list集合对象以excel导出

一：模板

　　

package  com.hailian.util;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.Validate;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
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.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author WangXuzheng
 *
 */
public abstract class SettlrExcelExportTemplate<T> implements ExcelExportTemplate<T> {
    Logger logger=LoggerFactory.getLogger(SettlrExcelExportTemplate.class);
    /**
     * 默认表格宽度
     */
    private static final int DEFAULT_COLUMN_WIDTH = 5000;
    /**
     * excel文件对象
     */
    protected Workbook  workbook;
    /**
     * excel sheet列表
     */
    protected List<Sheet> sheets = new ArrayList<Sheet>();
    /**
     * 标题栏
     */
    protected String[][] titles;
    protected CellStyle captionRowSytle;
    /**
     * 默认标题行样式
     */
    protected CellStyle titleRowStyle;
    /**
     * 默认内容行样式
     */
    protected CellStyle bodyRowStyle;
    /**
     * 各个sheet是否包含抬头,key:sheet坐标，value:包含true,否则false
     */
    protected Map<Integer, Boolean> hasCaptionMap = new HashMap<Integer, Boolean>();
    /**
     * 默认单元格宽度
     */
    protected int columnWidth = DEFAULT_COLUMN_WIDTH;
    /**
     * 参数列表
     */
    protected T parameters;

    /* (non-Javadoc)
     * @see com.haier.openplatform.excel.ExcelExportService#doExport(java.io.OutputStream)
     */
    @Override
    public void doExport(HttpServletResponse response,String fileName) throws IOException {
         String[] sheetNames = this.getSheetNames();
        Validate.notEmpty(sheetNames);
        this.workbook = new SXSSFWorkbook(getRowAccessWindowSize());
        this.titles = this.getTitles();
        this.captionRowSytle = crateCaptionCellStyle();
        this.titleRowStyle = crateTitleCellStyle();
        this.bodyRowStyle = crateBodyCellStyle();
        this.afterCreateWorkBook();
        
        for (int i = 0; i < sheetNames.length; i++) {
            Sheet sheet = workbook.createSheet(sheetNames[i]);
            this.sheets.add(sheet);
            afterBuildSheet(i);
            buildCaption(i);
            buildTitle(i);
            afterBuildTitle(i);
            buildBody(i);
            afterBuildBody(i);
        }
        response.setContentType("application/vnd.ms-excel");     
        response.setHeader("Content-disposition", "attachment;filename=" + fileName);     
        OutputStream ouputStream = response.getOutputStream();     
        workbook.write(ouputStream);     
        ouputStream.flush();     
        //workbook.close();
        ouputStream.close(); 
        
    }

    /**
     * 创建单元格
     * @param row
     * @param index
     * @param cellValue
     * @param cellStyle
     */
    protected void createStyledCell(Row row,int index,String cellValue,CellStyle cellStyle){
        Cell cell = row.createCell(index);
        cell.setCellValue(cellValue==null?"":cellValue);
        cell.setCellStyle(cellStyle);
    }
    /**
     * 创建单元格（数字类型）
     * @param row
     * @param index
     * @param cellValue
     * @param cellStyle
     * @throws Exception 
     */
    protected <E extends Number> void createNumStyledCell(Row row,int index,E cellValue,CellStyle cellStyle){
        Cell cell = row.createCell(index);
        cell.setCellValue(numParseDouble(cellValue));
        cell.setCellStyle(cellStyle);
    }
    /**
     * 数字类型转double
     * @param e
     * @return
     */
    private  <E extends Number> Double numParseDouble(E e){
        double value=0;
        if(e!=null){
            Method m;
            try {
                m = e.getClass().getMethod("doubleValue");
                value=(Double)m.invoke(e);
            } catch (Exception e1) {
                logger.error(e1.getMessage(),e1);
            }
        }
        return value;
    }
    /**
     * 创建单元格
     * @param row
     * @param index
     * @param cellValue
     * @param cellStyle
     */
    protected void createStyledCell(Row row,int index,Double cellValue,CellStyle cellStyle){
        Cell cell = row.createCell(index);
        if(cellValue==null){
            cell.setCellValue("");
        }else{
            cell.setCellValue(cellValue);
        }
        cell.setCellStyle(cellStyle);
    }
    
