Contents of page >
- 1) Program to Save (Insert) image in mongoDb in java, Retrieve image, Display it and save it in local hard disk (E:\ drive)
- 2) Program to Delete Image From MongoDb in java >
1) Program to
- Save image (Insert) in MongoDb in java
- Retrieve image (Fetch) and Display retrieved image document in MongoDb in java
- Save retrieved image into local hard disk (E:\ drive)
package imageMongoDB;
/**
* Write a program to >
* - Save image in MongoDb in java
* - Retrieve image and Display retrieved image document in MongoDb in java
* - Save retrieved image into local hard disk (E:\ drive)
*/
import java.io.File;
import java.util.List;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;
public class SaveDisplayRetriveImageInMongoDb {
public static void main(String[] args) throws Exception {
/* Connect to MongoDB */
MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://localhost:27017"));
/* Connect to DATABASE */
//If in case database doesn't exists, it will be created at runtime
DB db = mongoClient.getDB("mydb");
/* Get the COLLECTION (TABLE) */
//If in case collection (Table) doesn't exists, it will be created at runtime
DBCollection dbCollection = db.getCollection("ImageCollection");
/* Step 1- Create imageFile */
System.out.println("Step 1- Create imageFile");
File imageFile = new File("E:/tiger.jpg");
/* Step 2- create gridFS object */
System.out.println("Step 2- create gridFS object");
GridFS gridFS = new GridFS(db);
/* Step 3- Create GridFSInputFile object from imageFile */
System.out.println("Step 3- Create GridFSInputFile object from imageFile");
GridFSInputFile gridFSInputFile = gridFS.createFile(imageFile);
/* Step 4- Set name for image in MongoDB */
System.out.println("Step 4- Set name for image in MongoDB");
gridFSInputFile.setFilename("tiger.jpg");
/** Step 5- Save image in collection in MongoDB */
System.out.println("\nStep 5- Save image in collection in MongoDB");
gridFSInputFile.save();
/** Step 6- Display Image document stored in collection in MongoDB */
System.out.println("\nStep 6- Display Image document stored in collection in MongoDB");
DBCursor cursor = gridFS.getFileList();
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
/** Step 7- Retrieve image from collection in MongoDB */
System.out.println("\nStep 7- Retrieve image from collection in MongoDB");
List<GridFSDBFile> imageForOutput = gridFS.find("tiger.jpg");
/** Step 8- Save retrieved image into local hard disk drive E:\drive*/
System.out.println("\nStep 8- Save retrieved image into local drive (E: drive) ");
imageForOutput.get(0).writeTo("E:/tiperImageDOWNLOADEDfromMongoDB.jpg");
System.out.println("retrieved image saved in E:/tiperImageDOWNLOADEDfromMongoDB.jpg");
}
}
/* OUTPUT
Step 1- Create imageFile
Step 2- create gridFS object
Step 3- Create GridFSInputFile object from imageFile
Step 4- Set name for image in MongoDB
Step 5- Save image in collection in MongoDB
Step 6- Display Image document stored in collection in MongoDB
{ "filename" : "tiger.jpg" , "aliases" : null , "chunkSize" : 261120 , "uploadDate" : { "$date" : "2016-12-23T11:15:34.128Z"} , "length" : 13008 , "_id" : { "$oid" : "585d0756e1bb4d38204dd6ab"} , "contentType" : null , "md5" : "5238c0366ae26e896c0851390ad7dce8"}
Step 7- Retrieve image from collection in MongoDB
Step 8- Save retrieved image into local drive (E: drive)
retrieved image saved in E:/tiperImageDOWNLOADEDfromMongoDB.jpg
*/
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2) Program to Delete Image From MongoDb in java >
package imageMongoDB;
/**
* Write a program to Delete Image From MongoDb in java
*/
import java.io.File;
import java.util.List;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;
public class DeleteImageFromMongoDb {
public static void main(String[] args) throws Exception {
/* Connect to MongoDB */
MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://localhost:27017"));
/* Connect to DATABASE */
//If in case database doesn't exists, it will be created at runtime
DB db = mongoClient.getDB("mydb");
/* Get the COLLECTION (TABLE) */
//If in case collection (Table) doesn't exists, it will be created at runtime
DBCollection dbCollection = db.getCollection("ImageCollection");
/* Step 1- Create imageFile */
System.out.println("Step 1- Create imageFile");
File imageFile = new File("E:/tiger.jpg");
/* Step 2- create gridFS object */
System.out.println("Step 2- create gridFS object");
GridFS gridFS = new GridFS(db);
/* Step 3- Create GridFSInputFile object from imageFile */
System.out.println("Step 3- Create GridFSInputFile object from imageFile");
GridFSInputFile gridFSInputFile = gridFS.createFile(imageFile);
/* Step 4- Set name for image in MongoDB */
System.out.println("Step 4- Set name for image in MongoDB");
gridFSInputFile.setFilename("tiger.jpg");
/* Step 5- Save image in collection in MongoDB */
System.out.println("Step 5- Save image in collection in MongoDB");
gridFSInputFile.save();
/* Step 6- Display Image stored in collection in MongoDB */
System.out.println("Step 6- Display Image stored in collection in MongoDB");
DBCursor cursor = gridFS.getFileList();
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
/* Step 7- Retrieve image from collection in MongoDB */
System.out.println("Step 7- Retrieve image from collection in MongoDB");
List<GridFSDBFile> imageForOutput = gridFS.find("tiger.jpg");
/** Step 8- Delete/Remove the image from collection in MongoDB */
System.out.println("\nStep 8- Delete/Remove the image from collection in MongoDB");
gridFS.remove(imageForOutput.get(0));
}
}
/* OUTPUT
Step 1- Create imageFile
Step 2- create gridFS object
Step 3- Create GridFSInputFile object from imageFile
Step 4- Set name for image in MongoDB
Step 5- Save image in collection in MongoDB
Step 6- Display Image stored in collection in MongoDB
{ "filename" : "tiger.jpg" , "aliases" : null , "chunkSize" : 261120 , "uploadDate" : { "$date" : "2016-12-23T11:17:47.102Z"} , "length" : 13008 , "_id" : { "$oid" : "585d07dbe1bb4d3f2c5bc59b"} , "contentType" : null , "md5" : "5238c0366ae26e896c0851390ad7dce8"}
Step 7- Retrieve image from collection in MongoDB
Step 8- Delete/Remove the image from collection in MongoDB
*/
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Summary -
So in this MongoDB tutorial we learned with example and program to
Save image in mongoDb in java, Retrieve image, Display it and save it in local hard disk.
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