package com.zf.test;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test5  {

    public static void parser() throws Exception{
        Map<String , List<String>> map = new LinkedHashMap<String, List<String>>();
        Map<String, String[]> result = new LinkedHashMap<String, String[] >();
        File file = new File("E:\\360data\\重要数据\\桌面\\input.txt");
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
        String line = null;
        Pattern p1 = Pattern.compile("^(\\d+)*+");
        Pattern p2 = Pattern.compile("\\[.+?\\]");
        Pattern p3 = Pattern.compile("\\d+");
        while((line = br.readLine()) != null){
            Matcher m1 = p1.matcher(line);
            Matcher m2 = p2.matcher(line);
            String tmp = null;
            if(m1.find()){
                tmp = m1.group(1);
                if(!map.containsKey(tmp))
                    map.put(tmp, new LinkedList<String>() );
            }
            if(m2.find()){
                String str = m2.group();
                Matcher m3 = p3.matcher(str);
                while(m3.find()){
                    map.get(tmp).add(m3.group());
                }
            }
        }
        
        //去掉单个元素
        Set<String> keySet = map.keySet();
        for (String key : keySet) {
            List<String> val = map.get(key);
            for (int i = val.size() - 1; i >= 0 ; i--) {
                String s = val.remove(i);
                if(val.contains(s)){
                    val.add(s);
                }
            }
        }
        //去掉重复元素 ,得到结果集
        Set<String> ks = map.keySet();
        for (String key : ks) {
            List<String> val = map.get(key);
            HashSet<String> set = new HashSet<String>(val);
            String arr[] =  set.toArray(new String[set.size()]); 
            Arrays.sort(arr);    //排序
            result.put(key, arr);  
        }
        
        //写入文件
        File outFile = new File("E:\\360data\\重要数据\\桌面\\output.txt");
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile)));
        Set<Entry<String, String[]>> set = result.entrySet(); 
        for (Entry<String, String[]> entry : set) { 
            if(entry.getValue().length > 0){
                bw.write(entry.getKey() + " " + Arrays.toString(entry.getValue()) + "\r\n");
            }
        }
        bw.flush() ; bw.close();
    }

    public static void main(String[] args) throws Exception {
        parser();
        System.out.println("OK");
    }
}

------解决方案--------------------

http://topic.csdn.net/u/20120624/21/9357067a-552c-4200-a16c-f0924f4b2da6.html