Java 缓存管道流(BufferedReader)按行读取文件

输入文件

/home/jerry/304.log

POM.xml

    4.0.0

    com.geo.cn
    DASink
    1.0
    jar

    
    

    
        

            
                maven-assembly-plugin
                
                    false
                    
                        jar-with-dependencies
                    
                    
                        
                            
                            com.geo.cn.pojo.Test
                        
                    
                  
                
                    
                        make-assembly
                        package
                        
                            assembly
                        
                    
                
            
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.1
                
                    1.8
                    1.8
                    UTF-8
                
            

        
    

代码

package com.geo.cn.pojo;

import java.io.*;
public class Test {
   

    public static void main(String[] args) {
        BufferedReader bf_read = null;
        BufferedWriter bf_write = null;
        try {
            //BufferedReader bf = new BufferedReader(new FileReader(args[0]));
            bf_read = new BufferedReader(new InputStreamReader(new FileInputStream("/home/jerry/304.log")));
            bf_write = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("/home/jerry/indx304.log")));
            String str;

            try {
                while ((str = bf_read.readLine()) !=null){
                    //System.out.println("数据长度"+str.split("\t").length);
                    //System.out.println(str.split("\t"));

                    if(!"".equals(str) && null != str.split("\t",-1)[11]  && !"".equals(str.split("\t",-1)[11] )){
                        str = str.replace("消息: (null, ","");

                        //String [] res = str.split("\t",-1);
                        //System.out.println("===============  "+res[11]);
                        //System.out.println("$$$$$$$$$$$$$$$$$$$$"+str);
                        int indexFlag = str.indexOf(")");

                        str = str.substring(0,indexFlag);



                        System.out.println("----------------"+str);
                        bf_write.write(str);
                        bf_write.newLine();

                    }else{
                        System.out.println("###########  "+str);
                    }
                }

            } catch (IOException e) {
                e.printStackTrace();

            }finally {
                try {
                    bf_read.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    bf_write.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
}

打包执行

• 打包

mvn package

• 执行

(文件名)：/home/jerry/304.log 
java   -jar Test.jar    /home/jerry/304.log