package com.saicfc.pmpf.internal.manage.utils;import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;import javax.servlet.http.HttpServletResponse;import org.apache.commons.beanutils.BeanUtils;/*** 文件操作*/
public class CSVUtils {/*** 生成为CVS文件* * @param exportData 源数据List* @param map csv文件的列表头map* @param outPutPath 文件路径* @param fileName 文件名称* @return*/@SuppressWarnings("rawtypes")public static File createCSVFile(List exportData, LinkedHashMap map, String outPutPath, String fileName) {File csvFile = null;BufferedWriter csvFileOutputStream = null;try {File file = new File(outPutPath);if (!file.exists()) {file.mkdir();}// 定义文件名格式并创建csvFile = File.createTempFile(fileName, ".csv", new File(outPutPath));System.out.println("csvFile：" + csvFile);// UTF-8使正确读取分隔符","csvFileOutputStream = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(csvFile), "UTF-8"),1024);System.out.println("csvFileOutputStream：" + csvFileOutputStream);// 写入文件头部for (Iterator propertyIterator = map.entrySet().iterator(); propertyIterator.hasNext();) {java.util.Map.Entry propertyEntry = (java.util.Map.Entry) propertyIterator.next();csvFileOutputStream.write("" + (String) propertyEntry.getValue() != null ?(String) propertyEntry.getValue() : "" + "");if (propertyIterator.hasNext()) {csvFileOutputStream.write(",");}}csvFileOutputStream.newLine();// 写入文件内容for (Iterator iterator = exportData.iterator(); iterator.hasNext();) {Object row = (Object) iterator.next();for (Iterator propertyIterator = map.entrySet().iterator(); propertyIterator.hasNext();) {java.util.Map.Entry propertyEntry = (java.util.Map.Entry) propertyIterator.next();csvFileOutputStream.write((String) BeanUtils.getProperty(row, (String) propertyEntry.getKey()));if (propertyIterator.hasNext()) {csvFileOutputStream.write(",");}}if (iterator.hasNext()) {csvFileOutputStream.newLine();}}csvFileOutputStream.flush();} catch (Exception e) {e.printStackTrace();} finally {try {csvFileOutputStream.close();} catch (IOException e) {e.printStackTrace();}}return csvFile;}/*** 下载文件* * @param response* @param csvFilePath 文件路径* @param fileName 文件名称* @throws IOException*/public static void exportFile(HttpServletResponse response, String csvFilePath, String fileName)throws IOException {response.setContentType("application/csv;charset=UTF-8");response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8"));InputStream in = null;try {in = new FileInputStream(csvFilePath);int len = 0;byte[] buffer = new byte[1024];response.setCharacterEncoding("UTF-8");OutputStream out = response.getOutputStream();while ((len = in.read(buffer)) > 0) {out.write(new byte[] { (byte) 0xEF, (byte) 0xBB, (byte) 0xBF });out.write(buffer, 0, len);}} catch (FileNotFoundException e) {System.out.println(e);} finally {if (in != null) {try {in.close();} catch (Exception e) {throw new RuntimeException(e);}}}}/*** 删除该目录filePath下的所有文件* * @param filePath 文件目录路径*/public static void deleteFiles(String filePath) {File file = new File(filePath);if (file.exists()) {File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isFile()) {files[i].delete();}}}}/*** 删除单个文件* * @param filePath 文件目录路径* @param fileName 文件名称*/public static void deleteFile(String filePath, String fileName) {File file = new File(filePath);if (file.exists()) {File[] files = file.listFiles();for (int i = 0; i < files.length; i++) {if (files[i].isFile()) {if (files[i].getName().equals(fileName)) {files[i].delete();return;}}}}}/*** 测试数据* * @param args*/@SuppressWarnings({ "rawtypes", "unchecked" })public static void main(String[] args) {List exportData = new ArrayList<Map>();Map row1 = new LinkedHashMap<String, String>();row1.put("1", "11");row1.put("2", "12");row1.put("3", "13");row1.put("4", "14");exportData.add(row1);row1 = new LinkedHashMap<String, String>();row1.put("1", "21");row1.put("2", "22");row1.put("3", "23");row1.put("4", "24");exportData.add(row1);LinkedHashMap map = new LinkedHashMap();map.put("1", "第一列");map.put("2", "第二列");map.put("3", "第三列");map.put("4", "第四列");String path = "c:/export/";String fileName = "文件导出";File file = CSVUtils.createCSVFile(exportData, map, path, fileName);String fileName2 = file.getName();System.out.println("文件名称：" + fileName2);}
}

　　public static void main(String[] args) {String name = "银行退款数据";List exportData = new ArrayList();LinkedHashMap datamMap = null;for (Iterator iterator = refundList.iterator(); iterator.hasNext();) {HashMap map = (HashMap) iterator.next();datamMap = new LinkedHashMap();datamMap.put("1", map.get("merOrderId"));datamMap.put("2", DateUtil.convertDateToString("yyyyMMdd", (Date) map.get("orderTime")));BigDecimal amount = (BigDecimal) map.get("amount");String amountString = amount.divide(new BigDecimal(10)).toPlainString();datamMap.put("3", amountString);datamMap.put("4", map.get("remark") != null ? map.get("remark") : "");exportData.add(datamMap);}LinkedHashMap map = new LinkedHashMap();map.put("1", "订单号");map.put("2", "支付日期");map.put("3", "退货现金金额（整数金额 单位：分）");map.put("4", "退货原因");File file = CSVUtils.createCSVFile(exportData, map, filePath, name);// 生成CSV文件fileName = file.getName();CSVUtils.exportFile(response, filePath + fileName, fileName);// 下载生成的CSV文件}