关于java:Java-的-FileFilter文件过滤与readline读行操作实例代码

复制代码 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, 文件门路能够应用 D:\\pressTest\\test 绝对路径, 也能够用 src/test。File[] files = new File("src").listFiles(new FileFilter() {public boolean accept(File arg0) {if(arg0.getName().endsWith(".txt")){// 抉择 txt 文件
                    return true;
                }
                return false;
            }
        });
        FileInputStream is =null;    // 输出流读取文件
        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;
    }
}