Java_导出Excel

导出的Excel标题、Sheet名称、数据内容都可以使用中文​

一、pom.xml引入jar包

< dependency >
            < groupId >org.apache.poi</ groupId >
            < artifactId >poi-ooxml</ artifactId >
            < version >3.13</ version >
        </ dependency >

二、Excel操作内部类

import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.*;

public class ExportInternalUtil {
    private XSSFWorkbook wb = null ;

    private XSSFSheet sheet = null ;

    /**
     * @param wb
     * @param sheet
     */
    public ExportInternalUtil(XSSFWorkbook wb, XSSFSheet sheet) {
        this .wb = wb;
        this .sheet = sheet;
    }

    /**
     * 合并单元格后给合并后的单元格加边框
     *
     * @param region
     * @param cs
     */
    public void setRegionStyle(CellRangeAddress region, XSSFCellStyle cs) {

        int toprowNum = region.getFirstRow();
        for ( int i = toprowNum; i <= region.getLastRow(); i++) {
            XSSFRow row = sheet.getRow(i);
            for ( int j = region.getFirstColumn(); j <= region.getLastColumn(); j++) {
                XSSFCell cell = row.getCell(j); // XSSFCellUtil.getCell(row,
                                                // (short) j);
                cell.setCellStyle(cs);
            }
        }
    }

    /**
     * 设置表头的单元格样式
     *
     * @return
     */
    public XSSFCellStyle getHeadStyle() {
        // 创建单元格样式
        XSSFCellStyle cellStyle = wb.createCellStyle();
        // 设置单元格的背景颜色为淡蓝色
        cellStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
        cellStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
        // 设置单元格居中对齐
        cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
        // 设置单元格垂直居中对齐
        cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
        // 创建单元格内容显示不下时自动换行
        cellStyle.setWrapText( true );
        // 设置单元格字体样式
        XSSFFont font = wb.createFont();
        // 设置字体加粗
        font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName( "宋体" );
        font.setFontHeight(( short ) 200 );
        cellStyle.setFont(font);
        // 设置单元格边框为细线条
        cellStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);
        return cellStyle;
    }

    /**
     * 设置表体的单元格样式
     *
     * @return
     */
    public XSSFCellStyle getBodyStyle() {
        // 创建单元格样式
        XSSFCellStyle cellStyle = wb.createCellStyle();
        // 设置单元格居中对齐
        cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
        // 设置单元格垂直居中对齐
        cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
        // 创建单元格内容显示不下时自动换行
        cellStyle.setWrapText( true );
        // 设置单元格字体样式
        XSSFFont font = wb.createFont();
        // 设置字体加粗
        font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName( "宋体" );
        font.setFontHeight(( short ) 200 );
        cellStyle.setFont(font);
        // 设置单元格边框为细线条
        cellStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);
        cellStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);
        return cellStyle;
    }
}

三、Excel操作类

       共外部调用，可设置Sheet名称、标题、数据等

import java.io.IOException;
import java.util.ArrayList;

import javax.servlet.ServletOutputStream;

import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import com.james.domain.User;

public class ExportUtil {

    public static void ExportExcel(String[] titles, ArrayList<User> list, ServletOutputStream outputStream) {
        // 创建一个workbook 对应一个excel应用文件
        XSSFWorkbook workBook = new XSSFWorkbook();
        // 在workbook中添加一个sheet,对应Excel文件中的sheet
        //Sheet名称，可以自定义中文名称
        XSSFSheet sheet = workBook.createSheet( "Sheet1" );
        ExportInternalUtil exportUtil = new ExportInternalUtil(workBook, sheet);
        XSSFCellStyle headStyle = exportUtil.getHeadStyle();
        XSSFCellStyle bodyStyle = exportUtil.getBodyStyle();
        // 构建表头
        XSSFRow headRow = sheet.createRow( 0 );
        XSSFCell cell = null ;

