java解析Excel

这里以导入学生成绩为例(Excel)

需要的jar https://download.youkuaiyun.com/download/qq_37996327/10507976

//Controller

//导入学生成绩

@RequestMapping(value = "/stuExcel")
public Object viewExcel(String str, HttpServletRequest request,
HttpServletResponse response) {
//String s[] = str.trim().split(",");
String fileName = "2017-2018学年度专业英语分级考试成绩表";
List<StuscoreVO> list = new ArrayList();
/*for (String id : s) {
StuscoreVO st = stuScoreService.findStudentScore(id);


list.add(st);
}*/
/*List<Map<String, Object>> elist = stuScoreService
.createExcelRecord(list);*/
Map<String, Object> map = new HashMap<String, Object>();
List<Map<String, Object>> elist = new ArrayList<Map<String,Object>>();
map.put("sheetName", "sheet1");
//map.put("sheetName", "sheet2");
elist.add(map);
String biaoji=null;
int a = 0;
//查询考试信息表传入考试ID
List<Examsinee> lists = examineeService.selectExamsaStu("c5a4db59bce54ad289d070a33b06769d");
if(lists!=null)
for(int i=0;i<lists.size();i++){

Map<String, Object> mapValue = new HashMap<String, Object>();
//StuscoreVO sc = new StuscoreVO();
mapValue.put("stuNo", lists.get(i).getStudentId().getStudentUser().getJobNumber());
mapValue.put("stuName", lists.get(i).getStudentId().getStudentUser().getRealname());
mapValue.put("className",lists.get(i).getStudentId().getSchoolClass().getClassName());
mapValue.put("saveName", lists.get(i).getExamssaveId().getEname());
mapValue.put("seetiName", lists.get(i).getRoomId().getExamssiteId().getSiteName());
mapValue.put("roomName", lists.get(i).getRoomId().getRoomname());
if("1".equals(lists.get(i).getStatus()))
mapValue.put("status", "缺考");
if("2".equals(lists.get(i).getStatus()))
mapValue.put("status", "考试中");
if("3".equals(lists.get(i).getStatus()))
mapValue.put("status", "已完成");
if("5".equals(lists.get(i).getStatus()))
mapValue.put("status", "异常");
if("6".equals(lists.get(i).getStatus()))
mapValue.put("status", "作弊");
mapValue.put("score", lists.get(i).getTotalscore());
//查询试卷总分
ExamPage ex = examineeService.findPage(lists.get(i).getExampageId());
mapValue.put("reScore", ex.getScore());
mapValue.put("ming", i+1);
elist.add(mapValue);
}
String columnNames[] = { "学号", "姓名","班级名称", "考试名称", "场次名称", "考场名称", "考试状态", "成绩",
"试卷总分" ,"名次"};
String keys[] = { "stuNo", "stuName","className", "saveName", "seetiName",
"roomName", "status", "score", "reScore","ming"};
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
UseCaseExcelUtil.createWorkBook(elist, keys, columnNames).write(os);
} catch (IOException e) {
e.printStackTrace();
}
byte[] content = os.toByteArray();
InputStream is = new ByteArrayInputStream(content);
response.reset();
response.setContentType("application/vnd.ms-excel;charset=utf-8");
try {
response.setHeader("Content-Disposition", "attachment;filename="
+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));
} catch (UnsupportedEncodingException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
ServletOutputStream out = null;
try {
out = response.getOutputStream();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
bis = new BufferedInputStream(is);
bos = new BufferedOutputStream(out);
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
} catch (final IOException e) {
} finally {
try {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}
return null;

}

package net.englishvod.common.utils;


import java.util.List;
import java.util.Map;


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.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;


public class UseCaseExcelUtil {
public static Workbook createWorkBook(List<Map<String, Object>> list,String []keys,String columnNames[]) {
        // 创建excel工作簿
        Workbook wb = new HSSFWorkbook();
        // 创建第一个sheet（页），并命名
        Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
        // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
        for(int i=0;i<keys.length;i++){
            sheet.setColumnWidth((short) i, (short) (35.7 * 150));
        }


        // 创建第一行
        Row row = sheet.createRow((short) 0);


        // 创建两种单元格格式
        CellStyle cs = wb.createCellStyle();
        CellStyle cs2 = wb.createCellStyle();


        // 创建两种字体
        Font f = wb.createFont();
        Font f2 = wb.createFont();


        // 创建第一种字体样式（用于列名）
        f.setFontHeightInPoints((short) 10);
        f.setColor(IndexedColors.BLACK.getIndex());
        f.setBoldweight(Font.BOLDWEIGHT_BOLD);


        // 创建第二种字体样式（用于值）
        f2.setFontHeightInPoints((short) 10);
        f2.setColor(IndexedColors.BLACK.getIndex());


//         Font f3=wb.createFont();
//         f3.setFontHeightInPoints((short) 10);
//         f3.setColor(IndexedColors.RED.getIndex());


        // 设置第一种单元格的样式（用于列名）
        cs.setFont(f);
        cs.setBorderLeft(CellStyle.BORDER_THIN);
        cs.setBorderRight(CellStyle.BORDER_THIN);
        cs.setBorderTop(CellStyle.BORDER_THIN);
        cs.setBorderBottom(CellStyle.BORDER_THIN);
        cs.setAlignment(CellStyle.ALIGN_CENTER);


        // 设置第二种单元格的样式（用于值）
        cs2.setFont(f2);
        cs2.setBorderLeft(CellStyle.BORDER_THIN);
        cs2.setBorderRight(CellStyle.BORDER_THIN);
        cs2.setBorderTop(CellStyle.BORDER_THIN);
        cs2.setBorderBottom(CellStyle.BORDER_THIN);
        cs2.setAlignment(CellStyle.ALIGN_CENTER);
        //设置列名
        for(int i=0;i<columnNames.length;i++){
            Cell cell = row.createCell(i);
            cell.setCellValue(columnNames[i]);
            cell.setCellStyle(cs);
        }
        //设置每行每列的值
        for (short i = 1; i < list.size(); i++) {
            // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
            // 创建一行，在页sheet上
            Row row1 = sheet.createRow((short) i);
            // 在row行上创建一个方格
            for(short j=0;j<keys.length;j++){
                Cell cell = row1.createCell(j);
                cell.setCellValue(list.get(i).get(keys[j]) == null?" ": list.get(i).get(keys[j]).toString());
                cell.setCellStyle(cs2);
            }
        }
        return wb;
    }

}