MongoDB JAVA API插入和删除示例

]/**
* MongoDBTest
* MongoDB插入和删除数据示例
*/
package com.labci.mongodb.test;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
/**
*
* @author Bill Tu(tujiyue/iwtxokhtd)
* May 22, 2011[3:10:56 PM]
*
*/
public class MongoDBInsertDataTest {
private static final String HOST = "192.168.1.86";
private static final int PORT = 27017;
private static final String USER = "iwtxokhtd";
private static final String PASSWORD = "123456";
private static final String DB_NAME = "test";
private static final String COLLECTION = "insert_test";
private static Mongo conn=null;
private static DB myDB=null;
private static DBCollection myCollection=null;

static{
try {
conn=new Mongo(HOST,PORT);//建立数据库连接
myDB=conn.getDB(DB_NAME);//使用test数据库
boolean loginSuccess=myDB.authenticate(USER, PASSWORD.toCharArray());//用户验证
if(loginSuccess){
myCollection=myDB.getCollection(COLLECTION);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (MongoException e) {
e.printStackTrace();
}
}

/**
* 使用save()方法保存数据
* @param collection　“表”名
*/
private static void saveData(DBCollection collection){
DBObject saveData=new BasicDBObject();
saveData.put("userName", "iwtxokhtd");
saveData.put("age", "26");
saveData.put("gender", "m");

DBObject infoData=new BasicDBObject();
infoData.put("height", 16.3);
infoData.put("weight", 22);

saveData.put("info", infoData);
collection.save(saveData);
}

/**
* 使用insert()方法保存数据
* @param collection "表"名
*/
private static void insertData(DBCollection collection){
DBObject insertData=new BasicDBObject();
insertData.put("name", "pig");
insertData.put("headers", 2);
insertData.put("legs", 4);
//insert(DBObject obj)
collection.insert(insertData);

DBObject insertDataFox=new BasicDBObject();
insertDataFox.put("name", "fox");
insertDataFox.put("headers", 1);
insertDataFox.put("legs", 4);

DBObject insertDataTiger=new BasicDBObject();
insertDataTiger.put("name", "tiger");
insertDataTiger.put("headers", 1);
insertDataTiger.put("legs", 3);

List<DBObject> insertDataList=new ArrayList<DBObject>();
insertDataList.add(insertDataFox);
insertDataList.add(insertDataTiger);
//insert(List<DBObject> list)
collection.insert(insertDataList);
}

/**
* 取得查询结果集
* @param collection
* @return
*/
private static DBCursor getResult(DBCollection collection){
return collection.find();
}

/**
* 打印结果数据
* @param description　结果数据相关描述
* @param recordResult　结果集
*/
private static void printData(String description,DBCursor recordResult){
System.out.println(description);
for(Iterator<DBObject> iter=recordResult.iterator();iter.hasNext();){
System.out.println(iter.next());
}
}

/**
* @param args
*/
public static void main(String[] args) {
//插入数据前若有记录才先删除所有记录
if(myCollection.find().count()>0){
myCollection.remove(new BasicDBObject());
}
//再插入数据
saveData(myCollection);
insertData(myCollection);
//再查询数据
printData("插入数据后的所有结果记录为：",getResult(myCollection));
//再删除指定的数据
DBObject deletePig=new BasicDBObject();
deletePig.put("name", "pig");
myCollection.remove(deletePig);
printData("删除pig后的所有结果记录为：",getResult(myCollection));

}
}

]插入数据后的所有结果记录为：
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af38"} , "userName" : "iwtxokhtd" , "age" : "26" , "gender" : "m" , "info" : { "height" : 16.3 , "weight" : 22}}
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af39"} , "name" : "pig" , "headers" : 2 , "legs" : 4}
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af3a"} , "name" : "fox" , "headers" : 1 , "legs" : 4}
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af3b"} , "name" : "tiger" , "headers" : 1 , "legs" : 3}
删除pig后的所有结果记录为：
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af38"} , "userName" : "iwtxokhtd" , "age" : "26" , "gender" : "m" , "info" : { "height" : 16.3 , "weight" : 22}}
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af3a"} , "name" : "fox" , "headers" : 1 , "legs" : 4}
{ "_id" : { "$oid" : "4dd8c190b2d57bb3ba03af3b"} , "name" : "tiger" , "headers" : 1 , "legs" : 3}