Loading an SQL in a Java Class

Hi Forum
I'm writing a test for some of my work and I want to load some data into a mysql db. How do I do that From my Java testfile?
I know I could load it manually before running the test but I want it to be loaded by the testclass when I run the testclass.
tia

Do a search in the Java Database Connectivity (JDBC) forum - it should contain hundreds of examples of how to use JDBC with a MySQL database.
However, direct JDBC access is not always the best way to load in a large dataset - if you've got a command-line means of importing the data then you might find it better to call that directly using Runtime.exec.
Hope this helps.

Similar Messages

Sql type to Java class?

I want to write a utility class to generate a java source file (bean) from out of the metadata of a database table. the metadata returns the column type as a java.sql.Types constant (int value). now, i want to map these int values to Java classes. (e.g. Types.INT => java.lang.Integer). Is there already such a method in the API or do i have to write my own switch ... case Types.INT ... result = Integer.class ... method?

well, i wrote my own utility method to generate such beans:
     * Convert SQL type code to corresponding Java class.
     * @param sqlType One of java.sql.Types.xxx.
     * @return Class that corresponds to the given type.
    public static Class toClass(int sqlType) {
        Class result = null;
        switch (sqlType) {
        case Types.BIGINT :
        case Types.INTEGER :
        case Types.SMALLINT :
        case Types.TINYINT :
            result = Integer.class;
            break;
        case Types.BIT :
        case Types.BOOLEAN :
            result = Boolean.class;
            break;
        case Types.CHAR :
            result = Character.class;
            break;
        case Types.DATE :
        case Types.TIMESTAMP :
            result = java.util.Date.class;
            break;
        case Types.DECIMAL :
        case Types.DOUBLE :
        case Types.FLOAT :
            result = BigDecimal.class;
            break;
        case Types.NULL :
            result = null;
            break;
        case Types.LONGVARCHAR :
        case Types.VARCHAR :
        default :
            result = String.class;
            break;
        return result;
    }//toClass()
     * Create a Java bean (source file) to map a database table. The class name is the table name, the bean
     * properties are the table columns. Each column will result in a property with a corresponding set() and
     * get() method.
     * @param connection Database connection to load table from.
     * @param schema Schema to get tables for.
     * @param tableName Name of table to create the bean for.
     * @param className Name of Java class to create.
     * @param fileName Name of Java source file to create.
     * @throws SQLException, IOException
    public static void createTableBean(Connection connection, String schema, String tableName, String className, String fileName)
            throws SQLException, IOException {
        if (connection != null && tableName != null && fileName != null) {
            //read table columns:
            DatabaseMetaData dmd = connection.getMetaData();
            ResultSet resultSet = dmd.getColumns(null, "%", tableName, null);
            Properties props = new Properties();
            if (resultSet != null) {
                while (resultSet.next()) { //for each table
                    String name = resultSet.getString("COLUMN_NAME");
                    int type = resultSet.getInt("DATA_TYPE");
                    props.setProperty(name, ""+type);
                }//next table
            }//else: resultSet unavailable
            //create source file:
            File file = new File(fileName);
            StringBuffer sb = new StringBuffer();
            sb.append("/* $Header:$ */\n");
            sb.append("package TODO;\n\n");
            sb.append("/**\n");
            sb.append(" * Container class to store data of one record (row) of table '"+tableName+"'.\n");
            sb.append(" *\n");
            sb.append(" * @version $Revision:$ ($Date:$)\n");
            sb.append(" * @author $Author:$\n");
            sb.append(" */\n");
            sb.append("public class ");
            sb.append(className);
            sb.append(" {\n\n");
            Enumeration enum = props.keys();
            StringBuffer sb2 = new StringBuffer(); //methods
            StringBuffer sb3 = new StringBuffer(); //toString()
            while (enum.hasMoreElements()) {
                String columnName = (String) enum.nextElement();
                //change first character of column name to lower case:
                String fieldName = columnName.substring(0, 1).toLowerCase() + columnName.substring(1);
                String stype = props.getProperty(columnName, ""+Types.VARCHAR);
                int type = (new Integer(stype)).intValue();
                Class javaClass = toClass(type);
                String typeName = "String"; //default
                if (javaClass != null) {
                    String javaClassName = javaClass.getName();
                    int lastDot = javaClassName.lastIndexOf('.');
                    if (lastDot >= 0) {
                        typeName = javaClassName.substring(lastDot + 1);
                //field:
                sb.append("    /** ");
                sb.append(columnName);
                sb.append(" */\n");
                sb.append("    private ");
                sb.append(typeName);
                sb.append(" ");
                sb.append(fieldName);
                sb.append(" = null;\n");
                //toString() method:
                sb3.append("        sb.append(\",");
                sb3.append(fieldName);
                sb3.append("=\");\n");
                sb3.append("        sb.append(");
                sb3.append(fieldName);
                sb3.append(");\n");
                //set method:
                sb2.append("    /**\n");
                sb2.append("     * Set ");
                sb2.append(columnName);
                sb2.append(".\n     *\n     * @param value ");
                sb2.append(columnName);
                sb2.append(" to set.\n");
                sb2.append("     */\n");
                sb2.append("    public void set");
                sb2.append(columnName);
                sb2.append("(");
                sb2.append(typeName);
                sb2.append(" value) {\n        ");
                sb2.append(fieldName);
                sb2.append(" = value;\n    }\n\n");
                //get method:
                sb2.append("    /**\n");
                sb2.append("     * Get ");
                sb2.append(columnName);
                sb2.append(".\n     *\n     * @return ");
                sb2.append(columnName);
                sb2.append(".\n     */\n");
                sb2.append("    public ");
                sb2.append(typeName);
                sb2.append(" get");
                sb2.append(columnName);
                sb2.append("() {\n");
                sb2.append("        return ");
                sb2.append(fieldName);
                sb2.append(";\n    }\n\n");
            }//next column
            sb.append("\n\n");
            sb.append(sb2.toString()); //methods
            //overwrite toString() method:
            sb.append("    /**\n");
            sb.append("     * Overwrite super.\n");
            sb.append("     *\n     * @return String representation of the object.\n");
            sb.append("     */\n");
            sb.append("    public String toString() {\n");
            sb.append("        StringBuffer sb = new StringBuffer(super.toString());\n\n");
            sb.append(sb3.toString());
            sb.append("\n        return sb.toString();\n");
            sb.append("    }\n\n");
            sb.append("}//"+className);
            //write to file:
            String text = sb.toString();
            BufferedWriter bw = null;
            try {
                bw = new BufferedWriter(new FileWriter(file));
                bw.write(text, 0, text.length());
            } finally {
                if (bw != null) {
                    try { bw.close(); } catch (IOException ioe) { /* ignore */ }
        }//else: input unavailable
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Accessing MS Sql Server with Java classes - problem connecting to socket

