Java Get Blob As String

This allows an application to e. Preparation code < script > Benchmark. It reallocates the string’s bytes to a new array only to satisfy API constraints. LocalTime or String instead of java. The Java Native Interface (JNI) is a foreign function interface programming framework that enables Java code running in a Java virtual machine (JVM) to call and be called by native applications (programs specific to a hardware and operating system platform) and libraries written in other languages such as C, C++ and assembly. If you want to use it later in your. Object BLOB 255 5 blob_type Blob Type java. Blob Blame Raw # RPM conditionals so as to be able to dynamically produce # slowdebug/release builds. When we use literal strings in Java, we use the quote (") character to indicate the beginning and ending of a string. setXXX or ResultSet. This Java String tutorial explains how to work with Java Strings. The signature or syntax of string getBytes() method is given below:. Recently I wanted to get the size of the data stored in the BLOB field of a MySQL table. C# (CSharp) Microsoft. with_systemtap 0 %endif # New Version-String scheme-style. Here is what it looks like in our class :. Creates a new Blob. Convert String To Blob Angular 2. We have a Blob in one of our classes here and we manage it with a byte[]. In Spring we can persist and load large objects by using the JdbcTemplate. Data of any type can (usually) be inserted into any column. toString method to get the string representation of character array. Join the community of millions of developers who build compelling user interfaces with Angular. Answer: As you have demonstrated, there are many ways to get the average length of a BLOB column. MD5 value of blobs range bits. Quick Regex Methods of The String Class. Why not have 'BLOBEXTRACT' or 'BLOBLOADER' (not to confuse w/ the export/import commands) to extract BLOB data back out again or to import BLOB back in again. Step by step instructions to download Azure BLOB storage using Azure PowerShell. Windows Azure Storage connection strings you can shortcut the connection string. A trie node should contains the character, its children and the flag that marks if it is a leaf node. When we use literal strings in Java, we use the quote (") character to indicate the beginning and ending of a string. txt file having east European characters (like, say, German) created in ANSI file format (which is default of notepad on Windows) in java using BuuferedReader and InputStreamReader. Java SE Development Kit 8 Downloads. Serializable in class. isGoogleType() Boolean: Returns whether this blob is a G Suite file (Sheets, Docs, etc. length()); String s = new String(bdata); It is working fine but when I'm going to convert String to Blob and trying to insert into database then nothing inserting into database. The getting started sample demonstrates how to perform common tasks using the Azure Blob Service in Java including uploading a blob, CRUD operations, listing, as well as blob snapshot creation. I used this SQL to create a function. To serialization of object you need to implement, serializable interface java. It compiled with no errors. need to update the connect string as appropriate for your database. I cannot get it to work, something like the code below return null:. In java, objects of String are immutable which means a constant and cannot be changed once created. image, so therefore we create one additional field of type image in our class. Java Code Example : This example source code demonstrates the use of getBytes() method of String class. Contract To download file client will have to provide ContainerName and filename to be downloaded. >>BeanUtils does not convert String to Blob. can you please provide inputs to improve the speed?. And from the blob i could create the original file, using the same dbms_lob and utl_file package. See Section 5. isGoogleType() Boolean: Returns whether this blob is a G Suite file (Sheets, Docs, etc. How can I use a quote " character within a string? Answer. Blob definition is - a small drop or lump of something viscid or thick. This could. The other jars are only needed by the test suite. Get a UUID as a string (equivalent to using the java. I cannot get it to work, something like the code below return null:. generate URL or filesystem safe Base64 strings. Clob objects, you can retrieve CLOB values with the getClob() method on ResultSet objects. LogInformation($"C# Blob trigger function Processed blob Name:{name} Size: {myBlob. getParameter('blob-key')). The requirement is to put the BLOB into a file. And the Apache Commons I/O library does just that: String source = “String to convert to an InputStream”;. The signature or syntax of string getBytes() method is given below:. Use with XMLHttpRequest. The HTML and JavaScript code below makes use of some features of HTML5 (specifically the "Blob" object, the File API, and the "download" attribute of the "a" tag) to allow the user to load, edit, and save a text file on their local computer. Robin Shahan continues her series on Azure Blob Storage as she describes how to interact with the service using the. Hi! What you should do is that you should let the servlet output the image to the servlet http response and have the response. The code also shows the use of the Arrays. Java String/int FAQ: How do I convert a String to an int data