Java中使用opencsv读写csv文件示例

OpenCSV是一个简单的用于解析CSV文件的java类库，它封装了CSV格式文件的输出和读入，可以自动处理CSV格式中的特殊字符，最重要的是OpenCSV可以用于商业化（commercial-friendly）。具体的使用方法：

读CSV文件

1、使用Iterator方式读

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"));

String [] nextLine;

while ((nextLine = reader.readNext()) != null) {

    // nextLine[] is an array of values from the line

    System.out.println(nextLine[0] + nextLine[1] + "etc...");

}

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"));

List myEntries = reader.readAll();

1、类似于FileReader

CSVWriter writer = new CSVWriter(new FileWriter("yourfile.csv"), '\t');

// feed in your array (or convert your data to an array)

String[] entries = "first#second#third".split("#");

writer.writeNext(entries);

writer.close();

1、自定义分隔符，如使用tab为分隔符

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"), '\t');

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"), '\t', '\'');

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"), '\t', '\'', 2);

dump SQL tables

java.sql.ResultSet myResultSet = ....

writer.writeAll(myResultSet, includeHeaders);

ColumnPositionMappingStrategy strat = new ColumnPositionMappingStrategy();

strat.setType(YourOrderBean.class);

String[] columns = new String[] {"name", "orderNumber", "id"}; // the fields to bind do in your JavaBean

strat.setColumnMapping(columns);

 

CsvToBean csv = new CsvToBean();

List list = csv.parse(strat, yourReader);