java写CSV文件

Posted 2021-01-31 金州恶汉拉文

1.首先pom.xml引入依赖

 <dependency>
   <groupId>com.opencsv</groupId>
   <artifactId>opencsv</artifactId>
   <version>3.10</version>
</dependency>

2.要输出的实体T字段加上注解

@CsvBindByName(column = "标题名")

3.实现方法，dataList要输出的数据，finalPath输出路径包括文件名如: xxx/xxx/xxx.csv

public static void writeCSV(List<T> dataList, String finalPath) {
   try {
      Writer writer = new FileWriter(finalPath);
      writer.write(new String(new byte[] { (byte) 0xEF, (byte) 0xBB, (byte) 0xBF }));
      StatefulBeanToCsv beanToCsv = new StatefulBeanToCsvBuilder(writer).withQuotechar(CSVWriter.NO_QUOTE_CHARACTER).withSeparator(CSVWriter.DEFAULT_SEPARATOR).withEscapechar(‘\‘).build();
      beanToCsv.write(dataList);
      writer.close();
   } catch (IOException e) {
      log.error("IOException:" + e.toString());
   } catch (CsvDataTypeMismatchException e) {
      log.error("CsvDataTypeMismatchException:" + e.toString());
   } catch (CsvRequiredFieldEmptyException e) {
      log.error("CsvRequiredFieldEmptyException:" + e.toString());
   }
}