I found an example at this location which uses java classes to connected to MS Sql Server.
http://search400.techtarget.com/tip/1,289483,sid3_gci1065992,00.html
--bummer - it is a login location - so I will include the article
Anyway, the example is using Websphere, but I am still on Jbuilder (will get wsad soon). So I planted the classes from the example in
C:\Borland\JBuilder\jkd1.4\jre\lib\ext\...the classes
Then I copied the code from the example to my jpx project and got an error that it could not connect to the socket. The only thing I changed in the code was the connection string:
--original string from example:
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://1433", "");
I was getting an error with the 2 argument version of DriverManager - and the second argument here was empty (properties argument). Here was my connection string:
Connection connection = DriverManager.getConnection("jdbc:microsoft:sqlserver://Myserver:1433;User=sa;Password=");
I am only using the 1 argument version of DriverManager. Note that the password=" is blank because my RnD workstation is standalone - no one accesses the sql server except me - so no password. I also left out the last semicolon I noticed. Any suggestions appreciated how I could fix this.
Thanks
source of article:
http://search400.techtarget.com/tip/1,289483,sid3_gci1065992,00.html
iSeries 400 Tips:
TIPS & NEWSLETTERS TOPICS SUBMIT A TIP HALL OF FAME
Search for: in All Tips All search400 Full TargetSearch with Google
PROGRAMMER
Sample code: Accessing MS SQL Server database from the iSeries
Eitan Rosenberg
09 Mar 2005
Rating: --- (out of 5)
Nowadays with the help of Java the iSeries can be integrated with other databases quite easy. This tip shows you how. The code included here uses the free Microsoft driver that can be downloaded from here. (SQL Server 2000 Driver for JDBC Service Pack 3)
If your SQL server does not include the Northwind Sample Database you can find it here.
http://www.microsoft.com/downloads/details.aspx?familyid=07287b11-0502-461a-b138-2aa54bfdc03a&displaylang=en
The download contains the following files:
msbase.jar
mssqlserver.jar
msutil.jar
Those files needs to be copied to the iSeries directories (/home/r_eitan/ExternalJARs).
Here's the directory structure (on the iSeries) for this sample:
/home/r_eitan/ExternalJARs - Microsoft files (msbase.jar,mssqlserver.jar,msutil.jar)
/home/r_eitan/JdbcTest02 - My code (Main.java,Main.class)
The Java code
import java.sql.*;
import java.io.*;
class Main {
* Connect to Microsoft SQL server and download file northWind.products as tab
* seperated file. (products.txt)
public static void main(String args[]) {
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PrintStream outPut = new PrintStream(new BufferedOutputStream(new FileOutputStream("products.txt")));
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
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connection.setCatalog("northWind");
String sqlCmdString = "select * from products";
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(sqlCmdString);
ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
int columnCount = resultSetMetaData.getColumnCount();
// Iterate throught the rows in resultSet and
// output the columns for each row.
while (resultSet.next()) {
for (int index = 1; index <=columnCount; ++index)
String value;
switch(resultSetMetaData.getColumnType(index))
case 2 :
case 3 :
value = resultSet.getString(index);
break;
default :
value = """ + resultSet.getString(index) + """;
break;
outPut.print(value + (index < columnCount ? "t" : ""));
outPut.println();
outPut.close();
resultSet.close();
connection.close();
System.out.println("Done");
catch (SQLException exception)
exception.printStackTrace();
catch (Exception exception)
exception.printStackTrace();
--------------------------------------------------------------------------------------------------

