java实现excel文件上传，解析，导入

首先要新建excel的变量，创建工作布，这里要用到poi相关jar包，我会直接上传到我的资源中

下面以面试管理的试题管理系统为例，上代码：package it.com.excel;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.springframework.stereotype.Repository;

@Repository
public class InputOutput {

/**
* 到入Excel文件
*/
public List<Map> importExcel(String xlsPath){
List<Map> qstList = new ArrayList<Map>();

//需要解析的Excel文件
File file = new File(xlsPath);
try {
//创建Excel，读取文件内容
HSSFWorkbook workbook =
new HSSFWorkbook(FileUtils.openInputStream(file));
//获取第一个工作表workbook.getSheet("Sheet0");
// HSSFSheet sheet = workbook.getSheet("Sheet0");
//读取默认第一个工作表sheet
HSSFSheet sheet = workbook.getSheetAt(0);
int firstRowNum = 1;
//获取sheet中最后一行行号
int lastRowNum = sheet.getLastRowNum();

for (int i = firstRowNum; i <=lastRowNum; i++) {
HSSFRow row = sheet.getRow(i);
//获取当前行最后单元格列号
//int lastCellNum = row.getLastCellNum();

//HSSFCell cell = row.getCell(i);
// String value = cell.getStringCellValue();
// System.out.print(value + " ");

//创建实体类

Map<String, String> map = new HashMap<String, String>();
if(row.getCell(0)!=null){
row.getCell(0).setCellType(Cell.CELL_TYPE_STRING);
map.put("detail",row.getCell(0).getStringCellValue());

}else {
map.put("detail",null);
}
if(row.getCell(1)!=null){
row.getCell(1).setCellType(Cell.CELL_TYPE_STRING);
map.put("A", row.getCell(1).getStringCellValue());
}else {
map.put("A", null);
}
if(row.getCell(2)!=null){
row.getCell(2).setCellType(Cell.CELL_TYPE_STRING);
map.put("B", row.getCell(2).getStringCellValue());
}else {
map.put("B",null);
}
if(row.getCell(3)!=null){
row.getCell(3).setCellType(Cell.CELL_TYPE_STRING);
map.put("C", row.getCell(3).getStringCellValue());
}else {
map.put("C", null);
}
if(row.getCell(4)!=null){
row.getCell(4).setCellType(Cell.CELL_TYPE_STRING);
map.put("D", row.getCell(4).getStringCellValue());
}else {
map.put("D",null);
}
if(row.getCell(5)!=null){
row.getCell(5).setCellType(Cell.CELL_TYPE_STRING);
map.put("quesanswer", row.getCell(5).getStringCellValue());
}else {
map.put("quesanswer",null);
}
if(row.getCell(6)!=null){
row.getCell(6).setCellType(Cell.CELL_TYPE_STRING);
map.put("diffculty", row.getCell(6).getStringCellValue());
}else {
map.put("diffculty",null);
}
if(row.getCell(7)!=null){
row.getCell(7).setCellType(Cell.CELL_TYPE_STRING);
map.put("position", row.getCell(7).getStringCellValue());
}else {
map.put("position", null);
}
if(row.getCell(8)!=null){
row.getCell(8).setCellType(Cell.CELL_TYPE_STRING);
map.put("kpoint", row.getCell(8).getStringCellValue());
}else {
map.put("kpoint",null);
}
if(row.getCell(9)!=null){
row.getCell(9).setCellType(Cell.CELL_TYPE_STRING);
map.put("type", row.getCell(9).getStringCellValue());
}else {
map.put("type",null);
}

qstList.add(map);
}
System.out.println();

} catch (IOException e) {
e.printStackTrace();
}
return qstList;
}

//导入 .xlsx格式
public List<?> in1(){
InputOutput te=new InputOutput();
List<?> list = te.importExcel("d:\\testExcelOut.xlsx");
return list;
}
//导入 .xls格式
public List<Map> in2(String truepath){
InputOutput te=new InputOutput();
List<Map> list = te.importExcel(truepath);
return list;
}
}action中实现将excel文件上传到服务器，然后在服务器中找到该文件路径，在通过路径解析，将文件内容解析进行操作
//导入excel表信息
@RequestMapping(value="ImportExcel.action")
public void ImportExcel(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException {
System.out.println("进入到servlet");
request.setCharacterEncoding("utf-8");
//设置上传文件保存路径
String filePath =request.getSession().getServletContext().getRealPath("/") + "excle";
System.out.println(filePath);
File file = new File(filePath);
if(!file.exists()){
file.mkdir();
}

