+1)+"");  
                                    Cell cell = dataRow.createCell(columnIndex);  
                                    cell.setCellFormula(sixBuf.toString());  
                                }  
                            }  
                        }  
                    }  
                      
                }  
            }  
              
            workbook.write(out);  
        } catch (Exception e) {  
            e.printStackTrace();  
        } finally {    
            try {  
                out.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }    
    }  
      
    /** 
     * 将16进制的颜色代码写入样式中来设置颜色 
     * @param style  保证style统一 
     * @param color 颜色：66FFDD 
     * @param index 索引 8-64 使用时不可重复 
     * @return 
     */  
    public CellStyle setColor(CellStyle style,String color,short index){  
        if(color!=""&&color!=null){  
            //转为RGB码  
            int r = Integer.parseInt((color.substring(0,2)),16);   //转为16进制  
            int g = Integer.parseInt((color.substring(2,4)),16);  
            int b = Integer.parseInt((color.substring(4,6)),16);  
            //自定义cell颜色  
            HSSFPalette palette = workbook.getCustomPalette();   
            palette.setColorAtIndex((short)index, (byte) r, (byte) g, (byte) b);  
          
            //style.setFillPattern(CellStyle.SOLID_FOREGROUND);   
            style.setFillForegroundColor(index);  
        }  
        return style;     
    }  
     
    /** 
     * 设置字体并加外边框 
     * @param style  样式 
     * @param style  字体名 
     * @param style  大小 
     * @return 
     */  
    public CellStyle setFontAndBorder(CellStyle style,String fontName,short size){  
        HSSFFont font = workbook.createFont();    
        font.setFontHeightInPoints(size);      
        font.setFontName(fontName);   
        font.setBold(true);  
        style.setFont(font);  
        //style.setBorderBottom(CellStyle.BORDER_THIN); //下边框      
        //style.setBorderLeft(CellStyle.BORDER_THIN);//左边框      
        //style.setBorderTop(CellStyle.BORDER_THIN);//上边框      
        //style.setBorderRight(CellStyle.BORDER_THIN);//右边框     
        return style;  
    }  
    /** 
     * 删除文件 
     * @param fileDir 
     * @return 
     */  
    public boolean deleteExcel(){  
        boolean flag = false;  
        File file = new File(this.fileDir);  
        // 判断目录或文件是否存在    
        if (!file.exists()) {  // 不存在返回 false    
            return flag;    
        } else {    
            // 判断是否为文件    
            if (file.isFile()) {  // 为文件时调用删除文件方法    
                file.delete();  
                flag = true;  
            }   
        }  
        return flag;  
    }  
    /** 
     * 删除文件 
     * @param fileDir 
     * @return 
     */  
    public boolean deleteExcel(String path){  
        boolean flag = false;  
        File file = new File(path);  
        // 判断目录或文件是否存在    
        if (!file.exists()) {  // 不存在返回 false    
            return flag;    
        } else {    
            // 判断是否为文件    
            if (file.isFile()) {  // 为文件时调用删除文件方法    
                file.delete();  
                flag = true;  
            }   
        }  
        return flag;  
    }  
}  

package com.excel;

import java.util.ArrayList;
import java.util.List;
  
public class ExcelTest {  
  
    public static void main(String[] args) {  
        //1.获取数据[数据库] 
        List<Man> dataList = new ArrayList();  
        Man man1 = new Man("张三",20,"男",(float)10000.8);  
        Man man2 = new Man("李四",21,"男",(float)11000.8);  
        Man man3 = new Man("王五",22,"女",(float)1200.8);  
        Man man4 = new Man("赵六",23,"男",(float)13000.8);  
        Man man5 = new Man("田七",24,"男",(float)14000.8);  
        Man man6 = new Man();  
        man6.setName("老八");  
        dataList.add(man1);dataList.add(man2);dataList.add(man3);dataList.add(man4);dataList.add(man5);  
        dataList.add(man6);  
        //2.分页,每页显示2行
        int pageSize = 2;// 定义每页数据数量
        int listCount = dataList.size();
        //总数量除以每页显示条数等于页数
        int exportTimes = listCount % pageSize > 0 ? listCount / pageSize + 1 : listCount / pageSize;
        
        //3.通用的设置(标题、公式等)  
        String titleColumn[] = {"name","sex","idCard","salary",""};  
        String titleName[] = {"姓名","性别","身份证号","月薪","年薪"};  
        int titleSize[] = {13,13,13,13,13};  
        //其他设置 set方法可全不调用  
        String colFormula[] = new String[5];  
        colFormula[4] = "D@*12";   //设置第5列的公式  
        //工具对象
        ExcelExportUtil pee = new ExcelExportUtil("E:/test.xls","sheet");  
        