type in Java? Answer: Convert a string to an integer with the parseInt method of the Java Integer class. In JDK 7, the most important classes for binary files are: Paths and Path - file locations/names, but not their content. We will use the candidates table in the mysqljdbc sample database. The CHARACTER data type accepts character strings, including Unicode, of a fixed length. Download JDBC Driver. There are storage client libraries for Java. toPdf(stringToConvert) Creates a binary object out of the given string, encoding it as a PDF file. setContentType(contentType) Blob: Sets the content type of the bytes in this blob. How to get JDBC Connection object using properties file?. The characters could be letters, numbers or symbols and are enclosed within two quotation marks. One of the parameters contains special characters like “\” and “/”. String literal is a sequence of characters used by Java programmers to populate String objects or display text to a user. The requirement is to put the BLOB into a file. txt file having east European characters (like, say, German) created in ANSI file format (which is default of notepad on Windows) in java using BuuferedReader and InputStreamReader. This means that BLOB SUB_TYPE TEXT CHARACTER SET OCTETS will not be considered for the octetsAsBytes property (but people should use BLOB SUB_TYPE BINARY for that anyway). This is a quick reference guide to highlight some key syntactical differences between Java and C#. JBDC 2 also added new methods, such as getBlob, setBinaryStream, getClob, setBlob, and setClob, in the interfaces ResultSet, PreparedStatement, and CallableStatement, to access SQL BLOB and CLOB values. Nearly all of the time we face situations, where we need to iterate some Java Collections and filter the Collection based on some filtering logic. Java Strings are represented as arrays of characters internally in memory. This allows an application to e. if you have String "ab" then it will have just 2 permutations "ab" and "ba", because position of character in both String are different. Java object can be saved in any database after serialization of objects. Java; Database SQL JDBC; Blob Binary Data JDBC javaDemo"; static String. fun revokeObjectURL (url: String) Licensed under the Apache 2 license Kotlin Trademark is protected under the Kotlin Foundation. Converting Number to String. The other jars are only needed by the test suite. The HTML and JavaScript code below makes use of some features of HTML5 (specifically the "Blob" object, the File API, and the "download" attribute of the "a" tag) to allow the user to load, edit, and save a text file on their local computer. Convert Blob to String in JavaScript. Begin mea culpa. Signature: There are two type of string format() method:. A by-product of the import process is a generated Java class which can encapsulate one row of the imported table. Ask a question under the. It has great weight and size. getBlob Method (java. Windows Azure Storage connection strings you can shortcut the connection string. I would feed the BLOB value into the JTX as a Binary port (set the precision high enough to cope for all possible values in your environment, but keep in mind that PowerCenter cannot handle port sizes above 100 MB) and then convert as proposed by Ravi (second and third line of code). There are 14 members in the field, I can cast most of them into String through Datum instance, but the object #14 is BLOB, will not allow me cast it to String directly, so I use byte[] and cast it though new String(). Data types for updating table columns. Hexadecimal (or "hex" for short) is a numbering system which works similarly to our regular decimal system, but where a single digit can take a value of 0-15 rather than 0-9. In the Windows Azure MSDN Azure. Solution There are various methods to convert a file in a byte array in java. In this example we focus on capturing and uploading images, with the same approach you can upload any binary data to Blob Storage. JBDC 2 also added new methods, such as getBlob, setBinaryStream, getClob, setBlob, and setClob, in the interfaces ResultSet, PreparedStatement, and CallableStatement, to access SQL BLOB and CLOB values. Download source code for Read a Excel blob file using Excel Data Reader in Azure. BLOB is a field which can be used to store variable amount of data. WindowsAzure. Convert String To Blob Angular 2. How to Add Leading Zeros to Integers in Java – String Left Padding Example Program From Java 5 onwards it's easy to left pad Integers with leading zeros when printing number as String. s is the string to encode. Java object can be saved in any database after serialization of objects. getBlob(cloumnName[i]); byte[] bdata = blob. SignedIdentifier String: id Get the id value. What is DatabaseMetaData? Write an example code. This Java String tutorial explains how to work with Java Strings. Solution There are various methods to convert a file in a byte array in java. The Storage page in the Drill Web UI provides an Azure Blob Storage plugin that you configure to connect Drill to the Azure Blob Storage file system registered in core-site. Note that it is possible to get repeats if the matched elements contain both parent elements and their own children, as the Element. The four TEXT types are TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT. In the Java language, no foreach keyword is used. Once