        // 输出标题
        for ( int i = 0 ; i < titles.length; i++) {
            cell = headRow.createCell(i);
            cell.setCellStyle(headStyle);
            cell.setCellValue(titles[i]);
        }
        // 构建表体数据
        for ( int j = 0 ; j < list.size(); j++) {
            XSSFRow bodyRow = sheet.createRow(j + 1 );
            User user = list.get(j);

            cell = bodyRow.createCell( 0 );
            cell.setCellStyle(bodyStyle);
            cell.setCellValue(user.getLastIp());

            cell = bodyRow.createCell( 1 );
            cell.setCellStyle(bodyStyle);
            cell.setCellValue(user.getLastVisit());

            cell = bodyRow.createCell( 2 );
            cell.setCellStyle(bodyStyle);
            cell.setCellValue(user.getPassword());

            cell = bodyRow.createCell( 3 );
            cell.setCellStyle(bodyStyle);
            cell.setCellValue(user.getUserName());

            cell = bodyRow.createCell( 4 );
            cell.setCellStyle(bodyStyle);
            cell.setCellValue(user.getUserId());
        }

        try {
            workBook.write(outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

四、SpringMVC Controller层调用

@RequestMapping (value = "/excelDownload" )
    public String exportExcel(HttpServletResponse response) {
        try {
            //String fileName = new String(("导出excel标题").getBytes(), "UTF-8") + ".xlsx";
            String fileName= new String(( "导出excel标题" ).getBytes( "gb2312" ), "iso8859-1" )+ ".xlsx" ;
            response.setContentType( "application/vnd.ms-excel;charset=UTF-8" );
            response.setHeader( "Content-Disposition" , "attachment;filename=" + fileName);
            response.setCharacterEncoding( "utf-8" );

            // response.setHeader("Content-disposition", "attachment; filename="
            // + "exdddcel" + ".xlsx");// 组装附件名称和格式

            String[] titles = { "最后IP" , "最后访问时间" , "密码" , "用户名" , "用户编号" };

            /*SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            String date = df.format(new Date());
            Date dateNow = null;
            try {
                dateNow = df.parse(date);
            } catch (ParseException e) {
                e.printStackTrace();
            }*/
            Date dateNow = new Date();

            ArrayList<User> users = new ArrayList<User>();
            User user = new User();
            user.setLastIp( "127.0.0.1" );
            user.setLastVisit(dateNow);
            user.setPassword( "123" );
            user.setUserId( 1 );
            user.setUserName( "名称：James" );
            users.add(user);

            user = new User();
            user.setLastIp( "192.0.0.1" );
            user.setLastVisit(dateNow);
            user.setPassword( "456" );
            user.setUserId( 2 );
            user.setUserName( "名称：Mary" );
            users.add(user);

            ServletOutputStream outputStream = response.getOutputStream();
            ExportUtil.ExportExcel(titles, users, outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null ;
    }

五、程序中用到的实体类User

import java.io.Serializable;
import java.util.Date;

public class User implements Serializable {
    private int userId;

    private String userName;

    private String password;

    private String lastIp;

    private Date lastVisit;

    public int getUserId() {
        return userId;
    }

    public void setUserId( int userId) {
        this .userId = userId;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this .userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this .password = password;
    }

    public String getLastIp() {
        return lastIp;
    }

    public void setLastIp(String lastIp) {
        this .lastIp = lastIp;
    }

    public Date getLastVisit() {
        return lastVisit;
    }

    public void setLastVisit(Date lastVisit) {
        this .lastVisit = lastVisit;
    }
}

六、异常情况

1、标题乱码（注释代码会出现标题乱码）

//String fileName = new String(("导出excel标题").getBytes(), "UTF-8") + ".xlsx";
            String fileName= new String(( "导出excel标题" ).getBytes( "gb2312" ), "iso8859-1" )+ ".xlsx" ;

七、参考文档

1、http://webook-java.iteye.com/blog/1699621

2、http://www.cnblogs.com/yjmyzz/p/4206463.html

来自为知笔记(Wiz)