文件上传方法,使用Struts2,实现Excel文件读取并写入数据库技术
如题:文件信息的批量导入……
项目中经常会遇到客户的一些单表信息的数据批量导入,也就是提供定制Excel表,再把Excel表中的数据提取到数据库的操作,其实实现起来很简单。以下是小菜鸟我的实现思路:
1、JSP页面+Struts2实现文件上传,把定制Excel上传到服务器指定目录下,以供读取;
2、POI读取Excel表格,把数据封装为持久化实体List
3、批量导入数据库
这是TT的开发环境:
Struts2.1.6 + Spring2.5.6 + Hibernate3.3.1 +MyEclipse8.5 + tomcat5.5 + Oracle11g
需要的Jar包:SSH的就不需要说了
主要就是一个POI的包:
我这里是 poi-3.7-beta-0620.jar,这一个jar包可以去apach的官网上下载
还有一个就是struts的IO包:
commons-io-1.3.2.jar,顾名思义:IO工具类
第一步:文件上传
这一步,网上有很多的例子:
JSP页面:
Struts.xml配置文件:这里可以定制Filter,指定文件类型和最大长度,就不列举了
/page/role/roleallinput.jsp
/page/role/roleallinput.jsp
对应的applicationContext.xml配置
scope=”prototype”>
class=”com.adtec.datacenter.dao.manager.FileLoadDaoImpl”>
RoleFileUploadAction实现
这里有几个点需要注意:
上传文件的文件如果为uploadFile,那么文件名一定要为uploadFileFileName,也就是在文件后加入FileName,不然不能识别
package com.adtec.datacenter.action.manager;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import mons.io.FileUtils;
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.struts2.ServletActionContext;
import com.adtec.datacenter.dao.manager.FileLoadDao;
import com.adtec.datacenter.dao.manager.RoleDao;
import com.adtec.datacenter.entity.manager.PtRoleInfo;
import com.adtec.datacenter.vo.manager.RoleInfo;
import com.opensymphony.xwork2.ActionSupport;
public class RoleFileUploadAction extends ActionSupport{
private File uploadFile;
private String uploadFileFileName;
private FileLoadDao fileLoadDao;
private RoleDao roleDao;
public File getUploadFile() {
return uploadFile;
}
public void setUploadFile(File uploadFile) {
this.uploadFile = uploadFile;
}
public String getUploadFileFileName() {
return uploadFileFileName;
}
public void setUploadFileFileName(String uploadFileFileName) {
this.uploadFileFileName = uploadFileFileName;
}
public FileLoadDao getFileLoadDao() {
return fileLoadDao;
}
public void setFileLoadDao(FileLoadDao fileLoadDao) {
this.fileLoadDao = fileLoadDao;
}
public RoleDao getRoleDao() {
return roleDao;
}
public void setRoleDao(RoleDao roleDao) {
this.roleDao = roleDao;
}
@Override
public void validate() {
super.validate();
}
public String loadRoleFile(){
String directory = “/upload/role”;
String targetDirectory = ServletActionContext.getServletContext().getRealPath(directory);
//生成上传的文件对象
File target = new File(targetDirectory,uploadFileFileName);
//如果文件已经存在,则删除原有文件
if(target.exists()){
target.delete();
}
//复制file对象,实现上传
try {
FileUtils.copyFile(uploadFile, target);
//out = response.getWriter();
//out.print(“文件上传成功!”);
} catch (IOException e) {
e.printStackTrace();
}
loadRoleInfo(uploadFileFileName);
return SUCCESS;
}
/**
* 把Excele表读出的数据,组装成一个List,统一导入数据库
* @param uploadFileFileName
*/
public void loadRoleInfo(String uploadFileFileName){
String directory = “/upload/role”;
String targetDirectory = ServletActionContext.getServletContext().getRealPath(directory);
File target = new File(targetDirectory,uploadFileFileName);
List roleList = new ArrayList();
try{
FileInputStream fi = new FileInputStream(target);
Workbook wb = new HSSFWorkbook(fi);
Sheet sheet = wb.getSheetAt(0);
int rowNum = sheet.getLastRowNum()+1;
for(int i=1;i
PtRoleInfo ptRoleInfo = new PtRoleInfo();
Row row = sheet.getRow(i);
int cellNum = row.getLastCellNum();
for(int j=0;j
Cell cell = row.getCell(j);
String cellValue = null;
switch(cell.getCellType()){ //判断excel单元格内容的格式,并对其进行转换,以便插入数据库
case 0 : cellValue = String.valueOf((int)cell.getNumericCellValue()); break;
case 1 : cellValue = cell.getStringCellValue(); break;
case 2 : cellValue = String.valueOf(cell.getDateCellValue()); break;
case 3 : cellValue = “”; break;
case 4 : cellValue = String.valueOf(cell.getBooleanCellValue()); break;
case 5 : cellValue = String.valueOf(cell.getErrorCellValue()); break;
}
switch(j){//通过列数来判断对应插如的字段
case 0 : ptRoleInfo.setRoleId(cellValue);break;
case 1 : ptRoleInfo.setRoleName(cellValue);break;
case 2 : ptRoleInfo.setDeil(cellValue);break;
}
}
roleList.add(ptRoleInfo);
}
fileLoadDao.roleInfotoDB(roleList);
}catch(IOException e){
e.printStackTrace();
}
}
}
roleDao接口实现
这里接口类就不贴出来了,直接贴实现类,把持久化实体List循环写入数据库
package com.adtec.datacenter.dao.manager;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import mons.io.FileUtils;
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.struts2.ServletActionContext;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import com.adtec.datacenter.entity.manager.PtRoleInfo;
import com.adtec.datacenter.vo.manager.RoleInfo;
/**
* 文件工具类
* @author Tony
*
*/
public class FileLoadDaoImpl extends HibernateDaoSupport implements FileLoadDao {
/**
* 把从excel表读出的数据写入到数据库
*/
public void roleInfotoDB(List roleList){
Session session = this.getHibernateTemplate().getSessionFactory().openSession();
Transaction tx = null;
try{
tx = session.beginTransaction();
if(roleList.size() > 0){
int roleNum = roleList.size();
for(int i=0;i
session.save(roleList.get(i));
}
/*for(Iterator iterator = roleList.iterator();iterator.hasNext();){
session.save(iterator.next());
}*/
}
mit();
}catch(HibernateException e){
e.printStackTrace();
tx.rollback();
}finally{
session.close();
}
//this.getHibernateTemplate().saveOrUpdateAll(roleList);
return;
}
}
/?post=276