you have the blob reference, you can upload data to it by using Cloud Block Blob. The simplest way to insert a binary string into a BLOB column is to use a SQL INSERT statement and include the binary string a SQL binary literal in the statement as shown in this sample program. Since SQL data types and Java data types are not identical, there needs to be some mechanism for reading and writing data between an application using Java types and a database using SQL types. Data of any type can (usually) be inserted into any column. @Lob annotation Client code to insert and retrieve the clob/blob types End to End ADFaces application to retrieve the image from database table and display it in web page. I want to store a series of. copyProperties operates on. getBytes(String charsetName) method encodes this String into a sequence of bytes using the named charset, storing the result into a new byte array. Converting Number to String. JSON array is an ordered collection of values, which are enclosed within brackets e. How to convert image to byte array and byte array to image in Java Java code to get that this is a very long string. MD5 value of blobs range bits. One of the parameters contains special characters like “\” and “/”. Robin Shahan continues her series on Azure Blob Storage as she describes how to interact with the service using the. These differ only in the maximum length of the values they can hold. Returns the Content-MD5 property if one was stored/set with the blob. valueOf(stringToBlob) Casts the specified String to a Blob. For the sake of demonstration, we will add one more column named resume into the candidates table. toString() String() Template Strings; Concatenating an Empty String. Clob to support mapping for these new SQL types. In the StorageManager component, we’re using a simple approach to be able to store binary data in the database, or on disk. Cast from higher fractional seconds precision to lower fractional seconds precision performs round half up; if result of rounding is higher than maximum supported value. The getBytes() method encodes a given String into a sequence of bytes and returns an array of bytes. Java String/int FAQ: How do I convert a String to an int data type in Java? Answer: Convert a string to an integer with the parseInt method of the Java Integer class. You can use BinaryWriter Java transformation to write binary data as a flat file. Convert String To Blob Angular 2. We can’t change data directly in a Blob, but we can slice parts of a Blob, create new Blob objects from them, mix them into a new Blob and so on. A trie node should contains the character, its children and the flag that marks if it is a leaf node. [Open source, LGPL]. 4 and has been falling in love with Java since then. Object BLOB 255 5 blob_type Blob Type java. String(byte[] byte_arr) – Construct a new String by decoding the byte array. The getBytes() method encodes a given String into a sequence of bytes and returns an array of bytes. Java Programming Tutorial, learn Java programming, Java aptitude question answers, Java interview questions with answers, Java programs, find all basic as well as complex Java programs with output and proper explanation making Java language easy and interesting for you to learn. A by-product of the import process is a generated Java class which can encapsulate one row of the imported table. This is one viable approach. How to select a BLOB Oracle Database Tips by Donald BurlesonApril 22, 2015 - Updated 12 October 1014 Question: I want to read a BLOB into my PL/SQL but I don't understand how to modify the select statement to accept a large result value. It's in no way meant to be a secure encryption method, but it is extremely useful for writing obfuscated strings to either a document (your webpage) or a cookie file without needing to worry about quotes or characters. Without the FOR argument, it returns all the remaining bytes in the string. fun revokeObjectURL (url: String) Licensed under the Apache 2 license Kotlin Trademark is protected under the Kotlin Foundation. Serializable in class. The difference between a built-in array and an ArrayList in Java, is that the size of an array cannot be modified (if you want to add or remove elements to/from an array, you have to create a new one). Convert Oracle BLOB to XML Type Oracle Database Tips by Donald BurlesonMarch 7, 2015 Question: I need to Convert Data stored [ Blob Type ] column to [ XML TYPE ] column in a Table and extract the XML data from the XML TYPE column. It's not even an animal, really — more like a living pile of old yellow silly string with a. ExportBlob(java. Solution - Using Recursion and Loop Now let's get back to the problem, Permutation refers to ordering of characters but it takes position into account i. Azure Blob storage is a service for storing large amounts of unstructured data. Interactive API reference for the JavaScript FormData Object. If no length is specified during the declaration, the default length is 1. The intent of this project is to help you "Learn Java by Example" TM. How do you convert to/from hexadecimal in Java? At some point early on in your programming career you will come across hexadecimal notation. We can’t change data directly in a Blob, but we can slice parts of a Blob, create new Blob objects from them, mix them into a new Blob and so on. There are 3 variant of getBytes() method. The most common