java操作csv文件之javacsv.jar应用

csv文件是分隔文件，如果使用java的io流来写，比较麻烦，这里为大家提供一个javacsv的jar包，这个很方便操作csv文件。

下载地址：https://pan.baidu.com/s/1i46ErFB

那如何使用呢？

只要看看以下一个例子，您一下就明白了。

 import com.csvreader.CsvReader;
 import com.csvreader.CsvWriter;
 import org.junit.Test;

 import java.io.IOException;
 import java.nio.charset.Charset;

 /**
  * Created by javalittleman on 2016/8/18.
  */
 public class TestCVS {
     /**
      * CSV导出
      *
      * @throws Exception
      */
     @Test
     public void exportCsv() throws IOException {
         String srcCSV = "F:/cnt_programa.csv";
         String targetFile = "F:/test.csv";
         CsvReader reader = new CsvReader(srcCSV, ',', Charset.forName("UTF-8"));
         CsvWriter write =new CsvWriter(targetFile,',',Charset.forName("UTF-8"));
         //各字段以引号标记
         write.setForceQualifier(true);
         //路过表头
         //r.readHeaders();
         //逐条读取记录，直至读完
         String[] header = {};
         while (reader.readRecord()) {
             //把头保存起来
             if (reader.getCurrentRecord()==0){
                 header = reader.getValues();
             }
             //获取当前记录位置
             System.out.print(reader.getCurrentRecord() + ".");
             //读取一条记录
             System.out.println(reader.getRawRecord());
             String[] tmp = {reader.getValues()[0],reader.getValues()[1]};
             //修改记录，并只写入第一个字段和第二字段
             if (!header[1].equals(tmp[1]) && ("".equals(tmp[1])||tmp==null)){
                 tmp[1]="空";
                 write.writeRecord(tmp);
             }else{
                 write.writeRecord(new String[]{reader.getValues()[0],reader.getValues()[1]});
             }
         }
         reader.close();
         write.close();
     }
 }

cnt_programa.csv文件：

"id","pid","no","serial","name","createtime"
"100000","","No100000","","公司新闻","2016/8/23 17:12:09"
"100001","","No100001","","热点资讯","2016/8/24 17:12:36"
"100046","100001","No100046","1","银行动态","2016/8/1 10:36:31"
"100052","100001","No100052","2","法律法规","2016/8/2 20:39:10"
"100088","100001","No100088","3","专业文库","2016/8/5 19:05:47"

test.csv

"id","pid"
"100000","空"
"100001","空"
"100046","100001"
"100052","100001"
"100088","100001"