My guess is that the server's host name isn't right. It necessarily (or even usually) the "windows name" of the computer. Try with the numeric IP address instead (type "ipconfig" to see it).
First aid check list for "connection refused":
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- Check port number in connect string.
- Try numeric IP address of server host in connect string, in case name server is hosed.
- Are there any firewalls between client and server blocking the port.
- Check that the db server is running.
- Check that the db server is listening to the port. On the server, try: "telnet localhost the-port-number". Or "netstat -an", there should be a listening entry for the port.
- Try "telnet serverhost the-port-number" from the client, to see if firewalls are blocking it.
- If "telnet" fails: try it with the numeric ip address.
- If "telnet" fails: does it fail immediately or after an obvious timeout? How long is the timeout?
- Does the server respond to "ping serverhost" or "telnet serverhost" or "ssh serverhost"?

(Class cast Exception)Problem while loading data fro database in java class

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In my java code i was trying to load the data to a UI.
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ie list.add(array);
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false,// ignoreErrors
true, // readSchema
true, // include pks
true, // include fks
true, // include indexes
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Once you have imported java class files on forms throgh java import class option..
it creates a pl/sql for the java class that you have imported.
names for the procedures are assigned by machine code, so dont worry about it..
for eg. if the name of a method in java class is Increment and after loading java class file the name of ur pl/sql is increment_1254.
when u call increment_1254 and pass parameter to the procedure ur class incerement will be called and desired operation will be performed.
ora_java.object is the objec that will be used to access the the class file.
as java is object oriented it requires a object to execute method of class.
so u have to initialize the object..
e.g. increment_1234 (ora_java.object,a,b) is ur procedure
to call this procedure do the following
declare
PASS ORA_JAVA.JOBJECT;
a,b integer;
begin
pass := <classname>.new; --new will be created if ur class is public or u got public constructor in ur class.
increment_1234 (pass,a,b) ; -- increment_1234 (ora_java.object,a,b) ;
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Thanks