way of formatting a string in java is using String. com ] Most developers use Azure Blob storage to upload their BLOB data from their apps, and Android developers can use the following code to upload a BLOB from the device. How to use blob in a sentence. Why not have 'BLOBEXTRACT' or 'BLOBLOADER' (not to confuse w/ the export/import commands) to extract BLOB data back out again or to import BLOB back in again. There would be no impact on Java code or any other bean definitions. The Paris Zoological Park has added a brand-new blob to their collection. I cannot get it to work, something like the code below return null:. It does not enforce data type constraints. getlength procedure. updateXXX methods in JDBC programs, and for input host expressions in SQLJ programs. Java String/int FAQ: How do I convert a String to an int data type in Java? Answer: Convert a string to an integer with the parseInt method of the Java Integer class. I would feed the BLOB value into the JTX as a Binary port (set the precision high enough to cope for all possible values in your environment, but keep in mind that PowerCenter cannot handle port sizes above 100 MB) and then convert as proposed by Ravi (second and third line of code). How do I convert a JDBC Blob to a String? java , jdbc Add comments Read the bytes from the blob using a ByteArrayOutputStream and then create a String from the resulting byte array. Java String getBytes() The java string getBytes() method returns the byte array of the string. Low-level access to RSA key formats provides easy solution for key format incompatibility problem that could look as an irresistible hinder between OpenSSL and CryptoAPI. I'm trying to get string from BLOB datatype by using. (Java) Azure Blob Service - List all Containers in a Storage Account. Usually, you need to cut a string delimiter and parse other string parts into an array or list. can you please provide inputs to improve the speed?. The Paris Zoological Park has added a brand-new blob to their collection. We can concatenate the strings using this method and at the same time, we can format the output concatenated string. But what i want now is just to get the text/contents in that word doc. In the Windows Azure MSDN Azure. valueOf(stringToBlob) Casts the specified String to a Blob. Quick Regex Methods of The String Class. How to insert an image into database table? or Write an example for inserting BLOB into table. The readAsDataURL method is used to read the contents of the specified Blob or File. toString method to get the string representation of character array. Blob definition is - a small drop or lump of something viscid or thick. toDataURL()) usually you will upload and in the server do the base64 decode, if you want to process the data in javascript you will find the data will got corrupted since it’s processed as string. The following code examples are extracted from open source projects. Blob, Clob, and NClob Java objects remain valid for at least the duration of the transaction in which they are created. Get database connection There are two sources of database connections - either a DataSource or a DriverManager. Content-MD5. Can anyone suggest me the possibilities of this. Contract To download file client will have to provide ContainerName and filename to be downloaded. Hi Tom, We have inserted the BLOB field into the database. MD5 value of blobs bits. Now let's look at the Java code for the example business object. Has anyone tried converting from JSON to BLOB(or STRING) in IIB JavaCompute node(or Compute node) while using JSON domain. Robin Shahan continues her series on Azure Blob Storage as she describes how to interact with the service using the. The Java source code for this class is also provided to you, for use in subsequent MapReduce processing of the data. Java; Database SQL JDBC; Blob Binary Data JDBC javaDemo"; static String. You can use BinaryReader Java transformation to read binary data from sources such as image file, PDF, audio file, or a video file. BLOB is a field which can be used to store variable amount of data. Example also shows how to set character encoding while converting String. Use update query to update a existing data in a table. To run the program, first create the following table and data as scott/tiger: create table test_lob (c1 number, c2 clob, c3 blob);. See Section 5. We'll also look at how to convert a string array to map using Stream API. Let's look at an example. It's not even an animal, really — more like a living pile of old yellow silly string with a. First look at what type of data it is and how was it converted to BLOB column data before trying to blindly convert it to a string. Kashish Durgiya said Fascinating article. Have you tried using a byte array. Well, the first problem is that String contains character data, while BLOB contains binary data. The parseInt method is to convert the String to an int and throws a NumberFormatException if the string cannot be converted to an int type. How to read Blob data into String Object using Spring JDBCTemplate. I am not able to retrieve the BLOB into a file from the database. The Paris Zoological Park has added a brand-new blob to their collection. This identifier is not guaranteed to be unique across all time and space. com ] Most developers use Azure Blob storage to upload their BLOB data from their apps, and Android developers can use the