冒泡排序及Mongodb示例

aimeizi-tutorials/src/main/java/net/aimeizi/tutorials/MaoPao.java

@@ -0,0 +1,22 @@
+package net.aimeizi.tutorials;
+
+import java.util.Arrays;
+
+public class MaoPao {
+
+	public static void main(String args[]) {
+		int temp;
+		int[] s = { 23, 5, 12, 59, 78, 21, 100, 79, 66 ,200,365,420,862};
+		for(int j=1;j<=s.length;j++){
+			for(int i=0;i<s.length-1;i++){
+				if(s[i]>s[i+1]){
+					temp=s[i];
+					s[i]=s[i+1];
+					s[i+1]=temp;
+				}
+			}
+		}
+		System.out.println("最终顺序:-------------------");
+		System.out.println(Arrays.toString(s));
+	}
+}

aimeizi-tutorials/src/main/java/net/aimeizi/tutorials/Mongodb.java

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+package net.aimeizi.tutorials;
+
+
+public class Mongodb {
+	
+	private Mongo mongo;
+	private DBCollection dbCollection;
+	private DB db;
+	
+	public Mongodb() throws Exception{
+		//使用ip地址创建Mongo对象
+		mongo=new Mongo("127.0.0.1");
+		//获取orcl数据库
+		db=mongo.getDB("orcl");
+		//判断是否存在集合person
+		boolean b=db.collectionExists("person");
+		System.out.println("是否存在集合[person]:"+b);
+		dbCollection = db.getCollection("person");
+		long count=dbCollection.count();
+		System.out.println("总记录数是:"+count);
+		DBCursor cursor =dbCollection.find().skip(20).limit(20);
+		while(cursor.hasNext()){
+			System.out.println(cursor.next());
+		}
+		
+		
+	}
+	
+	
+	
+	public void list(){
+		dbCollection=db.getCollection("person");
+		BasicDBObject dbObject=new BasicDBObject();
+		dbObject.put("age", new BasicDBObject("$gt",20).append("$lt", 60));
+		DBCursor cursor = dbCollection.find(dbObject);
+		System.out.println(cursor.count());
+		while(cursor.hasNext()){
+			System.out.println(cursor.next());
+		}
+		
+	}
+	
+	
+	
+	private boolean insert(){
+		
+		dbCollection=db.getCollection("person");
+		BasicDBObject dbObject=new BasicDBObject();
+		dbObject.put("name", "zhangsan");
+		dbObject.put("age", 20);
+		WriteResult writeResult = dbCollection.save(dbObject);
+		System.out.println(writeResult.getN());
+		return false;
+	}
+	
+	private boolean delete(){
+		dbCollection=db.getCollection("person");
+		BasicDBObject dbObject=new BasicDBObject();
+		dbObject.put("name", "zhangsan");
+		WriteResult writeResult = dbCollection.remove(dbObject);
+		System.out.println(writeResult.getN());
+		return false;
+	}
+	
+	
+	private boolean update(){
+		dbCollection=db.getCollection("person");
+		BasicDBObject dbObject=new BasicDBObject();
+		dbObject.put("name", "s0020");
+		BasicDBObject dbObject2=new BasicDBObject();
+		dbObject2.put("name", "s0020");
+		dbObject2.put("age", 65);
+		WriteResult writeResult = dbCollection.update(dbCollection.findOne(dbObject), dbObject2);
+		System.out.println(writeResult.getN());
+		return false;
+	}
+	
+	
+	private Object getOne(){
+		dbCollection=db.getCollection("person");
+		BasicDBObject dbObject=new BasicDBObject();
+		dbObject.put("name", "s0020");
+		//dbObject.put("age", 65);
+		DBObject object=dbCollection.findOne(dbObject);
+		System.out.println(object.toMap().get("name")+"\t"+object.toMap().get("age"));
+		return object;
+	}
+	
+	
+	public static void main(String[] args) throws Exception{
+		Mongodb mongodb=new Mongodb();
+		//mongodb.insert();
+		//mongodb.getOne();
+		//mongodb.update();
+		//mongodb.delete();
+		//mongodb.list();
+	}
+}