需求：通過一個手機號可以查出手機號的歸屬地，網上是可以查的，但是10萬個手機捏？當然你有1萬個員工，每人幫你查10個，也算還可以。相形見絀，運用程式幫你查分分鐘事情，接下來教大家如何用java批量查詢手機歸屬地，當然程式碼還可以繼續優化的，沒有使用多執行緒，效率有所慢一些。

思路：excel讀取——資料庫查詢手機歸屬地——excel寫出

程式碼：

File f2003 = new File(filePath);
        try {
            List<Map<String, Object>> list = new ArrayList<Map<String
 
, Object>>();
            List<List<Object>> lists = _excelUtil.readExcel(f2003);
            for(int i = 0;i<lists.size();i++){
                String result02 = insertQuestions2ForExcel(lists.get(i),paperId,questionNoNum);
                String[] result02_ = result02.split(",");
                if
 
(result02_.length == 4){
                    Map<String, Object> map = new HashMap<String, Object>();
                    map.put("CODEA", result02_[0]);
                    map.put("CODEB", result02_[1]);
                    map.put("CODEC", result02_[2]);
                    map.put("CODED"
 
, result02_[3]);
                    list.add(map);
                }
            }
            /*final List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
            List<List<Object>> lists = _excelUtil.readExcel(f2003);
            ExecutorService executorService=Executors.newFixedThreadPool(10);
            for(final List<Object> listss : lists){
                executorService.execute(new Runnable() {
                    public synchronized void run() {
                        Map<String, Object> map = null;
                        String result02 = insertQuestions2ForExcel(listss,paperId,questionNoNum);
                        String[] result02_ = result02.split(",");
                        if(result02_.length == 4){
                            map = new HashMap<String, Object>();
                            map.put("CODEA", result02_[0]);
                            map.put("CODEB", result02_[1]);
                            map.put("CODEC", result02_[2]);
                            map.put("CODED", result02_[3]);
                            list.add(map);
                        }
                    }
                }); 
                try {
                    Thread.sleep(100); 
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            executorService.shutdown();*/



            LinkedHashMap<String, String> titleMap = new LinkedHashMap<String, String>();
            titleMap.put("CODEA", "姓名");
            titleMap.put("CODEB", "手機");
            titleMap.put("CODEC", "省份");
            titleMap.put("CODED", "城市");

            FileOutputStream out = new FileOutputStream("D:/33.xls");
            try {
                _excelUtil.exportCommonExcel(null, titleMap, list, out);
            } catch (Exception e) {
                e.printStackTrace();
            }

            System.out.println("匯出成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }