如何使用java在mongoDB中插入图像？
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How to insert images in mongoDB using java?
提问by
I want to store image documents in MongoDB. I am using java.
我想在 MongoDB 中存储图像文档。我正在使用Java。
Any links or suggestions would be appreciated.
任何链接或建议将不胜感激。
采纳答案by Edward83
For storing binary data like images you can use GridFSor implement your own realization; Download the driverand look at src/test/com/mongodb/gridfs/GridFSTest.java;)
为了存储像图像这样的二进制数据，您可以使用GridFS或实现您自己的实现；下载驱动看看src/test/com/mongodb/gridfs/GridFSTest.java;)
Edit: you are lucky today! I made complete code for you;) Enjoy!
编辑：你今天很幸运！我为你制作了完整的代码；) 享受吧！
package mongodb.testing.java;
import com.mongodb.*;
import com.mongodb.gridfs.*;
import java.io.*;
public class Main {
public static byte[] LoadImage(String filePath) throws Exception {
File file = new File(filePath);
int size = (int)file.length();
byte[] buffer = new byte[size];
FileInputStream in = new FileInputStream(file);
in.read(buffer);
in.close();
return buffer;
}
public static void main(String[] args) throws Exception {
//Load our image
byte[] imageBytes = LoadImage("C:/Temp/bear.bmp");
//Connect to database
Mongo mongo = new Mongo( "127.0.0.1" );
String dbName = "GridFSTestJava";
DB db = mongo.getDB( dbName );
//Create GridFS object
GridFS fs = new GridFS( db );
//Save image into database
GridFSInputFile in = fs.createFile( imageBytes );
in.save();
//Find saved image
GridFSDBFile out = fs.findOne( new BasicDBObject( "_id" , in.getId() ) );
//Save loaded image from database into new image file
FileOutputStream outputImage = new FileOutputStream("C:/Temp/bearCopy.bmp");
out.writeTo( outputImage );
outputImage.close();
}
}
回答by theTuxRacer
Well, AFAIK, you cant store images in mongodb, you can store the links to images. And I am not high as I say this, if the images are small, like 100x100 px, U can try storing the image in binary, and reform and image on the fly. But, it will take some time to render the images, and hence I suggest you to save the link, and just fetch that image and populate it dynamically.
好吧，AFAIK，你不能在 mongodb 中存储图像，你可以存储图像的链接。而且我不是这么说的，如果图片很小，比如100x100像素，你可以尝试将图片存储为二进制，并在飞行中进行图像改造。但是，渲染图像需要一些时间，因此我建议您保存链接，然后获取该图像并动态填充它。
You can use GridFS to store larger binary objects.
您可以使用 GridFS 来存储更大的二进制对象。
Since you are new to mongoDB, take a look at:
由于您是 mongoDB 的新手，请看一下：
You can also always ask on SO, I am also new to mongoDB, and wouldn't mind helping a newbie along :D
您也可以随时询问 SO，我也是 mongoDB 的新手，不介意帮助新手：D
回答by Scott Hernandez
For small (<1mb) images I'd suggest storing them in a binary field (byte[] in java); if you have larger files GridFS will work better.
对于小（<1mb）图像，我建议将它们存储在二进制字段中（java 中的 byte[]）；如果您有更大的文件，GridFS 会更好地工作。
I store lots of thumbnails in my documents directly using a simple binary field.
我使用简单的二进制字段直接在我的文档中存储了大量缩略图。
I use Morphia (http://code.google.com/p/morphia) to store my POJOs.
我使用 Morphia (http://code.google.com/p/morphia) 来存储我的 POJO。
