如何使用Java代码将Sql Server的数据（行）实时复制到MySql中？

Question

I have one GPS tracker device whose data are inserted into Sql Server by Default but problem is I want to create Database in MySql ..

So give suggesttion about how to copy or migrate Data of Sqlserver into MySql in Real time-.

Answer 1

I'm developing the solution that you're asking for. I've added to my build path in eclipse two library:

mysql-connector-java-5.1.18-bin.jar (for MySQL) http://www.mysql.it/downloads/connector/j/

jtds-1.3.0.jar (for MSSQL) http://jtds.sourceforge.net/

If you use Eclipse it's a good idea download SQL Explorer and try the connection under that. The string that you must use for the connections are:

 String url="jdbc:jtds:sqlserver://IP-SERVER:1433/DB";
 String url2="jdbc:mysql://IP-SERVER:3306/DB";

Before than you must pay attention that MySQL and MSSQL accept external connection if you aren't under localhost. For MySQL you must modify in the configuration file the parameter bind that have 127.0.0.1 as default value, change it in 0.0.0.0 (not secure) or with a list of allowed IP. For MSSQL you must be sure that TCP-IP it's enabled and that the defaults ports are 1433.

In java you can easily open two different connection and copy records between different DB. It's a good idea if the data are big use the PreparedStatement that improve the performance if you, for example, need to copy from MSSQL local to MySQL remote. Here a piece of code without exception handler that I've removed for make a message more short.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

java.sql.Statement s;
java.sql.ResultSet rs;
java.sql.Statement s2;
java.sql.ResultSet rs2;
java.sql.PreparedStatement psmtMySQL;

con = DriverManager.getConnection(url, id, pass);
con2 = DriverManager.getConnection(url2, id2, pass2);

if(con!=null && con2!=null){
    try{
s = con.createStatement();
rs = s.executeQuery(sql);        

sql ="INSERT INTO TABLE (FIELD1, FIELD2, FIELD3) " + "VALUES (?,?,?);"; 

con2.setAutoCommit(false);
psmtMySQL = con2.prepareStatement(sql);        
con2.setAutoCommit(true);
while( rs.next() ){
    try {             
        psmtMySQL.setLong(1, rs.getLong("Field1"));
        psmtMySQL.setLong(2, rs.getLong("Field2"));
        psmtMySQL.setString(3, rs.getString("Field3"));
        psmtMySQL.addBatch()    ;
    } catch (SQLException sqle){         
        sqle.printStackTrace();               
    }
}
psmtMySQL.executeBatch();
con2.setAutoCommit(true);
psmtMySQL.close();
rs2.close();
s2.close();
conn2.close();
rs.close();
s.close();
conn.close();

Answer 2

您可以安排一个批处理作业，该作业将使用JDBC（或休眠）从SQL Server读取数据并将其插入MySQL Server。