    /**
     * 创建Integer单元格
     * @param row
     * @param index
     * @param cellValue
     * @param cellStyle
     */
    protected void createStyledCell(Row row,int index,Integer cellValue,CellStyle cellStyle){
        Cell cell = row.createCell(index);
        if(cellValue==null){
            cell.setCellValue("");
        }else{
            cell.setCellValue(cellValue);
        }
        cell.setCellStyle(cellStyle);
    }    
    /**
     * @description 创建double类型单元格
     * @author lau
     * @version 2016-7-13上午11:36:06
     * @param
     */
    protected void createStyledCell(Row row,int index,Long cellValue,CellStyle cellStyle){
        Cell cell = row.createCell(index);
        if(cellValue==null){
            cell.setCellValue("");
        }else{
            cell.setCellValue(cellValue);
        }
        cell.setCellStyle(cellStyle);
    }
    
    /**
     * 在创建完毕HSSFWorkBook对象和样式对象后作的处理操作，通常用来对默认的样式进行重新定义
     */
    protected void afterCreateWorkBook(){
    }
    /**
     * 获取excel抬头样式
     * @return
     */
    protected CellStyle crateCaptionCellStyle() {
        Font font = workbook.createFont();
        font.setColor(Font.COLOR_NORMAL);
        CellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setWrapText(false);
        font.setFontHeight((short)250);
        cellStyle.setFont(font);
        cellStyle.setFillForegroundColor(IndexedColors.BLUE_GREY.index);
        cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
        cellStyle.setAlignment(CellStyle.ALIGN_CENTER);
        return cellStyle;
    }
    
    /**
     * 获取excel表头样式
     * @return
     */
    protected CellStyle crateTitleCellStyle() {
        Font font = workbook.createFont();
        font.setFontHeightInPoints((short) 9);// 字体大小
        font.setColor(HSSFColor.WHITE.index);// 字体颜色
        font.setFontName("微软雅黑");
//        font.setColor(Font.COLOR_NORMAL);
        CellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setWrapText(false);
        font.setFontHeight((short)250);
        cellStyle.setFont(font);
        cellStyle.setFillForegroundColor(HSSFColor.ROYAL_BLUE.index);
        cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
        short border = 1;
        setCellBorder(cellStyle,border,border,border,border);
        cellStyle.setAlignment(CellStyle.ALIGN_CENTER);
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        return cellStyle;
    }
    
    /**
     * 设置单元格的border
     * @param cellStyle
     * @param top
     * @param bottom
     * @param left
     * @param right
     */
    protected void setCellBorder(CellStyle cellStyle,short top,short bottom,short left,short right){
        cellStyle.setBorderBottom(bottom);
        cellStyle.setBorderLeft(left);
        cellStyle.setBorderRight(right);
        cellStyle.setBorderTop(top);
    }
    
    /**
     * 获取excel内容样式
     * @return
     */
    protected CellStyle crateBodyCellStyle() {
        Font font = workbook.createFont();
        //font.setColor(HSSFColor.BLUE_GREY.index);
        font.setFontHeightInPoints((short) 9);// 字体大小
        font.setColor(HSSFColor.BLACK.index);// 字体颜色
        font.setFontName("微软雅黑");
        
        CellStyle cellStyle = workbook.createCellStyle();
        cellStyle.setWrapText(false);
        cellStyle.setFont(font);
        cellStyle.setFillForegroundColor(HSSFColor.WHITE.index);
        cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
        cellStyle.setAlignment(CellStyle.ALIGN_LEFT);
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        short border = 1;
        setCellBorder(cellStyle,border,border,border,border);
        return cellStyle;
    }

    /**
     * 获取第n个excel sheet
     * @param sheetIndex
     * @return
     */
    protected Sheet getSheet(int sheetIndex) {
        return this.sheets.get(sheetIndex);
    }

    /**
     * 创建sheet完毕后做的操作
     * @param sheetIndex
     */
    protected void afterBuildSheet(int sheetIndex) {
    }
    
