读取text文本工具类

package com.avic.custom.controller.us.st;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import com.alibaba.fastjson.JSON;

/**
 * 读取text文本工具类
 *
 */
public class ReadTextUtils{
   /**
    * 读取text文件内容
    * 一行一行进行读取操作
    * @param filePath 文件路径
    * @return List 每一行的日志记录
    */
   public static List readTextToList(String filePath){
	   List lists=new ArrayList();
	   try {
			File file=new File(filePath);
			BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
			BufferedReader buf=new BufferedReader(new BufferedReader(new InputStreamReader(bis,"utf-8"),5*1024*1024));
			String s = null;
			while ((s=buf.readLine())!=null) {
				 if(s!=null){ 
					 //取出日志文件里json字符串
					 s=s.substring(s.indexOf("{\""), s.lastIndexOf("}")+1);
					 lists.add(s);
				 }
			}
			buf.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	   return lists;
   }
   
   public static void main(String[] args) {
	   List readTextToList = ReadTextUtils.readTextToList("D:/logs/app.log");
	   for (String string : readTextToList) {
		System.out.println(string);
	   }
	   System.out.println("集合长度"+readTextToList.size());
  }
}

app.log日志文件

14:07:15.949 [qtp2027897550-46] INFO  com.avic.custom.controller.us.st.OperationLogController - {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:08:55,830] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:09:12,787] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:09:17,508] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
14:11:06.418 [qtp1269291543-46] INFO  com.avic.custom.controller.us.st.OperationLogController - {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:13:29,117] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:13:35,281] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:16:17,442] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:18:56,604] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:19:46,539] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:87)] [2017-04-27 14:20:16,863] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:30:16,203] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":6,"deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:31:25,998] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":6,"deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:31:56,531] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:32:35,393] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:33:29,995] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
[com.avic.custom.controller.us.st.OperationLogController.operationLog(OperationLogController.java:88)] [2017-04-27 14:34:21,177] : {"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}

运行结果：

{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":6,"deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":6,"deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","userId":"6","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
{"operationJsp":"点赞页面","operation":67,"deviceSystem":1013333,"IP":"127.0.0.1","operationTime":"2016-03-07 20:20:30","deviceModel":"iPhone6s","device":"15dfab3fe6e396b0f2e5","operationRemark":"为商品520点赞了","network":"5G","operator":"注册","city":"北京朝阳区"}
集合长度17