Java 的 FileFilter文件過濾與readline讀行操作實例代碼。本站提示廣大學習愛好者：（Java 的 FileFilter文件過濾與readline讀行操作實例代碼）文章只能為提供參考，不一定能成為您想要的結果。以下是Java 的 FileFilter文件過濾與readline讀行操作實例代碼正文
package com.cjonline.foundation.evisa;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;
public class Test {
public static void main(String[] args) throws Exception {
//文件過濾器,文件途徑可使用D:\\pressTest\\test相對途徑,也能夠用src/test。
File[] files = new File("src").listFiles(new FileFilter() {
public boolean accept(File arg0) {
if(arg0.getName().endsWith(".txt")){//選擇txt文件
return true;
}
return false;
}
});
FileInputStream is =null; //輸出流讀取文件
BufferedReader dr =null; //讀行
for (File file : files) {
System.out.println("---------【 file name : "+ file.getName() +"】----------");
is =new FileInputStream(file);
dr=new BufferedReader(new InputStreamReader(is));
String[] strings = new String[]{"Total transferred:","Requests per second:","[ms] (mean)","Time per request:",
"Transfer rate:","Failed requests:","Write errors:"};
BigDecimal[] BigDecimals = calPress(dr);
int i=0;
for (BigDecimal BigDecimal : BigDecimals) {
System.out.println(strings[i]+" "+BigDecimal);
i++;
}
System.out.println();
}
dr.close();
is.close();
}
private static BigDecimal[] calPress(BufferedReader dr)
throws IOException {
BigDecimal[] res = new BigDecimal[]{BigDecimal.ZERO,BigDecimal.ZERO,BigDecimal.ZERO,BigDecimal.ZERO
,BigDecimal.ZERO,BigDecimal.ZERO,BigDecimal.ZERO} ;
String totalTrans;
while((totalTrans = dr.readLine()) != null){
if (totalTrans.startsWith("Total transferred:")) {
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-2]));
res[0]=res[0].add(value);
}
if (totalTrans.startsWith("Requests per second:")) {
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-3]));
res[1]=res[1].add(value);
}
if (totalTrans.endsWith("[ms] (mean)")) {
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-3]));
res[2]=res[2].add(value);
}
if (totalTrans.startsWith("Time per request:") && !totalTrans.endsWith("[ms] (mean)")) {
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-7]));
res[3]=res[3].add(value);
}
if (totalTrans.startsWith("Transfer rate:")) {
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-3]));
res[4]=res[4].add(value);
}
if(totalTrans.startsWith("Failed requests:")){
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-1]));
res[5]=res[5].add(value);
}
if(totalTrans.startsWith("Write errors:")){
String[] st = totalTrans.split(" ");
BigDecimal value = BigDecimal.valueOf(Double.valueOf(st[st.length-1]));
res[6]=res[6].add(value);
}
}
return res;
}
}
