package com;
import org.bson.types.ObjectId;
import com.mongodb.BasicDBObject;
import com.mongodb.Bytes;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.QueryOperators;
import com.mongodb.util.JSON;
public class MongodCURD {
/**
* @param args
*/
private Mongo mg = null;
private DB db;
private DBCollection users;
public static void main(String[] args) {
MongodCURD db = new MongodCURD();
db.init();
db.queryAll();
// db.add();
//db.remove("4e852356a14c1336519a321a");
//db.modify("4e8522dba14cf9d707623817");
//db.queryAll();
//db.testOthers();
db.destroy();
}
public void init()
{
try {
mg = new Mongo();
} catch (Exception e) {
e.printStackTrace();
}
db = mg.getDB("test");
users = db.getCollection("things");
}
public void destroy()
{
if(mg!=null)
{
mg.close();
mg=null;
db=null;
users=null;
System.gc();
}
}
public void queryAll()
{
print("查询所有数据");
DBCursor cur = users.find();
while(cur.hasNext())
{
print(cur.next());
}
}
public void add()
{
queryAll();
print("count:"+users.count());
DBObject user = new BasicDBObject();
user.put("name","tuping");
user.put("age", 28);
user.put("sex", "男");
print(users.save(user).getN());
}
public void modify(String Id)
{
print("修改:"+users.update(this.getDBObject("_id",getObjectId(Id)),this.getDBObject("name","吴蔚玲"),true,false).getN());
}
public void remove(String Id)
{
queryAll();
DBObject o1 = new BasicDBObject();
o1.put("_id", Id);
print("删除ID="+Id+users.remove(new BasicDBObject("_id",new ObjectId(Id))));
}
public ObjectId getObjectId(String key)
{
return new ObjectId(key);
}
public BasicDBObject getDBObject(String key,Object value)
{
return new BasicDBObject(key,value);
}
public void print(Object o)
{
System.out.println(o);
}
public void query() {
//查询所有
//queryAll();
//查询id = 4de73f7acd812d61b4626a77
print("find id = 4de73f7acd812d61b4626a77: " + users.find(new BasicDBObject("_id", new ObjectId("4de73f7acd812d61b4626a77"))).toArray());
//查询age = 24
print("find age = 24: " + users.find(new BasicDBObject("age", 24)).toArray());
//查询age >= 24
print("find age >= 24: " + users.find(new BasicDBObject("age", new BasicDBObject("$gte", 24))).toArray());
print("find age <= 24: " + users.find(new BasicDBObject("age", new BasicDBObject("$lte", 24))).toArray());
print("查询age!=25:" + users.find(new BasicDBObject("age", new BasicDBObject("$ne", 25))).toArray());
print("查询age in 25/26/27:" + users.find(new BasicDBObject("age", new BasicDBObject(QueryOperators.IN, new int[] { 25, 26, 27 }))).toArray());
print("查询age not in 25/26/27:" + users.find(new BasicDBObject("age", new BasicDBObject(QueryOperators.NIN, new int[] { 25, 26, 27 }))).toArray());
print("查询age exists 排序:" + users.find(new BasicDBObject("age", new BasicDBObject(QueryOperators.EXISTS, true))).toArray());
print("只查询age属性:" + users.find(null, new BasicDBObject("age", true)).toArray());
print("只查属性:" + users.find(null, new BasicDBObject("age", true), 0, 2).toArray());
print("只查属性:" + users.find(null, new BasicDBObject("age", true), 0, 2, Bytes.QUERYOPTION_NOTIMEOUT).toArray());
//只查询一条数据,多条去第一条
print("findOne: " + users.findOne());
print("findOne: " + users.findOne(new BasicDBObject("age", 26)));
print("findOne: " + users.findOne(new BasicDBObject("age", 26), new BasicDBObject("name", true)));
//查询修改、删除
print("findAndRemove 查询age=25的数据,并且删除: " + users.findAndRemove(new BasicDBObject("age", 25)));
//查询age=26的数据,并且修改name的值为Abc
print("findAndModify: " + users.findAndModify(new BasicDBObject("age", 26), new BasicDBObject("name", "Abc")));
print("findAndModify: " + users.findAndModify(
new BasicDBObject("age", 28), //查询age=28的数据
new BasicDBObject("name", true), //查询name属性
new BasicDBObject("age", true), //按照age排序
false, //是否删除,true表示删除
new BasicDBObject("name", "Abc"), //修改的值,将name修改成Abc
true,
true));
queryAll();
}
public void testOthers() {
DBObject user = new BasicDBObject();
user.put("name", "hoojo");
user.put("age", 24);
//JSON 对象转换
print("serialize: " + JSON.serialize(user));
//反序列化
print("parse: " + JSON.parse("{ \"name\" : \"hoojo\" , \"age\" : 24}"));
print("判断temp Collection是否存在: " + db.collectionExists("things"));
//如果不存在就创建
if (!db.collectionExists("things")) {
DBObject options = new BasicDBObject();
options.put("size", 20);
options.put("capped", 20);
options.put("max", 20);
print(db.createCollection("account", options));
}
//设置db为只读
//db.setReadOnly(true);
//只读不能写入数据
db.getCollection("things").save(user);
}
}