1.opencsv官网：http://opencsv.sourceforge.net/
jar包：opencsv-2.3.jar
下载地址：http://sourceforge.net/PRojects/opencsv/files/latest/download
2.读取CSV文件
package com.szaisino.common.opencsv;import java.io.File;import java.io.FileReader;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import au.com.bytecode.opencsv.CSVReader;/** * * <b>所属模块：</b>发票处理系统.公用模块<br/> * <b>类名称：</b>ReadCSVFile<br/> * <b>类描述：</b> 读取CSV文件 <br/> * <b>版本：</b>V1.0<br/> * <b>创建人：</b><a href="mailto:han_huayi@163.com">牧羊仒</a><br/> * <b>创建时间：</b>2016年4月20日 下午5:09:27<br/> */public class ReadCSVFile { private static final String ADDRESS_FILE = "d://addresses.csv"; /** * * 读取csv中的内容 * * @return * @throws IOException * @return List<String[]> * @exception 异常描述 * @see */ public static List<String[]> readCSVFile(File file, int startRow, String characters) throws IOException{ List<String[]> strArrayList = new ArrayList<String[]>(); CSVReader reader = null; if (",".equalsIgnoreCase(characters)){ reader = new CSVReader(new FileReader(file)); } else { //带分隔符 reader = new CSVReader(new FileReader(file),characters.toCharArray()[0]); } String[] nextLine; int i = 1; while ((nextLine = reader.readNext()) != null) {// System.out.println("Name: [" + nextLine[0] + "]/nAddress: [" + nextLine[1] + "]/nEmail: [" + nextLine[2] + "]"); if (i>=startRow) strArrayList.add(nextLine); i++; } return strArrayList; } /** * * 读取csv中的内容 * Map key:csvFileFirstRow csv文件，表头标题； * key:csvFileContent csv文件，内容(除去表头内容) * * @param file csv文件对象 * @param startRow 开始行 * @param characters 分隔符 * @return * @throws IOException * @return Map<String,List<String[]>> * @exception 异常描述 * @see */ public static Map<String, List<String[]>> readCSVFileWithMap(File file, int startRow, String characters) throws IOException{ List<String[]> csvFileFirstRowArrayList = new ArrayList<String[]>(); List<String[]> strArrayList = new ArrayList<String[]>(); CSVReader reader = null; if (",".equalsIgnoreCase(characters)){ reader = new CSVReader(new FileReader(file)); } else { //带分隔符 reader = new CSVReader(new FileReader(file),characters.toCharArray()[0]); } String[] nextLine; int i = 1; while ((nextLine = reader.readNext()) != null) {// System.out.println("Name: [" + nextLine[0] + "]/nAddress: [" + nextLine[1] + "]/nEmail: [" + nextLine[2] + "]"); if (i>=startRow) strArrayList.add(nextLine); else csvFileFirstRowArrayList.add(nextLine); i++; } Map<String, List<String[]>> map = new HashMap<String, List<String[]>>(); map.put("csvFileFirstRow", csvFileFirstRowArrayList); map.put("csvFileContent", strArrayList); return map; } }3.写入CSV文件package com.szaisino.common.opencsv;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import au.com.bytecode.opencsv.CSVWriter;/** * * <b>所属模块：</b>发票处理系统.公用模块<br/> * <b>类名称：</b>WriteCSVFile<br/> * <b>类描述：</b> 写入CSV文件 <br/> * <b>版本：</b>V1.0<br/> * <b>创建人：</b><a href="mailto:han_huayi@163.com">牧羊仒</a><br/> * <b>创建时间：</b>2016年4月20日 下午5:14:30<br/> */public class WriteCSVFile { /** * * 向CSV写数据 * * @param writeFilePath 文件路径 * @param strArrayList 文件内容 * @return void * @throws IOException * @exception 异常描述 * @see */ public static void writeCSVFile(String writeFilePath, List<String[]> strArrayList, String characters) throws IOException{ //判断文件是否存在，如果存在，先删除 File file = new File(writeFilePath); if (file.exists()) file.delete(); CSVWriter writer = null; // try { if (",".equalsIgnoreCase(characters)){ //初始化CSVWriter writer = new CSVWriter(new FileWriter(file)); } else{ //初始化CSVWriter，带分隔符 writer = new CSVWriter(new FileWriter(file),characters.toCharArray()[0]); }// } catch (IOException e) { // e.printStackTrace(); // } writer.writeAll(strArrayList); // try { writer.close();// } catch (IOException e) {// e.printStackTrace();// } } /** * * 向CSV写数据 * * @param writeFilePath * @param strArrayList * @param strArrayList * @return void * @throws IOException * @exception 异常描述 * @see */ public static void writeCSVFile(String writeFilePath, List<String[]> csvFileFirstRowList, List<String[]> contentArrayList, String characters) throws IOException{ //处理反斜杠 if (!writeFilePath.endsWith("//") && !writeFilePath.endsWith("/")){ //如果不是以//结尾，则加上// writeFilePath = writeFilePath+"////"; } //文件名 String fileName = writeFilePath+new SimpleDateFormat("yyyyMMdd").format(new Date())+".csv"; //yyyyMMddHHmm //判断文件是否存在，如果存在，先删除 File file = new File(fileName); if (file.exists()) file.delete(); CSVWriter writer = null; if (",".equalsIgnoreCase(characters)){ //初始化CSVWriter writer = new CSVWriter(new FileWriter(file)); } else{ //初始化CSVWriter，带分隔符 writer = new CSVWriter(new FileWriter(file),characters.toCharArray()[0]); } //csv表头数据+表体数据 csvFileFirstRowList.addAll(contentArrayList); writer.writeAll(csvFileFirstRowList); //关闭流 writer.close(); }}导出的csv文件如下（默认是带双引号的）："手机号码","姓名","订单号","发票代码","发票号","发票日期","发票金额""000000000","牧羊仒","0121342","030012111","13244","20170217","100"CSVWriter 的构造函数有好几个，这里示例试用的是含有3个参数的构造，第一个是指定Writer(不同情况下我们可能使用不同的writer)，第二个参数是分隔符通常是分号或者逗号第三个参数即是告知CSVWriter不要使用任何的引号来引数据，默认是双引号“”
导出不带双引号的csv文件： public static void writeCSVFile(String writeFilePath, List<String[]> csvFileFirstRowList, List<String[]> contentArrayList, String characters) throws IOException{ //处理反斜杠 if (!writeFilePath.endsWith("//") && !writeFilePath.endsWith("/")){ //如果不是以//结尾，则加上// writeFilePath = writeFilePath+"////"; } //文件名 String fileName = writeFilePath+new SimpleDateFormat("yyyyMMdd").format(new Date())+".csv"; //yyyyMMddHHmm //判断文件是否存在，如果存在，先删除 File file = new File(fileName); if (file.exists()) file.delete(); //初始化CSVWriter CSVWriter writer = new CSVWriter(new FileWriter(file), ',', CSVWriter.NO_QUOTE_CHARACTER); //csv表头数据+表体数据 csvFileFirstRowList.addAll(contentArrayList); writer.writeAll(csvFileFirstRowList); //关闭流 writer.close(); }
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