fileupload 上传execl文件的一些操作

OABaseReadExeclDataAction .class

包含创建临时文件目录,基本校验，取属性值，处理乱码，基类

这里在上传文件是execl并且需要读取的话，需要把fileitem对象转换成file,处理方式是创建临时目录，用流写入到一个临时

目录中

package com.dadi.oa.web.action;

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.ServletRequestContext;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.dadi.oa.pojo.Users;
import com.dadi.oa.service.ReadExeclDataService;
import com.dadi.oa.system.ConstantsUtil;
import com.dadi.oa.util.RequestUtil;
import com.dadi.oa.util.StringUtil;
import com.dadi.oa.util.UploadUtil;

/**
 * 读取execl action基类，处理一些通用操作
 * @author ao.ouyang
 *
 */
public class OABaseReadExeclDataAction extends OABaseAction {
	private Log logger = LogFactory.getLog(this.getClass());
	protected ReadExeclDataService readExeclDataService;
	//默认读取execl的临时目录
	protected String tempReadExeclDir;
	//封装了form表单属性的集合
	protected Map<String,String> formFieldItems;
	protected File readExeclFile;
	private File tempDirectoryFile;
	
	
	public void setReadExeclDataService(ReadExeclDataService readExeclDataService) {
		this.readExeclDataService = readExeclDataService;
	}
	

	public void setTempReadExeclDir(String tempReadExeclDir) {
		this.tempReadExeclDir = tempReadExeclDir;
	}
	
	
	/**
	 * 初始化临时文件目录
	 */
	public void initDir(){
		formFieldItems = new HashMap<String, String>();
		String nativeWebAppFoldPath =((WebApplicationContext)ConstantsUtil.beanFactory).getServletContext().getRealPath("/");
		tempDirectoryFile = new File(nativeWebAppFoldPath + tempReadExeclDir);
        // 文件夹不存在就自动创建
        if (!tempDirectoryFile.isDirectory()) {
        	tempDirectoryFile.mkdirs();
        }
	}

	@Override
	protected ActionForward dispatchMethod(ActionMapping mapping,
			ActionForm form, HttpServletRequest request,
			HttpServletResponse response, String name) throws Exception {
		// TODO Auto-generated method stub
		String resultStr=processFileUpload(request);
		if(!resultStr.equalsIgnoreCase("success")){
			request.setAttribute("info",resultStr);
			request.setAttribute("closepage", "yes");
			return mapping.findForward("oapromptinfo");
		}
		return super.dispatchMethod(mapping, form, request, response, name);
	}
	
	/**
	 * 处理请求文件
	 * @param request
	 * @return
	 */
	public String processFileUpload(HttpServletRequest request) throws Exception {
		String resultStr = "success";
        try {
        	if(!FileUpload.isMultipartContent(new ServletRequestContext(request))){
    			throw new Exception("操作异常，请重新再试！！！");
    		}
    		ServletFileUpload fileUpload = UploadUtil.getFileUploadObject(10);		
    		List fileItems = null;
    		FileItem readItem = null;
    		fileItems = fileUpload.parseRequest(request);
            for (Iterator it = fileItems.iterator(); it.hasNext();) {
                FileItem item = (FileItem) it.next();
                if (!item.isFormField()) {
                	readItem = item;
                }else{
                	formFieldItems.put(item.getFieldName(),item.getString("UTF-8"));
                }
                
            }
        	 //校验文件
            checkExecl(readItem);
            try {
            	readExeclFile = new File(tempDirectoryFile.getAbsolutePath(), readItem.getName().substring(readItem.getName().lastIndexOf("\\")+1));
            	readItem.write(readExeclFile);
            	readItem.delete();
            } catch (Exception e) {
                e.printStackTrace();
                throw new Exception("文件转换异常，请检查！！！");
            }
		} catch (Exception e) {
			e.printStackTrace();
			resultStr=e.getMessage();
			logger.info("================ERROR:OABaseReadExeclDataAction.executeSub()"+e.getMessage());
		}
       return resultStr;
    }
	
	/**
	 * 校验文件
	 * @throws Exception
	 */
	private void checkExecl(FileItem readItem) throws Exception{
		logger.info("==========OABaseReadExeclDataAction.checkExecl() begin===========");
		String inputFileName = readItem.getName();
		long inputFileSize = readItem.getSize();
		if(StringUtil.isEmptyString(inputFileName)){
			throw new Exception("系统找不到文件,请确定文件路径！！！"); 
		}
		if(!(inputFileSize > 0)){
			throw new Exception("系统找不到文件或文件没有内容！！！"); 
		}
		String inputFileExtension = FilenameUtils.getExtension(inputFileName).toLowerCase();
		if("".equalsIgnoreCase(inputFileExtension)){
			throw new Exception("文件无后缀名,请选择正确的文件上传！！！");
		}
		if("xls,xlsx".indexOf(inputFileExtension)<0){
			throw new Exception("请上传execl文档格式,格式如：xls,xlxs；请选择正确的文件上传！！！");
		}
		logger.info("===========OABaseReadExeclDataAction.checkExecl() end===========");
	}
	
	
	
	
	
	
	
}