java将数据生成csv文件

1，httpRequest接口触发进程[或者可以换成其他方式触发]

/** * 出入库生成CSV文件 * @param req * @param params * @return */@RequestMapping(value = "explanCsvFileToOrder")ResponseMessage explanCsvFileToOrder(HttpServletRequest req, @RequestParam Map<String, String> params) {    TtxSession sess = getSession(req, params.customer)    ResponseMessage rsp    rsp = validate(sess, params)    if (!rsp.hasError()) {        rsp = excfSvc.explanCsvToShipAndRece(sess,params.warehouseCode)    }    return rsp}

    /**     * scheduler_SHIPANDRECE     * @param sess     * @param warehouseCode     * @return     */    ResponseMessage explanCsvToShipAndRece(TtxSession sess, String warehouseCode) {        ResponseMessage rsp = ResponseMessageFactory.success(sess, null)        try {            //读取全局大文档，找到数据执行的SQL            List invSQLS = template(sess).queryForList("select textValue from large_text where warehouseCode=‘*‘ and type=‘CSV_FILE_SQL‘ and code=‘CSV_SHIPANDRECE‘")            if (!invSQLS) {                return ResponseMessageFactory.error(sess, "未查询到单据条件SQL")            }            //找到存储路径            List filePath = template(sess).queryForList("select value from config_value where warehouseCode=? and  identifier=‘CSVFILEPATH‘", warehouseCode)//        String path = "c:/export/"            if (!filePath) {                return ResponseMessageFactory.error(sess, "未查询到存储路径")            }            //定义文件存储路径            String path = filePath[0]["value"].toString()            //定义命名格式            String fileName = "OrderData-" + LocalDateTime.now().format(dtf)            String invSql = invSQLS[0]["textValue"].toString()            //查询出来数据            List locInv = template(sess).queryForList(invSql)

            List<Object> exportData = new ArrayList<Object>()            //给csv文件添加标题            exportData.add("DHLWarehouseNo")            exportData.add("StorageNo")            exportData.add("RelatedOrderNo")            exportData.add("ActualWarehouseTime")            exportData.add("SpareColumn1")            exportData.add("SpareColumn2")            exportData.add("LoadNo")            exportData.add("InventoriesAmount")            exportData.add("MaterialExpiryDate")            exportData.add("Department")            exportData.add("MaterialState")            List<List<Object>> datalist = new ArrayList<List<Object>>()            List<Object> data            //循环添加数据主体            locInv?.each {                data = new ArrayList<Object>()                data.add(it.CODE)                data.add(it.WarehouseNo)                data.add(it.deliveryNo)                data.add(it.lastUpdated)                data.add(it.SpareColumn1)                data.add(null)                data.add(it.skuCode)                data.add(it.quantity)                data.add(it.materialExpiryDate)                data.add(it.department)                data.add(it.inventorySts)                datalist.add(data)            }

            //创建文件            File file = this.createCSVFile(exportData, datalist, path, fileName)            String fileName2 = file.getName()            System.out.println("文件名称：" + fileName2)        } catch (Throwable t) {            ExceptionManager.logException(sess, t)            return ResponseMessageFactory.error(sess, WmsMessages.MSG_GNRL_0000)        }        return rsp    }

/** * 生成CSV文件的主体方法 * @param head * @param dataList * @param outPutPath * @param filename * @return */public static File createCSVFile(List<Object> head, List<List<Object>> dataList, String outPutPath, String filename) {    File csvFile = null    BufferedWriter csvWtriter = null    try {        csvFile = new File(outPutPath + File.separator + filename + ".csv")        File parent = csvFile.getParentFile()        if (parent != null && !parent.exists()) {            parent.mkdirs()        }        csvFile.createNewFile()

        // GB2312使正确读取分隔符","        csvWtriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(                csvFile), "GB2312"), 1024)        // 写入文件头部        writeRow(head, csvWtriter)

        // 写入文件内容        for (List<Object> row : dataList) {            writeRow(row, csvWtriter)        }        csvWtriter.flush()    } catch (Exception e) {        e.printStackTrace()    } finally {        try {            csvWtriter.close()        } catch (IOException e) {            e.printStackTrace()        }    }    return csvFile}

private static void writeRow(List<Object> row, BufferedWriter csvWriter) throws IOException {    // 写入文件头部    for (Object data : row) {        StringBuffer sb = new StringBuffer()        String rowStr = sb.append("\"").append(data).append("\",").toString()        csvWriter.write(rowStr)    }    csvWriter.newLine()}

原文地址：https://www.cnblogs.com/joker331/p/10437190.html