我的代码段是处理教师信息,将教师EXCEL输入数据库
我写了两中代码
第一种,能用,但是小程序访问后台时不能正常访问,原因是 multipart 的配置文件与小程序起冲突,于是我放弃第一种。
第二种,简单,就是从后台接收到普通文件,然后转成multipart文件,然后继续调用之前方法。
jsp 代码段
<form class="form-inline" id="form_excel" name="form_excel" role="form"
action="${pageContext.request.contextPath}/admin/addStudent"
method="post" enctype="multipart/form-data">
<div class="form-group" style="padding-top: 2%">
<label class="sr-only" for="file_excel">文件输入 </label>
<input type="file" id="file_excel" name="file_excel">
</div>
<button type="submit" class="btn btn-default" style="margin-top: 2%">提交
</button>
</form>
在与后台进行数据交互时需要添加依赖包
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.3.2</version>
</dependency>
开始后台代码
import org.apache.http.entity.ContentType;
这个包
@RequestMapping(value="AddTeacher",method= {RequestMethod.POST})
public ModelAndView DoExcelTeacher(HttpServletRequest request) throws Exception {
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setSizeMax(4194304); // 设置最大文件尺寸,这里是4MB
List<FileItem> items = new ArrayList<FileItem>();
try {
items = upload.parseRequest(request);
} catch (FileUploadException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
File file = new File("");
for(FileItem fi : items) {
File fullFile = new File(new String(fi.getName().getBytes(), "utf-8")); // 解决文件名乱码问题,获得文件内容
file = new File("/home/wenruo/Desktop/userInfo", fullFile.getName()); // 为文件设置存储路径
fi.write(file);
}
FileInputStream fileInputStream = new FileInputStream(file);
MultipartFile multipartFile = new MockMultipartFile(file.getName(), file.getName(),
ContentType.APPLICATION_OCTET_STREAM.toString(), fileInputStream);
ModelAndView mv = new ModelAndView();
String readResult =null;
try {
//调用ITeacherService 下的方法,完成增加教师
readResult = iAdminService.addTeacherInfo(multipartFile);
} catch (Exception e) {
e.printStackTrace();
}
mv = readTeacherInfo();
mv.addObject("readResult", readResult);//返回信息
return mv;
}
addTeacher()接口
public String addTeacherInfo(MultipartFile file) throws Exception;
实现方法
public String addTeacherInfo(MultipartFile file) throws Exception {
//创建处理EXCEL的类
ReadTeacherExcel readExcel=new ReadTeacherExcel();
//解析excel,获取上传的事件单
List<Teacher> teacherList = null;
int insertResult = 0;//记录插入数
String insertMsg = "";
try {
teacherList = readExcel.getExcelInfo(file); //调用函数,获取到装有Teacher对象的teacherList集合
for(Teacher s :teacherList) {
s.setTeacherPassword(Common.eccryptMD5(s.getTeacherPassword()));
insertResult++;
System.out.println(s.toString()); //输出每条插入的数据
}
iAdminDao.addTeacherInfo(teacherList); //调用函数,完成写入数据库操作
if(insertResult ==0) {
insertMsg = "载入数据库失败";
}else if(insertResult == teacherList.size()){
insertMsg = "全部载入数据库";
}else {
insertMsg = "部分载入数据库";
}
} catch (Exception e) {
e.printStackTrace();
System.err.println(insertMsg);
System.err.println("接受excel表格中的数据失败!");
}
for(Teacher s : teacherList) {
System.out.println("打印excel中的数据"+s.toString());
}
return insertMsg;
}
getExcelInfo(file)
核心代码段
package cn.edu.tit.common;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
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.NumberToTextConverter;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;
import cn.edu.tit.bean.Admin;
import cn.edu.tit.bean.Teacher;
/**
* 读取教师EXCEL表
* @author
* */
public class ReadTeacherExcel {
// 总行数
private int totalRows = 0;
// 总条数
private int totalCells = 0;
// 错误信息接收器
private String errorMsg;
// 构造方法
public ReadTeacherExcel() {
}
// 获取总行数
public int getTotalRows() {
return totalRows;
}
// 获取总列数
public int getTotalCells() {
return totalCells;
}
// 获取错误信息
public String getErrorInfo() {
return errorMsg;
}
/**
* 读EXCEL文件,获取信息集合
*
* @param fielName
* @return
*/
