Java 的 FileFilter文件过滤与readline读行操作实例代码

代码如下:

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 { //文件过滤器,文件路径可以使用D:\pressTest\test绝对路径,也可以用src/test。 File[] files = new File("src").listFiles(new FileFilter() { public boolean accept(File arg0) { if(arg0.getName().endsWith(".txt")){//选择txt文件 return true; } return false; } }); FileInputStream is =null;    //输入流读取文件 BufferedReader dr =null;    //读行 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; } }