Question

JAVA导入txt、CSV的例子

Answer 1

导入文件若为二进制格式的csv或xls文件需要用jxl.jar包来解析，若文件为文本格式逗号分隔的csv文件则需要用opencsv.jar包来解析。下面为导入两种格式文件的代码示例：1. 导入文本格式逗号分隔的csv文件Java代码 import au.com.bytecode.opencsv.CSVReader; import au.com.bytecode.opencsv.CSVReader; Java代码 public void importCsvFile() { CSVReader csvReader = null; try { csvReader = new CSVReader(new FileReader(importFile),',');//importFile为要导入的文本格式逗号分隔的csv文件，提供getXX/setXX方法 if(csvReader != null){ //first row is title, so past csvReader.readNext(); String[] csvRow = null;//row while ((csvRow = csvReader.readNext()) != null){ for (int i =0; i<csvRow.length; i++){ String temp = csvRow[i]; switch (i) { case 0: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanName(temp); } break; case 1: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanEmail(temp); } break; default: break; } } //保存linkman到数据库 if(linkman.getLinkmanName() != null && linkman.getLinkmanEmail() != null){ EmailLinkmanAPI.insertLinkman(linkman); } } } } catch (Exception e) { e.printStackTrace(); } } public void importCsvFile() { CSVReader csvReader = null; try { csvReader = new CSVReader(new FileReader(importFile),',');//importFile为要导入的文本格式逗号分隔的csv文件，提供getXX/setXX方法 if(csvReader != null){ //first row is title, so past csvReader.readNext(); String[] csvRow = null;//row while ((csvRow = csvReader.readNext()) != null){ for (int i =0; i<csvRow.length; i++){ String temp = csvRow[i]; switch (i) { case 0: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanName(temp); } break; case 1: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanEmail(temp); } break; default: break; } } //保存linkman到数据库 if(linkman.getLinkmanName() != null && linkman.getLinkmanEmail() != null){ EmailLinkmanAPI.insertLinkman(linkman); } } } } catch (Exception e) { e.printStackTrace(); } } 2. 二进制格式的csv或xls文件Java代码 import jxl.Sheet; import jxl.Workbook; import jxl.Sheet; import jxl.Workbook; Java代码 public void importXlsFile() { Workbook book = null; try { book = Workbook.getWorkbook(importFile);//importFile为要导入的xls文件，或二进制的csv文件，提供getXX/setXX方法 } catch (Exception e) { e.printStackTrace(); } if(book != null){ int sheetNo = book.getNumberOfSheets(); for(int i = 0; i < sheetNo; i++){ Sheet sheet=book.getSheet(i); int rowNum = sheet.getRows(); int colNum = sheet.getColumns(); //first row is title, so past for(int r = 1; r < rowNum; r++){//行 for(int c = 0; c < colNum;c++){//列 String temp = sheet.getCell(c,r).getContents(); switch (c) { case 0: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanName(temp); } break; case 1: if(StringUtils.isNotEmpty(temp)){ linkman.setLinkmanEmail(temp); } break; default: break; } } //保存linkman到数据库 if(linkman.getLinkmanName() != null && linkman.getLinkmanEmail() != null){ EmailLinkmanAPI.insertLinkman(linkman); } } } } }