Excel导出工具类

编程语言 2018-08-01 05:10:53 阅读次数: 0

导出EXcel工具类如下：

package com.yyw.utils;

import jxl.Sheet;
import jxl.Workbook;
import jxl.biff.DisplayFormat;
import jxl.format.Alignment;
import jxl.format.VerticalAlignment;
import jxl.write.*;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;


/**
 * Excel处理工具类
 */
public class ExcelUtils {

    private static SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
    /**
     * Excel模板下载
     * @param filePath
     * @param response
     * @param fileName
     * @return
     * @throws Exception
     */
    public static boolean downLoadFile(String filePath,HttpServletResponse response,
            String fileName)throws Exception {
        File file = new File(filePath);

        response.setContentType("application/msexcel;charset=UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=\""
                + new String(fileName.getBytes("GB2312"), "ISO8859-1") + "\"");
        response.setContentLength((int)file.length());

        byte[] buffer = new byte[4096];//缓冲区
        BufferedOutputStream output = null;
        BufferedInputStream input = null;

        try {
             output = new BufferedOutputStream(response.getOutputStream());
             input = new BufferedInputStream(new FileInputStream(file));
             int n = -1;

            //遍历，开始下载
            while ((n = input.read(buffer, 0, 4096)) > -1) {
                output.write(buffer, 0, n);
             }
            output.flush();   
            response.flushBuffer();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
            throw new Exception("Excel模板下载异常："+e.getMessage());
        }finally{
             //关闭流
             if (input != null){
                 input.close();
             }
             if (output != null){
                 output.close();
             }
        }
        return true;
    }

  //控制Excel里面每个sheet单元最多有多少行
    private static int MAX_ROWS = 50000;

    /**
     * 填充Excel各单元格的值
     * @param <T>
     * @param list 数据list
     * @param os 输出流
     * @param colNames 第一行列字段的中文名称
     * @param colParams 各列对应对象的属性
     * @param sheetName sheet的名称
     */
    public static <T> void setExcel(List<T> list,OutputStream os,String[] colNames,String[] colParams,
            String sheetName,Integer col)throws Exception{

        try {
            WritableWorkbook workbook = Workbook.createWorkbook(os);
            //设定一个sheet里面只能放50000条数据
            int num = list.size()/MAX_ROWS + 1;

            for(int i=0;i<num;i++){

                WritableSheet sheet = null;
                if(StringUtil.isEmpty(sheetName)){
                    sheet = workbook.createSheet("sheet"+i, 0);
                }else{
                    sheet = workbook.createSheet(sheetName+i, 0);
                }

                jxl.write.WritableFont wfc = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE
                        );
                jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(
                        wfc,NumberFormats.TEXT);

                wcfFC.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC.setAlignment(Alignment.CENTRE); // 文字水平对齐

                jxl.write.WritableFont wfc1 = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE,
                        jxl.format.Colour.RED);
                jxl.write.WritableCellFormat wcfFC1 = new jxl.write.WritableCellFormat(
                        wfc1,NumberFormats.TEXT);
                wcfFC1.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC1.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //设置单元格值的样式
                jxl.write.WritableCellFormat wcf_cell = new jxl.write.WritableCellFormat(NumberFormats.TEXT);
                wcf_cell.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcf_cell.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //给Excel第一行的列名赋予中文名称
                for(int j=0;j<colNames.length;j++){
                    if(col != null && j < col){
                        jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                                wcfFC1);
                        sheet.addCell(labelCFC);
                    }else{
                        jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                                wcfFC);
                        sheet.addCell(labelCFC);
                    }
                    sheet.setColumnView(j, 25); // 设置列的宽度
                }

                //参数list集合遍历循环的起始值和结束值
                int num_start = i*MAX_ROWS;
                int num_end = (i+1)*MAX_ROWS;
                int rowNum = 0;

                if(num_end > list.size()){
                    num_end = list.size();
                }
                for(int k=num_start;k<num_end;k++){
                    Map obj = ObjectUtil.beanToMap(list.get(k));
                    Label label = null;
                    int colNum = 0;

                    //循环遍历各列对应对象的属性，并取出值，填充单元格
                    for(String temp:colParams){
                        String value = String.valueOf(obj.get(temp));
                        if(StringUtil.isEmpty(value) || "null".equals(value)){
                            label = new jxl.write.Label(colNum++,rowNum+1,"",wcf_cell);
                        }else{
                            label = new jxl.write.Label(colNum++,rowNum+1,value,wcf_cell);
                        }
                        sheet.addCell(label);
                    }

                    rowNum++;
                }

            }

            workbook.write();
            workbook.close();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("填充Excel各单元格异常:"+e.getMessage());
        }

