csv格式导出文件

        先上传连个图片看看效果，这是界面效果dwz框架（springmvc开发）

　　

     点击导出csv效果图

　　js部分的代码（带条件查询的csv导出）：

function exportReportCsv(){
        exportAgencyProfitList1();
        }
        function exportAgencyProfitList1($pageNum,$numPerPage){
        var $valueArray={ 'CUST_ID':"${PD.CUST_ID}"==' '?'':"${PD.CUST_ID}",
                          'MYSTS':"${PD.MYSTS}"==' '?'':"${PD.MYSTS}",
                          'AGENTID':"${PD.AGENTID}"==' '?'':"${PD.AGENTID}",
                          'APPLRDAT1':"${PD.APPLRDAT1}"==' '?'':"${PD.APPLRDAT1}",
                          'APPLRDAT2':"${PD.APPLRDAT2}"==' '?'':"${PD.APPLRDAT2}"
                        };    
            window.location.href="<%=path%>/customer/exportCsv?"+jQuery.param($valueArray);
            return;
        }    

 jsp 代码（其实就是一个onclick事件）：

<li><a id="csv" class="edit" href="#" onclick="return exportReportCsv();"><span>导出CSV</span></a></li>

controller部分代码：

@RequestMapping("/customer/exportCsv")
    @ResponseBody
    public void exportCsv1(Page page,HttpServletResponse response) throws Exception{
        //map中装了两个list集合，titles:List<String>   varList ： List<PageData>
        logger.info("客户信息csv表格导出");
        pd=this.getPageData(page);
        //csv表数据
        List<Map<String, String>> exportData = null;
        exportData = customerService.findCsvAgt1(pd);
        //csv表头
        LinkedHashMap<String, String> map =customerService.findCsvTabTitle1();
         File file = CSVUtil.createCSVFile(response,exportData, map,CSVUtil.path,CSVUtil.name);//生成CSV文件保存在c:/customer/也就是CSVUtil.path下
          String fileName = file.getName();
         CSVUtil.exportFile(response, CSVUtil.path + fileName, fileName);//将c:/customer/下的文件读取成CSV文件
         CSVUtil.deleteFiles(CSVUtil.path);//删除c:/customer/下的文件,只保留界面生成文件
    }
    

interface部分代码：

/**
     * csv导出
     */
    public LinkedHashMap<String, String> findCsvTabTitle();
    /**
     * csv导出查数据
     */
    public List<Map<String, String>> findCsvAgt(PageData pd) throws Exception;
    

接口实现类代码：

/* 
     * csv导出表头
     */
    @Override//设置表头信息
    public LinkedHashMap<String, String> findCsvTabTitle1() {
        logger.info("执行服务，查询客户账户CSV表头：findCsvTabTitle");
        LinkedHashMap<String, String> map = new LinkedHashMap<>();
         map.put("1", "客户ID");
         map.put("2", "客户姓名");
         map.put("3", "账户编号");
         map.put("4", "账户类型");
         map.put("5", "货币类型");
         map.put("6", "账户余额");
         map.put("7", "账户冻结金额");
         map.put("8", "账户带清算金额");
         map.put("9", "账户状态");
         map.put("10", "账户标识");
         map.put("11", "最后一次交易日期");
         map.put("12", "最后一次交易时间");
        return map;
    }
    /* 
     * csv导出内容
     */
    @Override
    public List findCsvAgt1(PageData pd) throws Exception {
        logger.info("执行服务，查询客户账户CSV表数据：findCsvAgt1");
        List exportData = new ArrayList<Map>();
        List<PageData> dataList = (List<PageData>) dao.findForList("customerMapper.findCSVAgt1",pd);//从数据库查询数据，mybaits框架
        for (PageData pdd : dataList) {//数据库数据解析，与表头对应起来
            LinkedHashMap map = new LinkedHashMap();
            map.put("1",pdd.getString("CUST_ID"));
            map.put("2",pdd.getString("CUST_NAM") );
            map.put("3",pdd.getString("PAY_AC_NO"));
            map.put("4",pdd.getString("ACC_TYPE") );
            map.put("5",pdd.getString("CCY"));
            map.put("6",pdd.getString("ACC_BALANCE") );
            map.put("7",pdd.getString("ACC_FROZEN_AMT") );
            map.put("8",pdd.getString("ACC_CLEAR_AMT") );
            map.put("9",pdd.getString("AC_STATUS") );
            map.put("10",pdd.getString("LIST_STS_FLG") );
            map.put("11",pdd.getString("LST_TXN_DATE") );
            map.put("12",pdd.getString("LST_TXN_TIME") );
            exportData.add(map);
        }
        return exportData;
    }