        //4.循环获取产生每页数据
        for (int i = 0; i < exportTimes; i++) {
            
            pee.setColFormula(colFormula);  
            pee.setAddress("A:D");  //自动筛选   
            
            List<Man> subList = dataList.subList(i*pageSize, ((i+1)*pageSize));
            pee.wirteExcel(titleColumn, titleName, titleSize, subList, "sheet" + (i + 1));  
        }
        
        System.out.println("excel生成完毕！");
        
    }  
  
}  

二、java读取excel文件：

package com.excel;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
/**
 * Excel数据封装对象
 * @author kongzhimin
 *
 */
public class ExcelEntity {
    /**
     * EXCEL表头字段
     */
    private String[] heard;
    /**
     * EXCEL内容封装
     */
    private JSONArray context;
    public String[] getHeard() {
        return heard;
    }
    public void setHeard(String[] heard) {
        this.heard = heard;
    }
    public JSONArray getContext() {
        return context;
    }
    public void setContext(JSONArray context) {
        this.context = context;
    }
    @Override
    public String toString() {
        return JSON.toJSONString(this);
    }
}

package com.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import com.alibaba.fastjson.JSONArray;

import net.sf.json.JSONObject;

/**
 * excel工具类
 * @author weijiaquan
 *
 */
public class ExcelUtil {
    
    private static final Logger log = Logger.getLogger(ExcelUtil.class);
    
    
    /**
     * EXCEL读取的数据表对象
     */
    private static Sheet sheet;
    /**
     * 行数
     */
    private static Integer rowNum;
    /**
     * 列数
     */
    private static Integer colNum;
    /**
     * 数据表表头位置
     */
    private static Integer headNum;
    /**
     * 数据表表头字段与bean字段映射
     */
    private Map<String,String> headMap;
    /**
     * excel 内容
     */
    private static JSONArray excelContent = new JSONArray();
    /**
     * excel 标题
     */
    private static String[] excelTitle = new String[0];
    /**
     * 表头字段列表
     */
    private static String[] heads = {"dateTime","hours","publicNum","mediaName","mediaSource","sums","dNum","iNum"};
    
    /**
     * workbook
     */
    private static Workbook workbook;
    
    /**
     * 解析excel
     * @param file 
     * @return
     * @throws IOException
     */
    public static void readerExcel(File file) throws IOException {
        // 1.检查文件
        checkFile(file);
        // 2.获得Workbook工作薄对象
        workbook = getWorkBook(file);
        if (workbook != null) {
            System.out.println("excel总页数sheetNum= "+ workbook.getNumberOfSheets());
            for (int sheetNum = 0; sheetNum < workbook.getNumberOfSheets(); sheetNum++) {
                // 3.初始化init
                System.out.println("第" + sheetNum + "页");
                init(sheetNum);
                
                // 4.读取Excel
                // 4.1 获取title[不用分页读取]--title理应一样
                
                // 4.2获取内容[取所有页的内容]
                JSONArray currentContent = readExcelContent();
                System.out.println("currentContent" + sheetNum + "--" + currentContent.size());
                for (Object object : currentContent) {
                    excelContent.add(object);
                }
                if (sheet == null) {
                    continue;
                }
            }
        }
    }
    
    /**
     * 获取每个单元格的值
     * @param cell
     * @return
     */
    public static String getCellValue(Cell cell) {
        String cellValue = "";
        if (cell == null) {
            return cellValue;
        }
        // 判断数据的类型
        switch (cell.getCellType()) {
        case Cell.CELL_TYPE_NUMERIC: // 数字
            cellValue = stringDateProcess(cell);
            break;
        case Cell.CELL_TYPE_STRING: // 字符串
            cellValue = String.valueOf(cell.getStringCellValue());
            break;
        case Cell.CELL_TYPE_BOOLEAN: // Boolean
            cellValue = String.valueOf(cell.getBooleanCellValue());
            break;
        case Cell.CELL_TYPE_FORMULA: // 公式
            cellValue = String.valueOf(cell.getCellFormula());
            break;
        case Cell.CELL_TYPE_BLANK: // 空值
            cellValue = "";
            break;
        case Cell.CELL_TYPE_ERROR: // 故障
            cellValue = "非法字符";
            break;
        default:
            cellValue = "未知类型";
            break;
        }
        return cellValue;
    }

