Java操作MongoDB數(shù)據(jù)庫(kù)方法詳解

Mongo mg = new Mongo();//默認(rèn)連本機(jī)127.0.0.1 端口為27017

Mongo mg = new Mongo(ip);//可以指定ip 端口默認(rèn)為27017

Mongo mg = new Mongo(ip,port);//也可以指定ip及端口

//ip為主機(jī)ip地址，port為端口號(hào)，dataBaseName相當(dāng)于數(shù)據(jù)庫(kù)名

DBAddress left = new DBAddress("ip:port/dataBaseName");

DBAddress right = new DBAddress("ip:port/dataBaseName ");

//若一個(gè)mongodb出現(xiàn)問(wèn)題，會(huì)自動(dòng)連另外一臺(tái)

Mongo mongo = new Mongo(left, right);

ListServerAddress> mongoHostList = new ArrayListServerAddress>();

mongoHostList.add(new ServerAddress("ip",port));

mongoHostList.add(new ServerAddress("ip",port));

mongoHostList.add(new ServerAddress("ip",port));

Mongo mg = new Mongo(mongoHostList);

//dataBaseName相當(dāng)于關(guān)系數(shù)據(jù)庫(kù)里的數(shù)據(jù)庫(kù)名，mongodb中若沒(méi)有該

//數(shù)據(jù)庫(kù)名也不會(huì)報(bào)錯(cuò)，默認(rèn)mongodb會(huì)建立這個(gè)數(shù)據(jù)庫(kù)名，為空。

DB db = mg.getDB(dataBaseName);

//安全認(rèn)證java代碼 返回true表示通過(guò)，false表示沒(méi)通過(guò)不能進(jìn)行操作

db.authenticate("userName", "password".toCharArray());

if(db.authenticate("admin", "123".toCharArray())){

  System.out.println("連接mongodb成功...");

} else{

  System.out.println("連接mongodb失敗...");

}

//參數(shù)tableName相當(dāng)于關(guān)系數(shù)據(jù)庫(kù)里的表名,
//若mongodb中沒(méi)有該tableName，默認(rèn)會(huì)創(chuàng)建該tableName,為空
DBCollection users = db.getCollection(tableName);
//列出庫(kù)的集合列表，相對(duì)于表對(duì)象
SetString> colls = db.getCollectionNames();
for(String s : colls){
}
// 獲取單個(gè)集合
DBCollection con = db.getCollection("users");

public class Tools {
/**
 * 實(shí)現(xiàn)mongodb主鍵自增長(zhǎng)的功能
 * @param users
 * @param tableName
 * @return
 */
public static long getNext(DBCollection users,String tableName){
long incId = 0;
try {
 DBObject ret = users.findAndModify(
 new BasicDBObject("_id", tableName), null, null, false,
 new BasicDBObject("$inc", new BasicDBObject("next", 1)),
 true, true);
 incId = Long.valueOf(ret.get("next").toString());
} catch (Exception e) {
 e.printStackTrace();
}
 return incId;
}
}

DB db = m.getDB("testdb");
DBCollection con = db.getCollection("users");
//普通添加
BasicDBObject doc = new BasicDBObject();
doc.put("name", "MongoDB");
doc.put("type", "database");
doc.put("count", 1);
BasicDBObject info = new BasicDBObject();
info.put("x", 203);
info.put("y", 102);
doc.put("info", info);
con.insert(doc); //插入對(duì)象
//特殊添加
// 添加多個(gè)特殊數(shù)據(jù)(模式自由)
for(int i = 1; i =20; i++){
con.insert(new BasicDBObject().append("i", i));
}

DBObject user_json = (DBObject)JSON.parse("{'user':[{'name':'AAA', 'age':'18'},{'name':'BBB', 'age':'19'}]}");
con.insert(user_json);
//添加JAVA對(duì)象
// 添加java對(duì)象，對(duì)象要序列化Serializable接口
UserInfo userinfo = new UserInfo("用戶(hù)甲AA", 1);
User user = new User(1, "123", userinfo);
ByteArrayOutputStream os = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(os); 
out.writeObject(user);
os.close(); out.close();
con.insert(MonGoUtil.insertObject("user_info",os.toByteArray()));