    }
    /**
     * 填充Excel各单元格的值
     * @param <T>
     * @param list 需要导出的数据
     * @param os 输出流
     * @param colNames 第一行列字段的中文名称
     * @param colParams 各列对应对象的属性
     * @param sheetName sheet的名称
     * @param remakeMap 每一列对应的的数字代表什么意思，例如 sex 1，男；2，女；，导出时希望显示汉字而不是显示数字
     */
    public static <T> void setExcelWithExpectNum(List<T> list,OutputStream os,String[] colNames,String[] colParams,
                                    String sheetName,Integer col,Map<String,Map<String,String>> remakeMap)throws Exception{

        try {
            WritableWorkbook workbook = Workbook.createWorkbook(os);
            //设定一个sheet里面只能放50000条数据
            int num = list.size()/MAX_ROWS + 1;

            for(int i=0;i<num;i++){

                WritableSheet sheet = null;
                if(StringUtil.isEmpty(sheetName)){
                    sheet = workbook.createSheet("sheet"+i, 0);
                }else{
                    sheet = workbook.createSheet(sheetName+i, 0);
                }

                jxl.write.WritableFont wfc = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE
                );
                jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(
                        wfc,NumberFormats.TEXT);

                wcfFC.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC.setAlignment(Alignment.CENTRE); // 文字水平对齐

                jxl.write.WritableFont wfc1 = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE,
                        jxl.format.Colour.RED);
                jxl.write.WritableCellFormat wcfFC1 = new jxl.write.WritableCellFormat(
                        wfc1,NumberFormats.TEXT);
                wcfFC1.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC1.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //设置单元格值的样式
                jxl.write.WritableCellFormat wcf_cell = new jxl.write.WritableCellFormat(NumberFormats.TEXT);
                wcf_cell.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcf_cell.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //给Excel第一行的列名赋予中文名称
                for(int j=0;j<colNames.length;j++){
                    if(col != null && j < col){
                        jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                                wcfFC1);
                        sheet.addCell(labelCFC);
                    }else{
                        jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                                wcfFC);
                        sheet.addCell(labelCFC);
                    }
                    sheet.setColumnView(j, 25); // 设置列的宽度
                }

                //参数list集合遍历循环的起始值和结束值
                int num_start = i*MAX_ROWS;
                int num_end = (i+1)*MAX_ROWS;
                int rowNum = 0;

                if(num_end > list.size()){
                    num_end = list.size();
                }
                for(int k=num_start;k<num_end;k++){
                    Map obj = ObjectUtil.beanToMap(list.get(k));
                    Label label = null;
                    int colNum = 0;

                    //循环遍历各列对应对象的属性，并取出值，填充单元格
                    for(String temp:colParams){
                        String value = "";
                        Object tempObj = obj.get(temp);
                        if(tempObj instanceof Date){
                            value = sf.format((Date)tempObj);
                        }else{
                            value = String.valueOf(tempObj);
                        }

                        for (Map.Entry<String,Map<String,String>> entry : remakeMap.entrySet()){
                            if (temp.equals(entry.getKey())){
                                value = entry.getValue().get(value);
                            }
                        }
                        if(StringUtil.isEmpty(value) || "null".equals(value)){
                            label = new jxl.write.Label(colNum++,rowNum+1,"",wcf_cell);
                        }else{
                            label = new jxl.write.Label(colNum++,rowNum+1,value,wcf_cell);
                        }
                        sheet.addCell(label);
                    }

                    rowNum++;
                }

            }

            workbook.write();
            workbook.close();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("填充Excel各单元格异常:"+e.getMessage());
        }

    }
    /**
     * 填充Excel各单元格的值
     * @param <T>
     * @param list
     * @param os
     * @param colNames 第一行列字段的中文名称
     * @param colParams 各列对应对象的属性
     * @param sheetName sheet的名称
     */
    public static <T> void setToExcel(List<T> list,OutputStream os,String[] colNames,String[] colParams,
            String sheetName)throws Exception{

        try {
            WritableWorkbook workbook = Workbook.createWorkbook(os);
            //设定一个sheet里面只能放50000条数据
            int num = list.size()/MAX_ROWS + 1;

            for(int i=0;i<num;i++){

                WritableSheet sheet = null;
                if(StringUtil.isEmpty(sheetName)){
                    sheet = workbook.createSheet("sheet"+i, 0);
                }else{
                    sheet = workbook.createSheet(sheetName+i, 0);
                }

                jxl.write.WritableFont wfc = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE
                        );
                jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(
                        wfc,NumberFormats.TEXT);

                wcfFC.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC.setAlignment(Alignment.CENTRE); // 文字水平对齐

                jxl.write.WritableFont wfc1 = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE,
                        jxl.format.Colour.RED);
                jxl.write.WritableCellFormat wcfFC1 = new jxl.write.WritableCellFormat(
                        wfc1,NumberFormats.TEXT);
                wcfFC1.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC1.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //设置单元格值的样式
                jxl.write.WritableCellFormat wcf_cell = new jxl.write.WritableCellFormat();
                wcf_cell.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcf_cell.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //给Excel第一行的列名赋予中文名称
                for(int j=0;j<colNames.length;j++){
                    jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                            wcfFC);
                    sheet.addCell(labelCFC);
                    sheet.setColumnView(j, 25); // 设置列的宽度
                }