    /**
      * 时间格式处理
      * @return
      * @author weijiaquan
      */
     public static String stringDateProcess(Cell cell){
         String result = new String();  
         if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式  
             SimpleDateFormat sdf = null;  
             if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {  
                 sdf = new SimpleDateFormat("HH:mm");  
             } else {// 日期  
                 sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
             }  
             Date date = cell.getDateCellValue();  
             result = sdf.format(date);  
         } else if (cell.getCellStyle().getDataFormat() == 58) {  
             // 处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是58)  
             SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");  
             double value = cell.getNumericCellValue();  
             Date date = org.apache.poi.ss.usermodel.DateUtil  
                     .getJavaDate(value);  
             result = sdf.format(date);  
         } else {  
             double value = cell.getNumericCellValue();  
             CellStyle style = cell.getCellStyle();  
             DecimalFormat format = new DecimalFormat("#,#######");  
             String temp = style.getDataFormatString();  
             // 单元格设置成常规  
             if (temp.equals("General")) {  
                 format.applyPattern("#");  
             }  
             result = format.format(value);  
         }  
         
         return result;
     }
     
     
     /**
      * 检查文件
      * @param file
      * @throws IOException
      */
      public static  void checkFile(File file) throws IOException{
          //判断文件是否存在
          if(null == file){
              log.error("文件不存在！");
          }
          //获得文件名
          String fileName = file.getName();
          //判断文件是否是excel文件
          if(!fileName.endsWith("xls") && !fileName.endsWith("xlsx")){
              log.error(fileName + "不是excel文件");
          }
      }
      /**
       * 获得Workbook工作薄对象
       * @param file
       * @return
       */
      public static  Workbook getWorkBook(File file) {
          //获得文件名
          String fileName = file.getName();
          //创建Workbook工作薄对象，表示整个excel
          Workbook workbook = null;
          try {
              //获取excel文件的io流
              InputStream is = new FileInputStream(file);
              //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
              if(fileName.endsWith("xls")){
                  //2003
                  workbook = new HSSFWorkbook(is);
              }else if(fileName.endsWith("xlsx")){
                  //2007 及2007以上
                  workbook = new XSSFWorkbook(is);
              }
          } catch (IOException e) {
              log.error(e.getMessage());
          }
          return workbook;
      }
      
      /**
       * 读取Excel表格表头的内容
       * @param InputStream
       * @return String 表头内容的数组
       */
      private static String[] readExcelTitle() {
          Row row = sheet.getRow(headNum);
          System.out.println("colNum:" + colNum);
          String[] title = new String[colNum];
          for (int i = 0; i < colNum; i++) {
              title[i] = getCellValue(row.getCell(i));
          }
          return title;
      }
      /**
       * reader初始化方法
       * @throws IOException
       */
      private static void init(Integer sheetNum) throws IOException {
          sheet = workbook.getSheetAt(sheetNum);
          rowNum = sheet.getLastRowNum();
          headNum = 0;
          colNum = sheet.getRow(0).getPhysicalNumberOfCells();
          heads = readExcelTitle();
      }
      
      /**
     * 解析EXCEL文件成为Entity对象
     * @return ExcelEntity Excel解析实体对象
       * @throws IOException 
     */
    public static ExcelEntity parseExcelToEntity(File file) throws IOException {
        //1.解析excel
        readerExcel(file);
        //2.封装对象
        ExcelEntity entity = new ExcelEntity();
        entity.setHeard(readExcelTitle());
        entity.setContext(excelContent);
        return entity;
    }
      
    /**
     * 读取Excel数据内容
     * @param InputStream
     * @return JSONArray 包含单元格数据内容的对象
     */
    private static JSONArray readExcelContent() {
        JSONArray array = new JSONArray();
        for (int i = headNum+1; i <= rowNum; i++) {
            array.add(parseRowToObject(i));
        }
        return array;
    }
    
    /**
     * 数据表行转化JSONObject
     * @param rowNum
     * @return
     */
    private static JSONObject parseRowToObject(Integer rowNum) {
        JSONObject object = new JSONObject();
        Row row = sheet.getRow(rowNum);
        for (int i = 0; i < colNum; i++) {
            object.put(heads[i], getCellValue(row.getCell(i)));
        }
        return object;
    }

    public static void main(String[] args) throws IOException {
        File file = new File("C:\Users\weijiaquan\excel\201807091922.xls");
        
        ExcelEntity excelEntity = parseExcelToEntity(file);
        JSONArray context = excelEntity.getContext();
        for (int i = 0; i < context.size(); i++) {
            com.alibaba.fastjson.JSONObject jsonObject = context.getJSONObject(i);
            String sql = "INSERT INTO T(groupId,lenderId,lenderUrlId,nPriority,nStatus,createBy,createdDate,updateBy,updatedDate) VALUES (17101,%s,%s,%s,0,'system',now(),'system',now());";
            String format = String.format(sql, jsonObject.get("lenderid"), jsonObject.get("urlid"), jsonObject.get("order"));
            System.out.println(format);
            //System.out.println(jsonObject);
        }
    }
}