    /**
     * 在sheet的第一行插入标题
     * @param sheetIndex
     */
    protected void buildCaption(int sheetIndex){
        Sheet sheet = getSheet(sheetIndex);
        String[] captions = this.getCaptions(); 
        hasCaptionMap.put(sheetIndex, false);
        if(captions != null && captions.length >=sheetIndex +1){
            String caption = captions[sheetIndex];
            if(StringUtils.isNotBlank(caption)){
                Row row = sheet.createRow(0);
                int lastColumn = calculateLastColumn(sheetIndex);
                CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 0, 0, lastColumn);
                sheet.addMergedRegion(cellRangeAddress);
                createStyledCell(row, 0, caption, this.captionRowSytle);
                hasCaptionMap.put(sheetIndex, true);
            }
        }
    }
    
    /**
     * 计算最后一列数据数据的
     * @param sheetIndex
     * @return
     */
    protected int calculateLastColumn(int sheetIndex){
        if(this.titles != null && sheetIndex <= this.titles.length -1 && this.titles[sheetIndex] != null){
            return this.titles[sheetIndex].length - 1;
        }else{
            return 1;
        }
    }

    /**
     * 创建sheet中数据的标题
     * @param sheetIndex
     */
    protected void buildTitle(int sheetIndex){
        // TODO Auto-generated method stub
        if(this.titles.length < sheetIndex + 1){
            return;
        }
        String[] ts = this.titles[sheetIndex];
        if(ts == null){
            return;
        }
        //表头样式创建
        titleRowStyle=crateTitleCellStyle();
        //表头数填充
        Sheet sheet=this.getSheet(sheetIndex);
        int titleStartRow=this.getTitleStartIndex(sheetIndex);
        for(int i=titleStartRow;i<this.titles.length+titleStartRow;i++){
            Row title=sheet.createRow(i);
            for(int j=0;j<this.titles[i].length;j++){
                sheet.setColumnWidth(j, columnWidth);
                createStyledCell(title, j, this.titles[i][j], titleRowStyle);
            }
        }
    }
    
    /**
     * 获取各个sheet内容部分起始行index,默认为从第一行开始
     * @param sheetIndex sheet的index
     * @return
     */
    protected int getBodyStartIndex(int sheetIndex){
        int captionRow = getTitleStartIndex(sheetIndex);;
        int titleRow = 0;
        if(this.titles != null && this.titles.length >= sheetIndex + 1){
            if(titles[sheetIndex] != null && titles[sheetIndex].length >0){
                titleRow = 1;
            }
        }
        return captionRow + titleRow;
    }
    
    /**
     * 获取各个sheet内容部分起始行index,默认为从第一行开始，支持三行以上动态表头
     * @param sheetIndex sheet的index
     * @return
     */
    protected int getBodyStartIndex1(int sheetIndex){
        int captionRow = getTitleStartIndex(sheetIndex);;
        int titleRow = 0;
        if(this.titles != null && this.titles.length >= sheetIndex + 1){
            if(titles[sheetIndex] != null && titles.length >0){
                titleRow = titles.length;
            }
        }
        return captionRow + titleRow;
    }

    protected int getTitleStartIndex(int sheetIndex){
        return this.hasCaptionMap.get(sheetIndex) ? 1 : 0;
    }
    /**
     * 创建sheet中数据的标题之后做的操作
     * @param sheetIndex
     */
    protected void afterBuildTitle(int sheetIndex) {
    }

    /**
     * 创建sheet中数据的内容
     * @param sheetIndex
     */
    protected abstract void buildBody(int sheetIndex);

    /**
     * 创建sheet中数据的内容之后做的操作
     * @param sheetIndex
     */
    protected void afterBuildBody(int sheetIndex) {
    }

    @Override
    public String[] getCaptions() {
        return new String[]{};
    }

    @Override
    public int getRowAccessWindowSize() {
        return 200;
    }
}

二：继承模板

　　

package com.hailian.util;

import com.hailian.modules.admin.ordermanager.model.CreditOrderInfo;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.ss.usermodel.*;

import java.util.ArrayList;
import java.util.List;



public class AchievementsExport extends SettlrExcelExportTemplate {
    
private List<CreditOrderInfo> list = new ArrayList<CreditOrderInfo>();
    
    public AchievementsExport(List<CreditOrderInfo> list) {
        super();
        this.list = list;
    }

