tic void main(String[] args) throws UnknownHostException, MongoException{
Mongo connection= new Mongo("localhost", 27017);
Morphia morphia= new Morphia();
Datastore ds= morphia.createDatastore(connection, "csdn");
File dataFile= new File("D:\\www.csdn.net.txt");
FileReader fr;
Integer idx=1;
try {
fr = new FileReader(dataFile);
BufferedReader br=new BufferedReader(fr);
String currentLine= null;
try {
while((currentLine= br.readLine())!=null){
//读取操作
if (currentLine.trim().equals("")){
continue;
}
String[] record= currentLine.split("#");
if (record.length>=3){
CSDNData csdnData= new CSDNData();
csdnData.setIdx(idx);
csdnData.setUserName(record[0].trim());
csdnData.setPassword(record[1].trim());
csdnData.setEmail(record[2].trim());
Key key= ds.save(csdnData);
System.out.println("已存入:"+ key.getId() + ",文档序列:"+ idx);
}else{
System.out.println("文档序列"+ idx+ "发生错误:"+currentLine);
break;
}
idx++;
}
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
就这样运行程序，密码库中的数据就开始向MongoDB中传送了。
由于我启动MongoDB服务时使用了参数--directoryperdb，因此会在数据目录下建立csdn目录。
随着数据越来越多，MongoDB中的自动分片算法开始起作用：
[plain] view plaincopyprint C:\MongoDB\csdn>dir
Volume in drive C has no label.
Volume Serial Number is F474-EC39
Directory of C:\MongoDB\csdn
2012-02-06 14:59 .
2012-02-06 14:59 ..
2012-02-06 14:40 16,777,216 csdn.0
2012-02-06 14:40 33,554,432 csdn.1
2012-02-06 14:41 67,108,864 csdn.2
2012-02-06 14:42 134,217,728 csdn.3
2012-02-06 14:45 268,435,456 csdn.4
2012-02-06 14:49 536,608,768 csdn.5
2012-02-06 14:59 |