有时候我们在项目中需要录入大量的数据，Excel操作

有时候我们在项目中需要录入大量的数据，Excel操作

1：首先需要在项目中导入架包：

jxl.jar，

poi-3.6-20091214.jar
poi-3.8-beta5-20111217.jar
poi-examples-3.6-20091214.jar
poi-examples-3.8-beta5-20111217.jar
poi-excelant-3.8-beta5-20111217.jar
poi-ooxml-3.6-20091214.jar
poi-ooxml-3.8-beta5-20111217.jar
poi-ooxml-schemas-3.6-20091214.jar
poi-ooxml-schemas-3.8-beta5-20111217.jar
poi-scratchpad-3.6-20091214.jar
poi-scratchpad-3.8-beta5-20111217.jar

2：需要些一个操作Excel的工具实体类

package com.fxr.po;

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

public class ExcelWorkSheet<T>{
private String  sheetName;//页
private List<T>data=new ArrayList<T>();//数据
private List<String>columns;//列

/**
* @return the sheetName
*/
public String getSheetName() {
return sheetName;
}

/**
* @param sheetName the sheetName to set
*/
public void setSheetName(String sheetName) {
this.sheetName = sheetName;
}

/**
* @return the data
*/
public List<T> getData() {
return data;
}

/**
* @param data the data to set
*/
public void setData(List<T> data) {
this.data = data;
}

/**
* @return the columns
*/
public List<String> getColumns() {
return columns;
}

/**
* @param columns the columns to set
*/
public void setColumns(List<String> columns) {
this.columns = columns;
}

}

在action中写具体的逻辑实现

package com.fxr.action;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

import com.fxr.dao.SubjectDAO;
import com.fxr.dao.SubjectDAOImpl;
import com.fxr.po.ExcelWorkSheet;
import com.fxr.po.Subject;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.xssf.usermodel.XSSFWorkbook;
import org.apache.struts2.ServletActionContext;

public class ImportExcelAction extends ActionSupport{

private File excelFile;//Excel文件
private String excelFileFileName;//文件的名字
private ExcelWorkSheet<Subject> excelWorkSheet;//页
private Workbook createWorkBook(InputStream is) throws Exception{
if(getExcelFileFileName().toLowerCase().endsWith("xls")){
return new HSSFWorkbook(is);
}
if(getExcelFileFileName().toLowerCase().endsWith("xlsx"))
{
return new XSSFWorkbook(is);
}
return null;
}

public ImportExcelAction() {

}

@Override
public String execute() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
System.out.println(request);
ServletActionContext.getRequest().setCharacterEncoding("utf-8");
Workbook workbook=createWorkBook(new FileInputStream(excelFile));
Sheet sheet=(Sheet) workbook.getSheetAt(0);
excelWorkSheet=new ExcelWorkSheet<Subject>();
excelWorkSheet.setSheetName(sheet.getSheetName());
Row firstRow=sheet.getRow(0);
Iterator<org.apache.poi.ss.usermodel.Cell>iterator=firstRow.iterator();
List<String>cellNames=new ArrayList<String>();
while(iterator.hasNext()){
cellNames.add(iterator.next().getStringCellValue());
}
excelWorkSheet.setColumns(cellNames);
for (int i = 1; i <=sheet.getLastRowNum(); i++) {
Row row=sheet.getRow(i);
Subject subject=new Subject();

subject.setSubjectTitle(row.getCell(0).getStringCellValue());
subject.setSubjectOptionA(row.getCell(1).getStringCellValue());
subject.setSubjectOptionB(row.getCell(2).getStringCellValue());
subject.setSubjectOptionC(row.getCell(3).getStringCellValue());
subject.setSubjectOptionD(row.getCell(4).getStringCellValue());
subject.setSubjectAnswer(row.getCell(5).getStringCellValue());
subject.setSubjectParse(row.getCell(6).getStringCellValue());

SubjectDAO subjectDao = new SubjectDAOImpl();

subjectDao.addSubject(subject);
excelWorkSheet.getData().add(subject);
}
return SUCCESS;
}

/**
* @return the excelFile
*/
public File getExcelFile() {
return excelFile;
}

/**
* @param excelFile the excelFile to set
*/
public void setExcelFile(File excelFile) {
this.excelFile = excelFile;
}

public ExcelWorkSheet<Subject> getExcelWorkSheet() {
return excelWorkSheet;
}

/**
* @param excelWorkSheet the excelWorkSheet to set
*/
public void setExcelWorkSheet(ExcelWorkSheet<Subject> excelWorkSheet) {
this.excelWorkSheet = excelWorkSheet;
}

/**
* @return the excelFileFileName
*/
public String getExcelFileFileName() {
return excelFileFileName;
}

/**
* @param excelFileFileName the excelFileFileName to set
*/
public void setExcelFileFileName(String excelFileFileName) {
this.excelFileFileName = excelFileFileName;
}
}

前台JSP

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib  prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>试题信息的导入</title>
<style type="text/css">
#ge{ height:20px; background-color:#AAEC79;}
</style>
</head>
<body id="ge"><center>
<h1>试题信息的导入</h1>
<s:form action="import" method="post" enctype="multipart/form-data">导入excel文件<s:file name="excelFile"/>
<s:submit value="导入"></s:submit>
</s:form>
</center></body>
</html>

插入成功的JSP

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib  prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>导入成功</title>
<style type="text/css">
#ge{ height:20px; background-color:#AAEC79;}
</style>
</head>
<body id="ge"><center>
<h1><s:property  value="excelWorkSheet.sheetName" />
</h1>
<p>
<s:iterator value="excelWorkSheet.columns">
<s:property/></s:iterator>
</p>
<table>
<s:iterator var="stu"  value="excelWorkSheet.data" >
<tr>
<td> <s:property value="#stu.subjectTitle"/></td>
<td><s:property value="#stu.subjectOptionA"/></td>
<td><s:property value="#stu.subjectOptionB"/></td>
<td><s:property value="#stu.subjectOptionC"/></td>
<td><s:property value="#stu.subjectOptionD"/></td>
<td> <s:property value="#stu.subjectAnswer"/></td>
<td> <s:property value="#stu.subjectParse"/></td>

</tr>
</s:iterator>
</table>
</center></body>
</html>