following code to upload a BLOB from the device. This allows an application to e. GetSharedAccessSignature - 13 examples found. " [ John Atten on codeproject. Technically, it’s very easy to implement the InputStream API on top of the String itself. Encoding and decoding a string in Base64 with JavaScript can be quite handy. Convert javascript string to UTF-8 bytes using File API JavaScript performance comparison. Java ArrayList. On getting, user agents must return the type of a Blob as an ASCII-encoded string in lower case, such that when it is converted to a byte sequence, it is a parsable MIME type, or the empty string – 0 bytes – if the type cannot be determined. Blob, Clob, and NClob Java objects remain valid for at least the duration of the transaction in which they are created. We'll also look at how to convert a string array to map using Stream API. If the endpoint is an ApiController than you may have problems if you encode the parameter using the http encoder. The result will be a String consisting of random characters, representing the image. setContentType("i mage/gif"); put there. Update statement: This tutorial explains how to update an existing row in a table in MySQL using java statement example, Load the MySQL driver using Class forName method and create a connection to communicate with MySQL database and then create a statement object to send and receive from java code and use execute Update to execute the query. Releasing Resources Held by Large Objects. I’ll explain to you 5 the most popular methods how to split a string in Java. However, this Java code assumes that within the JTX the BLOB values are retrieved. Hi, I need to save base 64 string as an image in blob storage. getlength procedure. ; Files - operations on file content. setup = function. How to use blob in a sentence. Since the Blob object in JDBC is implemented using an SQL locator, it holds a logical pointer to the SQL BLOB (not the data). The intent of this project is to help you "Learn Java by Example" TM. In previous article, you learn about how to compress a file into a GZip format. Without the FOR argument, it returns all the remaining bytes in the string. Do any one of you have any idea about how to read the actual xml ( which is a string) from the. In this tutorial, we will show you how to convert a String to java. Does anyone know how to convert a BLOB (which is RTF format) into a string? I found this code to do it, but it doesn't work. Blob interface of the JDBC API represents the BLOB datatype. This means that BLOB SUB_TYPE TEXT CHARACTER SET OCTETS will not be considered for the octetsAsBytes property (but people should use BLOB SUB_TYPE BINARY for that anyway). [Open source, LGPL]. exe file for some application, a Justin Beiber mp3 song anything. Here is what it looks like in our class :. Here is what it looks like in our class :. I'm trying to get string from BLOB datatype by using. It does not enforce data type constraints. We will use the candidates table in the mysqljdbc sample database. The simplest way to insert a binary string into a BLOB column is to use a SQL INSERT statement and include the binary string a SQL binary literal in the statement as shown in this sample program. hi Guys, I have a BLOB field in Oracle table which holds the binary representation of some XML file. Blob, Clob, and NClob Java objects remain valid for at least the duration of the transaction in which they are created. need to update the connect string as appropriate for your database. Note that the image that will be sent to the report will be a type of java. For years, I have been using the toString(), toBase64(), and toBinary() functions to convert values back and forth between String and Binary formats in ColdFusion. I think you will agree that split a string in Java is a very popular task. Java Example Solution Code; Java String Introduction (video) Java Substring v2 (video) Java String Equals and Loops; Java String indexOf and Parsing; Java If and Boolean Logic If Boolean Logic Example Solution Code 1 (video) If Boolean Logic Example Solution Code 2 (video) Java For and While Loops; Java Arrays and Loops; Java Map. The most direct way to create a string is to write − String greeting = "Hello world!"; Whenever it encounters a string literal in your code, the compiler creates a String object with its value in this case, "Hello world!'. It's in no way meant to be a secure encryption method, but it is extremely useful for writing obfuscated strings to either a document (your webpage) or a cookie file without needing to worry about quotes or characters. How to get JDBC Connection object using properties file?. a search on "java convert blob to string" will give you hints reading the InputStreamReader API will give you more hints: An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. Once you have the blob reference, you can upload data to it by using Cloud Block Blob. The examples in this post were updated in September to work with the current version of the Windows Azure Storage REST API. Hibernate an open source Java persistence framework project. GetSharedAccessSignature extracted from open source projects. And the Apache Commons I/O library does just that: String source = “String to convert to an InputStream”;. The Paris Zoological Park has added a brand-new blob to their collection. The java string format() method returns a formatted string