使用Javacsv.jar的jar包操作csv文件的方法

csv其实就是comma separated value的缩写。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：

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" 

以上所述是小编给大家介绍的使用javacsv.jar的jar包操作csv文件的方法，希望对大家有所帮助