mongdb 模糊查询

客户端模糊查询语句  

db.user_base.find({ "umac" : { "$regex" : ".*Programming" , "$options" : "i"}} ).size()

Java模糊查询

/**

   * 模糊查询

   *

   * @param db

   * @param name

   */

  public static void query(DB db,String name){

    DBCollection dbColl = db.getCollection(name);

    //完全匹配

    //Pattern pattern = Pattern.compile("^name$", Pattern.CASE_INSENSITIVE);

    //右匹配

    //Pattern pattern = Pattern.compile("^.*name$", Pattern.CASE_INSENSITIVE);

    //左匹配

    //Pattern pattern = Pattern.compile("^name.*$", Pattern.CASE_INSENSITIVE);

    //模糊匹配

    Pattern pattern = Pattern.compile("^.*name8.*$", Pattern.CASE_INSENSITIVE);

    BasicDBObject query = new BasicDBObject();

    query.put("name",pattern);

    BasicDBObject sort = new BasicDBObject();

    // 1,表示正序； －1,表示倒序

    sort.put("name",1);

    DBCursor cur = dbColl.find(query).sort(sort);

    int count = 0;

    while (cur.hasNext()) {

      DBObject obj = cur.next();

      System.out.print("name=" + obj.get("name"));

      System.out.print(",email=" + obj.get("email"));

      System.out.println(",passwd=" + obj.get("passwd"));

      count ++;

    }

    System.out.println("共有： " + count + "个");

  }