sql样板：

<!-- csv导出查询========================================================-->
    <!-- 账户浏览EXCEL表格导出 -->
    <select id="findExcelAgt2" parameterType="pd" resultType="pd">
         
    select a.CUST_ID as var1,a.CUST_NAM as var2,b.PAY_AC_NO as var3,b.ACC_TYPE as var4,b.ACC_BALANCE as var5,
        CASE b.AC_STATUS 
        WHEN '0' THEN '正常'
        WHEN '1' THEN '未激活'
        WHEN '2' THEN '冻结'
        WHEN '9' THEN '已销毁'    
        ELSE NULL END var6,
        b.LST_TXN_DATE as var7
        from ARP_CUST_INFO a 
        join ARP_AC_REL  c on c.LINK_ID = a.CUST_ID
        join ARP_AC_PROFILE  b on c.PAY_AC_NO = b.PAY_AC_NO
        where 1 = 1
        
        <if test="PAY_AC_NO!=null and PAY_AC_NO!=''">
            <![CDATA[AND b.PAY_AC_NO like concat(concat('%',#{PAY_AC_NO}),'%')]]>
        </if>
        <if test="CUST_ID!=null and CUST_ID!=''">
            <![CDATA[AND a.CUST_ID like concat(concat('%',#{CUST_ID}),'%')]]>
        </if>
        <if test="AC_STATUS!=null and AC_STATUS!=''">
            <![CDATA[AND b.AC_STATUS like concat(concat('%',#{AC_STATUS}),'%')]]>
        </if>
        <if test="LST_TXN_DATE1!=null and LST_TXN_DATE1!=''">
            and to_date(b.LST_TXN_DATE,'YYYYMMDD') &gt;= to_date(#{LST_TXN_DATE1},'YYYY-MM-DD')
        </if>
        <if test="LST_TXN_DATE2!=null and LST_TXN_DATE2!=''">
            and to_date(b.LST_TXN_DATE,'YYYYMMDD') &lt;= to_date(#{LST_TXN_DATE2},'YYYY-MM-DD')
        </if>
            order by b.LST_TXN_DATE desc,b.LST_TXN_TIME desc
    </select>

工具类********这才是核心的部分：

csv导出工具类
/**
 * 
 */
package com.common.util;

/** 
 * 描述：
 * @author  GK
 * @date 创建时间：2016年7月14日 下午3:18:02 
 * @version 1.0 
*/
/**
 * @author Administrator
 *
 */ 
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;
public class CSVUtil {
    public  static final String name="customer";//生成文件的名的前缀，如customer89809808080.csv
    public  static final String path="c:/customer/";//生成csv文件的保存路径
    /**
       * 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(HttpServletResponse response,List exportData, LinkedHashMap map,String outPutPath, String fileName ) {
          response.setContentType("application/csv;charset=UTF-8");
           
        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();
            if((String) propertyEntry.getValue() != null) {
                csvFileOutputStream.write((String) propertyEntry.getValue());
            }else{
                csvFileOutputStream.write("");
            }
            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) {
          HttpServletResponse response; 
        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:/";
        String fileName = "文件导出";
//        File file = CSVUtil.createCSVFile(response,exportData, map, path, fileName);
//        String fileName2 = file.getName();
//       System.out.println("文件名称：" + fileName2);
      }
}

到此就结束啦。。。