ListUserInfo> list = new ArrayListUserInfo>();
list.add(new UserInfo("List1", 1));
list.add(new UserInfo("List2", 2));
list.add(new UserInfo("List3", 3));
ByteArrayOutputStream os = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(os); 
out.writeObject(list);
os.close(); out.close();
con.insert(MonGoUtil.insertObject("lists",os.toByteArray()));

/** 輸出獲取到的文檔 **/

public static void showDBCursor(DBCursor cur){

 while(cur.hasNext()){

 System.out.println(cur.next());

 }

 System.out.println();

}

//查詢(xún)_id為30000 返回cust_Id的值 ，mongodb查詢(xún)都會(huì)返回主鍵的值

System.out.println(users.findOne(new BasicDBObject("_id",30000),new BasicDBObject("cust_Id",true)));

findAndRemove() 查詢(xún)_id=30000的數(shù)據(jù)，并且刪除

users.findAndRemove(new BasicDBObject("_id", 30000));

findAndModify介紹

users.findAndModify(

    new BasicDBObject("_id", 28), //查詢(xún)_id=28的數(shù)據(jù)

    new BasicDBObject("cust_Id", true), //查詢(xún)cust_Id屬性

    new BasicDBObject("notice_Id", true), //按照notice_Id排序

    false, //查詢(xún)到的記錄是否刪除，true表示刪除

    new BasicDBObject("province_Id", "100"), //將province_id的值改為100

    true, //是否返回新記錄 true返回，false不返回

    true //如果沒(méi)有查詢(xún)到該數(shù)據(jù)是否插collection true入庫(kù)，false不入

));

//列出所有文檔

BasicDBObject query = new BasicDBObject();

System.out.println("列出"+ con.getName() +"集合(表)的所有文檔...");

showDBCursor(con.find());

String key = "user_info";

BasicDBObject query = new BasicDBObject();

query.put(key, new BasicDBObject("$exists", true));

byte[] b = (byte[])con.findOne(query).get(key);

InputStream inputStream = new ByteArrayInputStream(b);

ObjectInputStream in = new ObjectInputStream(inputStream); 

User users = (User) in.readObject();

System.out.println("用戶(hù)對(duì)象_json：" + JSONArray.fromObject(users));

BasicDBObject query = new BasicDBObject();

query.put("i", 11);

showDBCursor(con.find(query));

BasicDBObject query = new BasicDBObject();

query.put("name", "MongoDB");

showDBCursor(con.find(query));

BasicDBObject query = new BasicDBObject();

query.put("name", new BasicDBObject("$ne", "MongoDB"));

showDBCursor(con.find(query));

System.out.println("查詢(xún)有'type'字段的數(shù)據(jù)..."); // false表示沒(méi)有

BasicDBObject query = new BasicDBObject();

query.put("type", new BasicDBObject("$exists", true)); // false

showDBCursor(con.find(query));

System.out.println("單字段and條件的使用，i>=2 and i5 ，i:[2,5)...");

BasicDBObject query = new BasicDBObject();

query.put("i", new BasicDBObject("$gte", 2).append("$lt", 5));

showDBCursor(con.find(query));

BasicDBObject query = new BasicDBObject();();

query.put("name", "MongoDB");

query.put("type", "database");

System.out.println(con.findOne(query));

showDBCursor(con.find(query));

System.out.println("單字段or條件的使用，i2 or i>=18...");

BasicDBList values = new BasicDBList(); 

values.add(new BasicDBObject("i", new BasicDBObject("$gte", 18))); 

values.add(new BasicDBObject("i", new BasicDBObject("$lt", 2)));

BasicDBObject query = new BasicDBObject();();

query.put("$or", values);

showDBCursor(con.find(query));

// "多字段or條件的使用，name:'MongoDB' or x:'203'..."

