Using java to upload an image as a blob to an sql database
Question
I have a database that is set up like this
CREATE TABLE item (
ItemID int(11) NOT NULL auto_increment,
ItemName char(25),
YearManufactured int(11),
CopiesSold int(11),
AmountInStock int(11),
image blob,
Description char(30),
PRIMARY KEY (`ItemID`)
);
The table works fine, and I have been able to insert and delete from it just fine. I want to organize my code a little different and use Java as opposed to writing scriplets to update the table. The initial reason I wanted to switch to do this was because I wanted to be able to upload an image easier. This is my code:
Here is the scriplet to open up initially. The URL, UserID and Password are definitely correct.
<%
// Instantiating the connection to the database
String mysJDBCDriver = "com.mysql.jdbc.Driver";
String mysURL = "MY_ADDRESS";
String mysUserID = "USERNAME";
String mysPassword = "PASSWORD";
java.sql.Connection conn=null; // a new connection
try
{
DB db = new DB();
conn=db.dbConnect(mysJDBCDriver, mysURL,mysUserID,mysPassword);
db.insertImage(conn,"c:/Users/DPiganell/image_launch_a5.jpg");
db.getImageData(conn);
System.out.println("Connected successfully to database using JConnect");
session.setAttribute("connection", conn);
}
catch(Exception e)
{
e.printStackTrace();
out.print(e.toString());
}
%>
Here is my DB Object
package DBPackage;
import java.io.*;
import java.sql.*;
public class DB
{
public DB() {}
public Connection dbConnect(String db_driver, String db_connect_string,
String db_userid, String db_password)
{
try
{
Class.forName(db_driver);
Connection conn = DriverManager.getConnection(
db_connect_string, db_userid, db_password);
System.out.println("connected");
return conn;
}
catch (Exception e)
{
e.printStackTrace();
return null;
}
}
public void insertImage(Connection conn,String img)
{
int len;
String query;
PreparedStatement pstmt;
try
{
File file = new File(img);
FileInputStream fis = new FileInputStream(file);
len = (int)file.length();
// query = ("UPDATE item SET image = ? WHERE ItemID = ?");
query = ("INSERT INTO ITEM (ItemType, ItemName, YearManufactured, CopiesSold, AmountInStock, image, description) "
+ "VALUES(?,?,?,?,?,?,?");
pstmt = conn.prepareStatement(query);
pstmt.setString(1, "DVD");
pstmt.setString(2, "fsd");
pstmt.setInt(3, 1991);
pstmt.setInt(4, 6);
pstmt.setInt(5, 7);
pstmt.setString(7, "works");
// Method used to insert a stream of bytes
pstmt.setBinaryStream(6, (InputStream)fis, len);
pstmt.executeUpdate();
}
catch (SQLException e)
{
e.printStackTrace();
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void getImageData(Connection conn)
{
byte[] fileBytes;
String query;
try
{
query = "select image from item where ItemID=3";
Statement state = conn.createStatement();
ResultSet rs = state.executeQuery(query);
if (rs.next())
{
fileBytes = rs.getBytes(1);
OutputStream targetFile=
new FileOutputStream(
"C:/Users/DPiganell/newImage.jpg");
targetFile.write(fileBytes);
targetFile.close();
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
};
Once the program reaches executeUpdate, and exception is thrown. Any help is appreciated. I am willing to take a different approach if it is easier.
SQLException Stacktrack:
SEVERE: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)
at DBPackage.DB.insertImage(DB.java:55)
at org.apache.jsp.header_jsp._jspService(header_jsp.java:61)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:787)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:649)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:534)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1015)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:60)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
SEVERE: at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
SEVERE: at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
SEVERE: at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
SEVERE: at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
SEVERE: at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
SEVERE: at com.mysql.jdbc.Util.getInstance(Util.java:386)
SEVERE: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1053)
SEVERE: at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
SEVERE: at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
SEVERE: at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
SEVERE: at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
SEVERE: at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
SEVERE: at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
SEVERE: at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
SEVERE: at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)
SEVERE: at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)
SEVERE: at DBPackage.DB.insertImage(DB.java:55)
SEVERE: at org.apache.jsp.header_jsp._jspService(header_jsp.java:61)
SEVERE: at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
SEVERE: at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
SEVERE: at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
SEVERE: at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
SEVERE: at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:787)
SEVERE: at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:649)
SEVERE: at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:604)
SEVERE: at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:534)
SEVERE: at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1015)
SEVERE: at org.apache.jsp.index_jsp._jspService(index_jsp.java:60)
SEVERE: at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
SEVERE: at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
SEVERE: at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
SEVERE: at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
SEVERE: at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
SEVERE: at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
SEVERE: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
SEVERE: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
SEVERE: at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
SEVERE: at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
SEVERE: at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
SEVERE: at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
SEVERE: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)
SEVERE: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
SEVERE: at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
SEVERE: at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
SEVERE: at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
SEVERE: at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
SEVERE: at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
SEVERE: at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
SEVERE: at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
SEVERE: at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
SEVERE: at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
SEVERE: at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
SEVERE: at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
SEVERE: at java.lang.Thread.run(Thread.java:722)
1 answers
solution1
0 2012-11-28 02:15:49
您的查询语法看起来不正确，请检查方括号。
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
Upload file to database (blob) using Angular
Upload a file to Azure Blob storage using Java
Create excel file by fetching data from database and upload it to azure blob using Java
Error java.sql.SQLException: not implemented by SQLite JDBC driver when Retrieving Blob (Image) from Database
Java EE - Upload image to database?
Blob image from database to Java and from Java to Javascript Image
Uploading image to database using AJAX is not uploading as blob
Insert BLOB in Derby Database using SQL
Unable to persist java.sql.BLOB into oracle BLOB using JPA
Retrieve an image(Long Blob) from database(SQL) and display it into JLabel
Related Tags