using the given locale, specified format string and arguments. Here is what it looks like in our class :. Just check out Network tab in Dev tools while you play the video to see what you are actually fetching. If you did not define your Azure Blob Storage credentials in the core-site. hi Guys, I have a BLOB field in Oracle table which holds the binary representation of some XML file. Use update query to update a existing data in a table. SUBSTRING returns the stream of bytes starting at byte position startpos (the first byte position being 1). Have you tried using a byte array. sql; How to Read BLOBs Data from Database/Resultset in Java? (String[] args. toPdf(stringToConvert) Creates a binary object out of the given string, encoding it as a PDF file. The other jars are only needed by the test suite. java) This example Spring Framework source code file (SqlLobValue. Azure Storage Blob Service REST API: Lists all the containers in a storage account. There are some built-in methods in JavaScript that provide conversion from an number data type to a String, which only differ in performance and readability. can you please provide inputs to improve the speed?. Since the Blob object in JDBC is implemented using an SQL locator, it holds a logical pointer to the SQL BLOB (not the data). Does anyone know how to convert a BLOB (which is RTF format) into a string? I found this code to do it, but it doesn't work. com REST API. Here I am providing a java program that shows the use of String in java switch case statements. Contract To download file client will have to provide ContainerName and filename to be downloaded. GetSharedAccessSignature - 13 examples found. For years, I have been using the toString(), toBase64(), and toBinary() functions to convert values back and forth between String and Binary formats in ColdFusion. See Section 5. On getting, user agents must return the type of a Blob as an ASCII-encoded string in lower case, such that when it is converted to a byte sequence, it is a parsable MIME type, or the empty string – 0 bytes – if the type cannot be determined. I will be using Apache Commons Codec library to achieve the ‘Convert Image to String and String to Image in Java’. The requirement is to put the BLOB into a file. Usually, you need to cut a string delimiter and parse other string parts into an array or list. Read BLOBs data from database : Blob Binary Data JDBC « Database SQL JDBC « Java. getBlob Method (java. Hi! What you should do is that you should let the servlet output the image to the servlet http response and have the response. How to convert image to byte array and byte array to image in Java Java code to get that this is a very long string. As you might know, localStorage is quite powerful when it comes to quickly storing information in the user’s web browser, and it has also been around in all web browsers a long time. All that I want is a SIMPLE WAY(nothing more nothing less) to extract BLOB data back out again. The Java Native Interface (JNI) is a foreign function interface programming framework that enables Java code running in a Java virtual machine (JVM) to call and be called by native applications (programs specific to a hardware and operating system platform) and libraries written in other languages such as C, C++ and assembly. Now let's look at the Java code for the example business object. May 24, 2015 — by Jan-Philip Gehrcke For an AngularJS-based web application I am currently working on, I want to put arbitrary text information into a URL, send it to the client, and have it decoded by the browser. To run the program, first create the following table and data as scott/tiger: create table test_lob (c1 number, c2 clob, c3 blob);. CloudBlobContainer. We could use JNDI to get a data source from an application server in a single alternative XML stanza, as follows. We have a Blob in one of our classes here and we manage it with a byte[]. About the Author: Nam Ha Minh is certified Java programmer (SCJP and SCWCD). You can use BinaryReader Java transformation to read binary data from sources such as image file, PDF, audio file, or a video file. tl;dr - blob URL sounds like the binary you want to get but there might be easier way to get the video. Declaration. if you have String "ab" then it will have just 2 permutations "ab" and "ba", because position of character in both String are different. Many Java beginners are stuck in the Date conversion, hope this summary guide will helps you in some ways. The image field in the database table can be of data type blob, medium blob or long blob. Nearly all of the time we face situations, where we need to iterate some Java Collections and filter the Collection based on some filtering logic. Low-level access to RSA key formats provides easy solution for key format incompatibility problem that could look as an irresistible hinder between OpenSSL and CryptoAPI. String, oracle. CSV file is around 30 MB, it takes 2 minutes to upload to blob, but takes 30 minutes to read the stream. If available, JNDI and the DataSource interface should be used to get a Connection instead of DriverManager. The method can be used in below two ways: public byte[] getBytes(String charsetName): It encodes the String into sequence of bytes using the specified charset and return the array of those bytes. How to read an image from database table? or Write an example for reading BLOB from table.