MongoDBに画像を保存してnode.js(Express)とangularJSで表示する ref: http://qiita.com/AbeHaruhiko/items/e38eb90982bb289af246

db.js

exports.book.read = function(req, res) {
  Book.find({ title: 'とある本' }, function(err, docs) {
    if (err) throw new Error(err);
    res.send(docs);
  });
};

file0.java

private String stringifyBitmap(Bitmap bitmap) {
        ByteArrayOutputStream byteArrayBitmapStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayBitmapStream);
        return Base64.encodeToString(byteArrayBitmapStream.toByteArray(), Base64.DEFAULT);
}

java

private String stringifyBitmap(Bitmap bitmap) {
        ByteArrayOutputStream byteArrayBitmapStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayBitmapStream);
        return Base64.encodeToString(byteArrayBitmapStream.toByteArray(), Base64.DEFAULT);
}

jsondata

{
  jsondata: {
    title: 'とある本',
    coverImage: <BASE64エンコード済みの文字列>
  }
}

main.html

<img src="data:image/gif;base64,{{book.coverImage}}"/>

main.js

angular.module('angularApp').controller('MainCtrl', function ($scope, $http) {
  var url = '/book';

  $scope.book = [];
  $scope.getBook = function() {
    $http.get(url).success(function(data) {
      $scope.book = data;
    });
  };

  $scope.getBook();
});

model.js

// Bookスキーマを定義
var BookSchema = new mongoose.Schema({
    title  : String,
    coverImage : String
});

exports.Book = db.model('Book', BookSchema);

web.js

app.get('/book', db.book.read); // GETの処理。要認証