                //参数list集合遍历循环的起始值和结束值
                int num_start = i*MAX_ROWS;
                int num_end = (i+1)*MAX_ROWS;
                int rowNum = 0;

                if(num_end > list.size()){
                    num_end = list.size();
                }
                for(int k=num_start;k<num_end;k++){
                    Map obj = ObjectUtil.beanToMap(list.get(k));
                    Label label = null;
                    int colNum = 0;

                    //循环遍历各列对应对象的属性，并取出值，填充单元格
                    for(String temp:colParams){
                        String value = "";
                        try {
                            //Object tempObj = MethodUtils.invokeMethod(obj, "get"+temp.substring(0,1).toUpperCase()+temp.substring(1, temp.length()), null);
                            Object tempObj = obj.get(temp);
                            if(tempObj instanceof Date){
                                value = sf.format((Date)tempObj);
                            }else{
                                value = String.valueOf(tempObj);
                            }
                        } catch (Exception e) {
                        }finally{
                            if(StringUtil.isEmpty(value) || "null".equals(value)){
                                label = new jxl.write.Label(colNum++,rowNum+1,"",wcf_cell);
                            }else{
                                label = new jxl.write.Label(colNum++,rowNum+1,value,wcf_cell);
                            }
                            sheet.addCell(label);
                        }
                    }

                    rowNum++;
                }

            }

            workbook.write();
            workbook.close();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("填充Excel各单元格异常:"+e.getMessage());
        }

    }

    /**
     * 填充Excel，并对某一列设置其格式样式和宽度
     * @param list
     * @param os
     * @param colNames
     * @param colParams
     * @param sheetName
     * @param colStyle 数组的含义//0:取该列的值对应的属性，1：表示该列的样式，2：第几列，3：该列宽度
     */
    public static <T> void setExcelByCol(List<T> list,OutputStream os,String[] colNames,String[] colParams,
            String sheetName,Object[] colStyle)throws Exception{

        try {
            WritableWorkbook workbook = Workbook.createWorkbook(os);
            //设定一个sheet里面只能放50000条数据
            int num = list.size()/MAX_ROWS + 1;

            for(int i=0;i<num;i++){

                WritableSheet sheet = null;
                if(StringUtil.isEmpty(sheetName)){
                    sheet = workbook.createSheet("sheet"+i, 0);
                }else{
                    sheet = workbook.createSheet(sheetName+i, 0);
                }

                jxl.write.WritableFont wfc = new jxl.write.WritableFont(
                        WritableFont.ARIAL, 10, WritableFont.BOLD, false,
                        jxl.format.UnderlineStyle.NO_UNDERLINE,
                        jxl.format.Colour.RED);
                jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(
                        wfc,NumberFormats.TEXT);
                wcfFC.setBackground(jxl.format.Colour.YELLOW);
                wcfFC.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcfFC.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //设置单元格值的样式
                jxl.write.WritableCellFormat wcf_cell = new jxl.write.WritableCellFormat(NumberFormats.TEXT);
                wcf_cell.setVerticalAlignment(VerticalAlignment.CENTRE); // 文字垂直对齐
                wcf_cell.setAlignment(Alignment.CENTRE); // 文字水平对齐

                //设置某一列宽度
                if(colStyle.length == 4){
                    sheet.setColumnView(Integer.valueOf(colStyle[2].toString()),Integer.valueOf(colStyle[3].toString()));
                }
                //给单独某一列设置样式
                jxl.write.WritableCellFormat wcfCol = new jxl.write.WritableCellFormat((DisplayFormat)colStyle[1]); //定义一个单元格样式  NumberFormats.FORMAT7
                wcfCol.setAlignment(Alignment.CENTRE);
                wcfCol.setVerticalAlignment(VerticalAlignment.CENTRE);

                jxl.write.Number number = null;
                 //CellView cv = new CellView(); //定义一个列显示样式 
                 //cv.setFormat(wcfCol);//把定义的单元格格式初始化进去
                 //cv.setSize(20);//设置列宽度（不设置的话是0，不会显示）
                //sheet.setColumnView(Integer.valueOf(colStyle[0].toString()), cv);

                //给Excel第一行的列名赋予中文名称
                for(int j=0;j<colNames.length;j++){
                    jxl.write.Label labelCFC = new jxl.write.Label(j, 0, colNames[j],
                            wcfFC);
                    sheet.addCell(labelCFC);
                }

