import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class CsvUtil {
private String filename = null;
private BufferedReader bufferedreader = null;
private List list =new ArrayList();
public CsvUtil(){
}
public CsvUtil(String filename) throws IOException{
this.filename = filename;
bufferedreader = new BufferedReader(new FileReader(filename));
String stemp;
while((stemp = bufferedreader.readLine()) != null){
list.add(stemp);
}
}
public List getList() throws IOException {
return list;
}
//获得csv文件的行数
public int getRowNum(){
return list.size();
}
//获得csv文件的列数
public int getColNum(){
if(!list.toString().equals("[]")) {
if(list.get(0).toString().contains(",")) { //csv文件中，每列之间的是用','来分隔的
return list.get(0).toString().split(",").length;
}else if(list.get(0).toString().trim().length() != 0) {
return 1;
}else{
return 0;
}
}else{
return 0;
}
}
//取得指定行的值
public String getRow(int index) {
if (this.list.size() != 0) return (String) list.get(index);
else return null;
}
//取得指定列的值
public String getCol(int index){
if (this.getColNum() == 0){
return null;
}
StringBuffer scol = new StringBuffer();
String temp = null;
int colnum = this.getColNum();
if (colnum > 1){
for (Iterator it = list.iterator(); it.hasNext();) {
temp = it.next().toString();
scol = scol.append(temp.split(",")[index] + ",");
}
}else{
for (Iterator it = list.iterator(); it.hasNext();) {
temp = it.next().toString();
scol = scol.append(temp + ",");
}
}
String str=new String(scol.toString());
str = str.substring(0, str.length() - 1);
return str;
}
//取得指定行，指定列的值
public String getString(int row, int col) {
String temp = null;
int colnum = this.getColNum();
if(colnum > 1){
temp = list.get(row).toString().split(",")[col];
}else if(colnum == 1) {
temp = list.get(row).toString();
}else{
temp = null;
}
return temp;
}
public void CsvClose() throws IOException {
this.bufferedreader.close();
}
public void run(String filename) throws IOException {
CsvUtil cu = new CsvUtil(filename);
BufferedWriter writer=null;
try {
writer=new BufferedWriter(new FileWriter("d://tesst.txt",true));//true表示往文件后面写，不会覆盖原有内容
} catch (IOException e) {
e.printStackTrace();
}
for(int i=0;i<cu.getRowNum();i++){
String SSCCTag = cu.getString(i,2);//获得第i行.第一列的数据.
String SiteName = cu.getString(i,19);//获得第i行.第二列的数据.
String StationId= cu.getString(i,20);
// String SSCCTag = cu.getCol(2);//获得第i行.第一列的数据.
// String SiteName = cu.getCol(19);//获得第i行.第二列的数据.
// String StationId= cu.getCol(20);
System.out.println(SSCCTag+" "+SiteName+" "+StationId);
try {
writer.write(SSCCTag+" "+SiteName+" "+StationId);
writer.newLine();
writer.flush();
} catch (IOException e) {
e.printStackTrace();
}
// System.out.println("===SSCC Tag:"+SSCCTag);
// System.out.println("===Site Name:"+SiteName);
//System.out.println("===Station Id:"+StationId);
System.out.println(" ");
}
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
cu.CsvClose();
}
public static void main(String[] args) throws IOException {
CsvUtil test = new CsvUtil();
try
{
File path = new File("f://data");
File[] f = path.listFiles();
List l = new ArrayList();
for(int i=0;i<f.length;i++){
if(f[i].getName().endsWith(".csv"))
l.add(f[i]);
}
Iterator it = l.iterator();
while(it.hasNext()){
File ff = (File)it.next();
test.run(path.toString()+File.separator+ff.getName());
}
}
catch (Exception e)
{
}
}
} java
提取出"f://data"这部分，
好比放到path.properties文件中
path=f://data
用java.util.Properties很容易就得取到这个值 app