JAVA-导数到Mongodb (Mongodb中有List集合)

package com.MyTestMongo;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
/**
 *将数据存入MongoDB中，有一列包含List集合 
 */
public class ReadFile {
    private static DB db;
    private static Mongo mg;
    public static List<BasicDBObject> list = new ArrayList<BasicDBObject>();
    private static int num = 0;
    
    /**
     * 对找出来的每一个文件进行读取
     * @param path
     */
    public static void fileData(String path,int j){
        File file = new File(path);
        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(file));
            for(String line = new String(br.readLine().getBytes(),"utf-8");line != null;line = br.readLine()){
                num++;
                BasicDBObject basi = new BasicDBObject();
                String strs[] = line.split("    ");
                List<Object> list2 = getlists(strs);
                basi.put("_id",strs[0]);
                basi.put("p", j);
                basi.put("l", list2);
                list.add(basi);
                if(num % 100000 == 0){
                    insertbeach(list);
                    System.out.println("已导入" + num + "条数据");
                    list.clear();
                }
            }
            insertbeach(list);
            System.out.println("已导入完成!");
            list.clear();
        }catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    
    
    public static List<DBObject> list2 = new ArrayList<DBObject>();
    /**
     * 将List集合中的数据导入MongoDB
     * @param list
     */
    public static void insertbeach(List<BasicDBObject> list){
        for(int j = 0;j < list.size();j++){
            DBObject obj = list.get(j);
            list2.add(obj);
        }
        DBCollection dd = db.getCollection("zq4");
        dd.insert(list2);
        list2.clear();
    }
    
    /**
     * 链接Mongodb
     */
    public static void initMongo(){
        try {
            mg = new Mongo("localhost",27017);
            db = mg.getDB("admin");
            boolean auth = db.authenticate("root123", "test123".toCharArray());
            if(!auth){
                System.err.println("Error");
            }else{
                db = mg.getDB("zq1");
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }
    
    public static List<Object> getlists(String strs[]){
        List<Object> list = new ArrayList<Object>();
        for(int i = 1;i < strs.length;i = i + 2){
            Map<String,Object> map = new HashMap<String, Object>();
            map.put("z", strs[0]);
            map.put("n", strs[i]);
            map.put("t", Integer.parseInt(strs[i+1]));
            list.add(map);
        }
        return list;
    }
    /**
     *main函数入口 
     */
    public static void main(String args[]){
        initMongo();
        fileData("E:/aa", 1);
    }
}