Hi,
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Herald ten Dam
http://htendam.wordpress.com

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Thanks
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Hai Guys,
here is my java class:
import java.io.*;
public class ListFiles
public static void main (String[] args)
File file=new File("C:\\");
File[] files=file.listFiles();
for(int fileInList=0; fileInList<files.length; fileInList++ )
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how to load java class
how to use in pl/sql
Guys i'll be great-full to you if you could help me out or share link or document .

First Read https://forums.oracle.com/forums/ann.jspa?annID=432
Check this link...
1. http://www.devshed.com/c/a/Oracle/Extending-PLSQL-with-Java-Libraries-concluded/
2. calling java from pl/sql in oracle 10g?its very urgent.
3. http://qamarsyed.blogspot.com/2010/07/calling-java-from-plsql-inside-oracle.html
4. http://home.c2i.net/toreingolf/oracle/java_and_plsql.htm
Hope this helps...
If someone response is helpful or correct, please mark it accordingly.

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hi
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dbms_java.grant_permission to
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ORA-06512: at "SANTOSH.SENDMAIL", line 0
ORA-06512: at line 2
In Dbms_java package there is nothing called grant_permission .
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Maybe you should grant JAVASYSPRIV and JAVAUSERPRIV privilege to your db user
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Good luck!
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Santosh Nair ([email protected]):
hi
I have loaded a Java class into Oracle 8.1.6 database. I have created a procedure (call spec) for calling a method in that class.
It takes 3 parameters (Server ip address, From,To). Actually the purpose of the program is to take parameters and send mails
The Java program uses JavaMail. I have loaded all classes required and the class shows status as valid. When I try to execute the method through a pl/sql procedure it gives the following error.
ERROR at line 1:
ORA-29532: Java call terminated by uncaught Java exception:
java.security.AccessControlException: the Permission
(java.util.PropertyPermission * read,write) has not been granted by
dbms_java.grant_permission to
SchemaProtectionDomain(SANTOSH|PolicyTableProxy(SANTOSH))
ORA-06512: at "SANTOSH.SENDMAIL", line 0
ORA-06512: at line 2
In Dbms_java package there is nothing called grant_permission .
What may have gone wrong ???
Thanks<HR></BLOCKQUOTE>
null

Create java class/resource from binary blob in SQL statement

Is there a way of creating a java class or resource from a binary blob in the CREATE JAVA CLASS statement? Something like:
CREATE OR REPLACE JAVA CLASS
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You can load Java classes into the database, then create a PL/SQL procedure or function in the database that calls that Java class.
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Have a look at the database documentation on how to load a Java class: http://download.oracle.com/docs/cd/A91202_01/901_doc/java.901/a90210/toc.htm

Problem when loading simple java class in Oracle

Hi,
I am using loadjava to load the java class in the oracle database. But it is failing. Can some one please help me out with this.
Command.
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PLS-00201: identifier 'DBMS_JAVA.SHORTNAME' must be declared
ORA-06550: line 1, column 7:
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PLS-00201: identifier 'DBMS_JAVA.SHORTNAME' must be declared
ORA-06550: line 1, column 7:
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ORA-29521: referenced name java/lang/Object could not be found
ORA-29521: referenced name java/lang/String could not be found
ORA-29521: referenced name java/lang/StringBuffer could not be found
ORA-29521: referenced name java/lang/System could not be found
loadjava: 7 errors
Please help.
Regards
Sudhir
null

U havent installed JServer in ur DBMS.
Read the Oracle 8i JServer Manual for
manually installing the Oracle JVM.

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I also found a command :
SQL>exec myjava.showobjects
but i don't have the loadjava utility install....is there any command from SQL PLUS?
thanks

Thanks for the sql command....after that query what do I do next to see if for example tree.class is in the dba_object.
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