blob

I have a difficult question to you, which i'm struggeling on for some time now. I'm looking for a solution, where i can save a file to the users computer, without the local storage, because local storage has 5MB limit. I want the "Save to file"-dialog, but the data i want to save is only available in javascript and i would like to prevent sending the data back to the server and then send it again. The use-case is, that the service im working on is saving compressed and encrypted chunks of the users data, so the server has no knowledge whats in those chunks and by sending the data back to the

I'm trying to create a rest service for my android application where an external database returns items to be stored in the applications local database. I've got everything working except blobs are being returned as null. this is an example of my jason response.(picture and thumbnail fields are blobs) {"id":"2","user_id":"1","name":"testing","type":"bouldering","picture":null,"lat":"36","long":"81","alt":"41932","accuracy":"53","thumbnail":null} Here is my php script to return the data. <?php require_once('config.php'); $mysqli = new mysqli(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME); $sql = 'select

Sorry for the Noob Question, but what does the circled button mean, and how can I view the content of a blob? (source: rigel222.com ) ftrotter earlier versions of phpmyadmin had a setting called $cfg['ShowBlob'] = TRUE; That would allow you to view the contents of blobs in the browser. You should note that this would cause chaos if you were storing binary files in blobs, since you would see endless gobblygok in the browser window. There are some people (like me) who decided that their application needed to use BLOB types to store text (seemed like a good decision at the time, and as I recall

I have a global DBAdapter and also for each Table one. In my global DB-Adapter I added the type "BLOB" to the column. But i don't get what i have to change in my DBAdapter for the specific Table. What I need to change there that it also works with the BLOB type. So here you go: Global DBAdapter: package de.retowaelchli.filterit.database; import android.content.Context; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import de.retowaelchli.filterit.database.ADFilterDBAdapter; public class DBAdapter { public

Hibernate映射类型分为两种：内置的映射类型和客户化映射类型。内置映射类型负责把一些常见的Java类型映射到相应的SQL类型；此外，Hibernate还允许用户实现UserType或CompositeUserType接口，来灵活地定制客户化映射类型 1.内置映射类型 1).Java基本类型的Hibernate映射类型 Java类型 Hibernate映射类型 标准SQL类型 大小和取值范围 int/Integer int/integer INTEGER 4Byte long/Long long BIGINT 8Byte short/Short short SAMLLINT 2Byte byte/Byte byte TINYINT 1Byte float/Float float FLOAT 4Byte double/Double double DOUBLE 8Byte BigDecimal big_decimal NUMBERIC Numeric(8,2) char/Character/String character CHAR(1) 定长字符 String string VARCHAR 变长字符 boolean/Boolean boolean BIT 布尔类型 boolean/Boolean yes/no CHAR(1)('Y'/'N') 布尔类型 boolean

I have a table "Images" with two fields: Name VARCHAR2 Data BLOB I would like to export that table to a .sql file which I could import on another system. I tried to do so using the "Database unload" assistant of Oracle SQL Developer. However the generated file does just have the content for the names in it but not the data. Thus after importing I would end up with all the names but the data field would be null everywhere. I'd really prefer it just to be one file (I saw some examples that included dumping the data to one file per field on the fs...) Is it possible to generate such a script with

How to convert Part to Blob, so I can store it in MySQL? It is an image. Thank you My form <h:form id="form" enctype="multipart/form-data"> <h:messages/> <h:panelGrid columns="2"> <h:outputText value="File:"/> <h:inputFile id="file" value="#{uploadPage.uploadedFile}"/> </h:panelGrid> <br/><br/> <h:commandButton value="Upload File" action="#{uploadPage.uploadFile}"/> </h:form> My bean @Named @ViewScoped public class UploadPage { private Part uploadedFile; public void uploadFile(){ } } The SQL database BLOB type is in Java represented as byte[] . This is in JPA further to be annotated as @Lob .

What is the easiest way to convert byte array into Blob data type in MYSQL with java programming language? Blob blob = connection.createBlob(); blob.setBytes(1, bytes); Sirish You may try this one, if you are using hibernate.. Possibly the easiest way! :) Blob blob = Hibernate.createBlob(bytes); Blob fileBlob = new javax.sql.rowset.serial.SerialBlob(byteArray); 来源： https://stackoverflow.com/questions/6662813/easiest-way-to-convert-byte-array-into-blob-in-java