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"