public List<Teacher> getExcelInfo(MultipartFile mFile) {
String fileName = mFile.getOriginalFilename();// 获取文件名
List<Teacher> teacherList = new ArrayList<Teacher>();
try {
// 验证文件名是否合格
if (!validateExcel(fileName)) {
return null;
}
// 根据文件名判断文件是2003版本还是2007版本
boolean isExcel2003 = true;
if (isExcel2007(fileName)) {
isExcel2003 = false;
}
teacherList = createExcel(mFile.getInputStream(), isExcel2003);
} catch (Exception e) {
e.printStackTrace();
}
return teacherList;
}
/**
* 根据excel里面的内容读取信息
* @param is 输入流
* @param isExcel2003 excel是2003还是2007版本
* @throws IOException
*/
public List<Teacher> createExcel(InputStream is, boolean isExcel2003) {
List<Teacher> teacherList = new ArrayList<Teacher>();
try {
Workbook wb = null;
if (isExcel2003) {// 当excel是2003时,创建excel2003
wb = new HSSFWorkbook(is);
} else {// 当excel是2007时,创建excel2007
wb = new XSSFWorkbook(is);
}
teacherList = readExcelValue(wb);// 读取Excel里面的信息
} catch (IOException e) {
e.printStackTrace();
}
for (Teacher teacher2 : teacherList) {
System.out.println(teacher2.toString());
}
return teacherList;
}
/**
* 读取Excel里面的信息
*
* @param wb
* @return
*/
private List<Teacher> readExcelValue(Workbook wb) {
// 得到第一个shell
Sheet sheet = wb.getSheetAt(0);
// 得到Excel的行数
this.totalRows = sheet.getPhysicalNumberOfRows();
// 得到Excel的列数(前提是有行数)
if (totalRows > 1 && sheet.getRow(0) != null) {
this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
}
List<Teacher> teacherList = new ArrayList<Teacher>();
/**
* 核心主体,处理EXCEL文件,读取excel文件信息
* 此处方法为循环处理
* 第一层循环为循环行
* 第二层循环为循环列
*
* 此处对EXCEL表的格式限制为:第一行第一列开始为数据,并且列次递增数据分别为
* 工号、教师名、教师密码、教师性别、教育背景、教师职称、教师电话、电子邮箱
* */
// 循环Excel行数
for (int r = 0; r < totalRows; r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}
Teacher teacher = new Teacher();
//循环Excel的列
for (int c = 0; c < this.totalCells; c++) {
Cell cell = row.getCell(c);
/**
* 切记判空,否则在getvalue()处将报空指针
* */
if(cell == null)
{
continue;
}
switch (c) {
case 0:
teacher.setEmployeeNum(getValue(cell));//设置工号
break;
case 1:
teacher.setTeacherName(getValue(cell));//设置教师名
break;
case 2:
teacher.setTeacherPassword(getValue(cell));//设置教师密码
break;
case 3:
teacher.setTeacherGender(getValue(cell));//设置教师性别
break;
case 4:
teacher.setEducationBackground(getValue(cell));//设置教育背景
break;
case 5:
teacher.setProfessionalTitles(getValue(cell));//设置教师职称
break;
case 6:
teacher.setTelephone(getValue(cell));//设置教师电话
break;
case 7:
teacher.setEmail(getValue(cell));//设置教师电子邮箱
break;
case 8:
teacher.setFaceImg(null);
break;
case 9:
teacher.setTeacherNickName(null);
break;
case 10:
teacher.setStatus(null);;
break;
case 11:
teacher.setTeacherCategory(null);;
break;
default:
break;
}
}
if(teacher.getEmployeeNum()!=null)
{
teacherList.add(teacher);
}
}
return teacherList;
}
/**
* 获取单元格信息
* 数据库存储的均为VARCHAR类型数据
* 将所有数据返回均设定为String类型数据
*/
private String getValue(Cell cell) {
if (cell.getCellType() == cell.CELL_TYPE_BOOLEAN) {
// 返回布尔类型的值
return String.valueOf(cell.getBooleanCellValue());
} else if (cell.getCellType() == cell.CELL_TYPE_NUMERIC) {
// 返回数值类型的值
return NumberToTextConverter.toText(cell.getNumericCellValue());
} else {
// 返回字符串类型的值
return String.valueOf(cell.getStringCellValue());
}
}
/**
* 验证EXCEL文件
*/
public boolean validateExcel(String fileName) {
//文件名为空、不是2003、不是2007
if (fileName == null || !(isExcel2003(fileName) || isExcel2007(fileName))) {
errorMsg = "文件名不是excel格式";
return false;
}
return true;
}
//是否是2003的excel,返回true是2003
public static boolean isExcel2003(String fileName) {
return fileName.matches("^.+\\.(?i)(xls)$");
}
//是否是2007的excel,返回true是2007
public static boolean isExcel2007(String fileName) {
return fileName.matches("^.+\\.(?i)(xlsx)$");
} }