    @Override
    public String[] getSheetNames() {
        return new String[] { "订单绩效" };
    }

    @Override
    public String[][] getTitles() {
        return new String[][] { 
                {"名称","订单日期","到期日期","客户代码","订单公司名称","公司中文名称","扣分情况","提成"},
        };
    }

    @Override
    public String[] getCaptions() {
        return null;
    }

    @Override
    protected void buildBody(int sheetIndex) {
        
        bodyRowStyle=crateBodyCellStyle();
        bodyRowStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        CellStyle bodyLeftStyle=crateBodyCellStyle();
        CellStyle bodyRightStyle=crateBodyCellStyle();
        bodyRightStyle.setAlignment(HSSFCellStyle.ALIGN_RIGHT);
        bodyLeftStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);
        bodyRightStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00"));
        
        CellStyle bodyCenterStyle=crateBodyCellStyle();
        bodyCenterStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        
        // 设置为文本格式，防止身份证号变成科学计数法  
        DataFormat format = workbook.createDataFormat();  
        bodyLeftStyle.setDataFormat(format.getFormat("@"));  
        
        Sheet sheet = getSheet(sheetIndex);
        int startIndex = this.getBodyStartIndex(sheetIndex);
//        SimpleDateFormat dateFm = new SimpleDateFormat("yyyy-MM-dd"); //格式化当前系统日期

        for (int i = 0; i < list.size(); i++) {
            int index = 0;
            Row row1 = sheet.createRow(i + startIndex );
            Cell cell1 = row1.createCell((short) 1);  
            cell1.setCellStyle(bodyLeftStyle);
            row1.setHeight((short) 300);
        CreditOrderInfo searchIndex = list.get(i);
            createStyledCell(row1, index++, searchIndex.get("reportName")==null? "":searchIndex.get("reportName").toString(),bodyRowStyle);
            createStyledCell(row1, index++, searchIndex.get("receiver_date")==null? "":searchIndex.get("receiver_date").toString(),bodyLeftStyle);
            createStyledCell(row1, index++, searchIndex.get("end_date")==null? "":searchIndex.get("end_date").toString(),bodyLeftStyle);
            createStyledCell(row1, index++, searchIndex.get("custom_id")==null? "":searchIndex.get("custom_id").toString(),bodyRowStyle);
            createStyledCell(row1, index++, searchIndex.get("englishName")==null? "":searchIndex.get("englishName").toString(),bodyRowStyle);
            createStyledCell(row1, index++, searchIndex.get("companyName")==null? "":searchIndex.get("companyName").toString(),bodyRowStyle);
            createStyledCell(row1, index++, searchIndex.get("custom_id")==null? "":searchIndex.get("custom_id").toString(),bodyRowStyle);
            createStyledCell(row1, index++, searchIndex.get("custom_id")==null? "":searchIndex.get("custom_id").toString(),bodyRowStyle);
            
        }
        sheet.setColumnWidth(0, 7000);
        sheet.setColumnWidth(1, 3000);
        sheet.setColumnWidth(2, 3000);
        sheet.setColumnWidth(3, 3000);
        sheet.setColumnWidth(4, 3000);
        sheet.setColumnWidth(5, 4000);
        sheet.setColumnWidth(6, 4000);
        sheet.setColumnWidth(7, 4000);
        sheet.setColumnWidth(8, 4000);
        
    
    }

}

三：调用

　　

    public void AchievementsExport() {
        String fileName="订单绩效-"+sdf.format(new Date())+".xlsx";
        String time = getPara("time");
        String reportername=getPara("reportername");
        SysUser user= (SysUser) getSessionUser();
        boolean isadmin=isAdmin(user);
        String userid = getSessionUser().getUserid()+"";
        if(isadmin){
            userid="";
        }
        List<CreditOrderInfo> infos  = OrderManagerService.service.exportAchievements(reportername,time,userid,this);
        com.hailian.util.AchievementsExport AchievementsExport=new com.hailian.util.AchievementsExport(infos);
         try {
             fileName=new String(fileName.getBytes("GBK"), "ISO-8859-1");
             AchievementsExport.doExport(getResponse(), fileName);
        renderJson("导出成功");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            renderJson("导出失败");
        }
    }

 注意需要引入相关poi jar包