BasicDBList values = new BasicDBList(); ();

values.add(new BasicDBObject("name", "MongoDB")); 

values.add(new BasicDBObject("x", 203));

BasicDBObject query = new BasicDBObject();();

query.put("$or", values);

showDBCursor(con.find(query));

System.out.println("in條件的使用$in...");

BasicDBList values = new BasicDBList(); ();

for (int i = 1; i =10; i++) {

 values.add(i);

}

BasicDBObject query = new BasicDBObject();();

query.put("i", new BasicDBObject("$in", values));

showDBCursor(con.find(query));

System.out.println("排序[1=asc，-1=desc]...");

showDBCursor(con.find(query).sort(new BasicDBObject("i", -1)));

// "分頁(yè)查詢(xún)的使用，總數(shù)據(jù)量："+con.find(query).count()

con.find(query).limit(1); // 只取第1條數(shù)據(jù)

con.find(query).skip(1).limit(1); // 從1開(kāi)始取1條數(shù)據(jù)，下標(biāo)從0開(kāi)始

con.find(query).sort(new BasicDBObject("i", -1)).skip(0).limit(5); // DESC后取5條數(shù)據(jù)

//findAndRemove()方法，刪除查詢(xún)到的數(shù)據(jù)，刪除后的結(jié)果集

con.findAndRemove(new BasicDBObject("i", 1));

showDBCursor(con.find(query));

con.findAndRemove(new BasicDBObject("i", new BasicDBObject("$in",  values))); //【注意：多個(gè)數(shù)值無(wú)效】

showDBCursor(con.find(query));

System.out.println("not，not in條件的使用$not");

BasicDBObject query = new BasicDBObject();();

query.put("i", new BasicDBObject("$not", new BasicDBObject("$in", values)));

showDBCursor(con.find(query));

System.out.println("like查詢(xún)的使用...");

BasicDBObject query = new BasicDBObject();();

query.put("type", MonGoUtil.getLikeStr("a"));

showDBCursor(con.find(query));

System.out.println("根據(jù)數(shù)據(jù)類(lèi)型查詢(xún)，字符類(lèi)型...");

BasicDBObject query = new BasicDBObject();();

query.put("name", new BasicDBObject("$type", 2)); //字節(jié)

showDBCursor(con.find(query));

System.out.println("根據(jù)數(shù)據(jù)類(lèi)型查詢(xún)，整型...");

BasicDBObject query = new BasicDBObject();();

query.put("i", new BasicDBObject("$type", 16));

showDBCursor(con.find(query));

//"查詢(xún)數(shù)據(jù)的部分字段，1表示只返回本字段，0表示返回除此字段之外的字段"

con.find(new BasicDBObject("name", MonGoUtil.getLikeStr("b")), new BasicDBObject("name", 1));

//查詢(xún)id為300的記錄，將cust_Id的值更新為6533615，一定要注意大小寫(xiě)，以及數(shù)據(jù)//類(lèi)型，返回值為int表示所影響的記錄條數(shù)

//可以用users.findOne(new BasicDBObject("_id",300));查看下，會(huì)發(fā)現(xiàn)這條記錄//只返回兩個(gè)字段了，分別為_(kāi)id,cust_Id，別的字段都刪除了。

users.update(new BasicDBObject("_id",300), new BasicDBObject ("cust_Id","6533615")).getN();

// 參數(shù)3表示數(shù)據(jù)庫(kù)不存在是否添加(默認(rèn)false)，參數(shù)4表示是否多條修改(false只修改1條)

con.update(new BasicDBObject("name", "MongoDB"),

new BasicDBObject("$set", new BasicDBObject("type", "修改后的type"))).getN();

con.update(new BasicDBObject("name", "MongoDBs"),

new BasicDBObject("$set", new BasicDBObject("type", "修改后的type")), true, true).getN();

/移除cust_Id為6533615的數(shù)據(jù)。注意 用remove方法不釋放磁盤(pán)空間，

//mongodb只在collection中做了標(biāo)志，沒(méi)有正在刪除。

users.remove(new BasicDBObject("cust_Id","6533615")).getN();

//移除id>=1的數(shù)據(jù)

users.remove(newBasicDBObject("_id",new BasicDBObject("$gte",1))).getN();

//移除整個(gè)collection，drop也不釋放磁盤(pán)空間

users.drop();

// 根據(jù)條件刪除文檔（數(shù)據(jù)）

BasicDBList rls = new BasicDBList();

for (int i = 11; i = 20; i++) {

 rls.add(i);

}

query.put("i", new BasicDBObject("$in", rls));

con.remove(query);

 Binary binary = (Binary) doc.get("Data");

 byte[] data=binary.getData();