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

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;
    }
}