SmartUpload su = new SmartUpload();
//初始化对象
su.initialize(servletConfig, request, response);
//设置上传文件大小
su.setMaxFileSize(1024*1024*100);
//设置所有文件的大小
su.setTotalMaxFileSize(1024*1024*100);
//设置允许上传文件类型
su.setAllowedFilesList("xls");
String result = "上传成功！";
//设置禁止上传的文件类型
try {
su.setDeniedFilesList("rar,jsp,js");
//上传文件
su.upload();

int count = su.save(filePath);
System.out.println("上传成功" + count + "个文件！");
} catch (Exception e) {
result = "上传失败！";
e.printStackTrace();
}
String filenameString ="";
for(int i =0; i < su.getFiles().getCount(); i++){
com.jspsmart.upload.File tempFile = su.getFiles().getFile(i);
System.out.println("---------------------------");
System.out.println("表单当中name属性值：" + tempFile.getFieldName());
System.out.println("上传文件名：" + tempFile.getFieldName());
System.out.println("上传文件长度:" + tempFile.getSize());
System.out.println("上传文件的拓展名：" + tempFile.getFileExt());
filenameString=tempFile.getFilePathName();
System.out.println("上传文件的全名：" + tempFile.getFilePathName());
System.out.println("---------------------------");
}
StringBuffer realpath = new StringBuffer();
realpath.append(filePath).append("\\").append(filenameString);
System.out.println(realpath);
//realpath.toString().replaceAll("\\", "\\\\");
String finalpath =realpath.toString();
System.out.println(finalpath.replace("\\", "\\\\"));
//String realpath = filePath+"\"+filenameString;
/* InputOutput test1 = new InputOutput();*/
//test1.in2(finalpath.replace("\\", "\\\\"));
List<Map> list=importExcel.in2(finalpath.replace("\\", "\\\\"));
System.out.println(list);
int count=0;
List num=new ArrayList();
StringBuffer str=new StringBuffer();
List<Map> pos= sta.findAllPosition();
for (Map map : pos) {
str.append(map.get("pos"));
}
System.out.println("list:"+list.toString());
PrintWriter out =response.getWriter();
for (Map map : list) {
System.out.println("次数");
System.out.println(map.get("A")==null);
count++;
if(map.get("detail")==null||map.get("quesanswer")==null||map.get("diffculty")==null||map.get("position")==null||map.get("kpoint")==null||map.get("type")==null)
{
num.add(count);
continue;
}

System.out.println(str.toString());
System.out.println(map.get("position").toString());
System.out.println(str.toString().indexOf(map.get("position").toString()));
if
c4a8
((str.toString().indexOf(map.get("position").toString()))==-1)
{
num.add(count);
continue;
}
System.out.println("222");
if(map.get("type").equals("选择题"))
{

if(map.get("A")==null||map.get("B")==null||map.get("C")==null||map.get("D")==null)
{
num.add(count);
continue;
}

if(map.get("quesanswer").toString().length()!=1||"ABCD".indexOf(map.get("quesanswer").toString())==-1)
{
num.add(count);
continue;
}
paper.insertAll(map.get("diffculty").toString(), map.get("position").toString(), map.get("kpoint").toString(), map.get("type").toString(), map.get("A").toString(), map.get("B").toString(), map.get("C").toString(), map.get("D").toString(), map.get("detail").toString(), map.get("quesanswer").toString());
}
System.out.println("333");
if(map.get("type").equals("多选题"))
{

if(map.get("A")==null||map.get("B")==null||map.get("C")==null||map.get("D")==null)
{
num.add(count);
continue;
}
boolean rs=Pattern.compile("^[A-D]{1,4}$").matcher(map.get("quesanswer").toString()).matches();
if (!rs) {
num.add(count);
continue;
}

paper.insertAll(map.get("diffculty").toString(), map.get("position").toString(), map.get("kpoint").toString(), map.get("type").toString(), map.get("A").toString(), map.get("B").toString(), map.get("C").toString(), map.get("D").toString(), map.get("detail").toString(), map.get("quesanswer").toString());
}

if(map.get("type").equals("判断题"))
{

if(map.get("A")!=null||map.get("B")!=null||map.get("C")!=null||map.get("D")!=null)
{
num.add(count);
continue;
}

System.out.println(map.get("diffculty")+"-++++++++++++++++++-"+map.get("position"));
//String diffculty,String position,String kpoint,String type,String A,String B,String C,String D,String detail,String quesanswer
paper.insertAll(map.get("diffculty").toString(), map.get("position").toString(), map.get("kpoint").toString(), map.get("type").toString(), null, null, null, null, map.get("detail").toString(), map.get("quesanswer").toString());

}
}
JSONArray jsonArray=JSONArray.fromObject(num);
out.print(jsonArray);

}注意在serverlet中getServletContext和getservletConfig会报错
解决办法：

         1. getServletContext前面加上request.getSession()，即request.getSession().getServletContext()即可。

         2.getservletConfig则需要

@Controller
public class ShitiAction implements ServletConfigAware,ServletContextAware{

@Override
public void setServletContext(ServletContext arg0) {
this.servletContext = arg0;
}
private ServletConfig servletConfig;
@Override
public void setServletConfig(ServletConfig arg0) {
this.servletConfig = arg0;
}

}