                //参数list集合遍历循环的起始值和结束值
                int num_start = i*MAX_ROWS;
                int num_end = (i+1)*MAX_ROWS;
                int rowNum = 0;

                if(num_end > list.size()){
                    num_end = list.size();
                }
                for(int k=num_start;k<num_end;k++){
                    Map obj = ObjectUtil.beanToMap(list.get(k));
                    Label label = null;
                    int colNum = 0;

                    //循环遍历各列对应对象的属性，并取出值，填充单元格
                    for(String temp:colParams){
                        String value = String.valueOf(obj.get(temp));
                        if(temp.equals(colStyle[0].toString()) && isNum(value)){
                            number = new jxl.write.Number(colNum++,rowNum+1,Double.parseDouble(value),wcfCol);
                            sheet.addCell(number);
                        }else{
                            if(StringUtil.isEmpty(value) || "null".equals(value)){
                                label = new jxl.write.Label(colNum++,rowNum+1,"",wcf_cell);
                            }else{
                                label = new jxl.write.Label(colNum++,rowNum+1,value,wcf_cell);
                            }
                            sheet.addCell(label);
                        }
                    }

                    rowNum++;
                }

            }

            workbook.write();
            workbook.close();
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
            throw new Exception("填充Excel各单元格异常:"+e.getMessage());
        }

    }

    /**
     * 判断其是否为数字
     * @param str
     * @return
     */
    public static boolean isNum(String str){
        return str.matches("^[-+]?(([0-9]+)([.]([0-9]+))?|([.]([0-9]+))?)$");
    }

    /**
     * 解析Excel数据
     * @param inputStream
     * @param colProperty Excel每一列对应的属性名称
     * @param colName Excel的列名称
     * @return
     * @throws Exception
     */
    public static List<Map<String, String>> parseExcelData(InputStream inputStream,String[] colProperty,String[] colName) throws Exception{
         if(colProperty.length == 0){
             throw new Exception("每一列对应的属性值不能为空！");
         }

         List<Map<String,String>> list = new ArrayList<Map<String,String>>();
         Workbook workbook = Workbook.getWorkbook(inputStream);  //处理输入流
         Sheet[] sheet = workbook.getSheets();
         if (sheet != null) {
//       for(int i=0;i<sheet.length;i++){
             int rows = sheet[0].getRows();//获取sheet的总行号
             int cols = sheet[0].getColumns();//获取sheet的总列号

             if(cols != colProperty.length){
                 throw new Exception("列对应的属性与列名不匹配！");
             }
             //根据列名称判断模板是否正确
             for(int m=0;m<colName.length;m++){
                 String tempName = sheet[0].getCell(m, 0).getContents().trim();
                 if(!tempName.equals(colName[m])){
                     throw new Exception("Excel模板不匹配！");
                 }
             }
             //遍历获得每-行每一列信息
             for(int j=1;j<rows;j++){
                 Map<String, String> map = new LinkedHashMap<String, String>();
                 for(int k=0;k<cols;k++){
                     String temp = sheet[0].getCell(k, j).getContents().trim();
                     if(StringUtil.isNotEmpty(temp)){
                         map.put(colProperty[k], temp);
                     }
                 }

                 if(!map.isEmpty()){
                    list.add(map);
                 }
             }
         }
         return list;
    }
}

引用如下：

 //存放信息的数组
 ArrayList<HashMap<String,Object>> acountSelf_data1 = (ArrayList<HashMap<String,Object>>)acountSelf_data.get("acountSelf_data");
 //excel表头
 String[] colNames = {  "公司名称", "账期起始日期","账期停用日期","信用额度","省份","客户类型","门店数","MTD账期GMV","MTD自营现金GMV","MTD活动现金GMV","MTD合计GMV","剩余额度","MTD额度使用率","额度占用率","招商","运营","2017-12GMV","2018-01GMV","2018-02GMV","2018-03GMV","2018-04GMV","2018-05GMV","2018-06GMV","2018-07GMV","GMV"};
 //表头对应的字段名称
 String[] colParams = {     "buyer_name", "start_date", "end_date", "credit_limit", "RCV_REG_PROV", "param_name", "CUST_Count","gmv_mtd_zq","gmv_mtd_xj1","gmv_mtd_xj2","gmv_mtd_all","avl_limit","rate_mtd_use","rate_use","op","bd","2017-12GMV","2018-01GMV","2018-02GMV","2018-03GMV","2018-04GMV","2018-05GMV","2018-06GMV","2018-07GMV","GMV"};
 //25为一共几列，sheetname是sheet名称
 ExcelUtils.setExcel(acountSelf_data1,out,colNames,colParams,null,25);

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