截取字符串

/**
 * Project Name:dataanalysis02
 * File Name:LogQuery.java
 * Package Name:actions
 * Date:2016-1-14上午9:26:25
 * Copyright (c) 2016, China Link Communications LTD All Rights Reserved.
 *
 */


package actions;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import demon.XmlName;

/**
 * ClassName: LogQuery <br/>
 * Date: 2016-1-14 上午9:26:25 <br/>
 * Description: TODO
 *
 * @author lieg
 * @version
 * @see
 */
public class LogQuery {
    
    public static void main(String[] args) {
        LogQuery logQuery = new LogQuery();
        String queryname = "REQUEST-XML";
        String searchPath = "/handles.log";
        List<Map<String,XmlName>> xmlList = logQuery.findLineByTimeLogAndaName(searchPath);
        System.out.println(xmlList.toString());
    }
    public List<Map<String,XmlName>> findLineByTimeLogAndaName(String serachPath) {
        XmlName xmlnamesum = new XmlName();
        BufferedReader br = null;
        Map<String,XmlName> mapqurey = new HashMap<String,XmlName>();
        String queryname = "REQUEST-XML";
        String queryname1 = "RESPONSE-XML";
        String line = "";
        int allnum = 0;
        int allnum1 = 0;
        String regexdate = ""; //时间的正则表达式
        String date ;
        int count1;
        List<Map<String,XmlName>> querynamesum = new ArrayList();
        try {
            br = new BufferedReader(new InputStreamReader(new FileInputStream(serachPath)));
            line = br.readLine();
            regexdate = "(\\d{4}-\\d{2}-\\d{2} \\d{2})"; //时间的正则表达式
            while (null != line) {
                count1 = count(line, queryname);
                if(count1 != 0)
                {
                    Pattern pattern = Pattern.compile(regexdate);
                    Matcher matcher = pattern.matcher(line);
                    while (matcher.find()) {
                        String req_service = matcher.group(1);
                    }
                }
                allnum += count(line, queryname);
                allnum1 += count(line, queryname1);
                line = br.readLine();
            }
            xmlnamesum.setNum(allnum);
            xmlnamesum.setQueryName(queryname);
            mapqurey.put("00",xmlnamesum);
            querynamesum.add(mapqurey);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
                br = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
            return querynamesum;
    }
        /**
         * 在line中查找queryname，并返回找到的个数 line 从文件读入的一行 queryname
         * 要查找的字符串 line中queryname的个数
         */
    
 // 每一行的特定字符串的记录数
    public int count(String line, String queryname) {
        int count = 0;
        int len = queryname.length();
        int fromIndex = 0;
        while ((fromIndex = line.indexOf(queryname, fromIndex) + 1) > 0) {
            count++;
        }
        return count;
    }
}