Category Archives: mysql

run linux command from java and reading result?

import java.*; class Test { public static void main(String[] args) { int ch; try { Process myProcess = Runtime.getRuntime().exec(“ls -al”); InputStreamReader myIStreamReader = new InputStreamReader(myProcess.getInputStream()); while ((ch = != -1) { System.out.print((char) ch); } } catch (IOException anIOException) { … Continue reading

Posted in java, mysql

restarting mysql at linux

service mysql restart

Posted in linux, mysql

SqlExecuter vs JDBC

public class CmdExec { public static void main(String argv[]) { executeSql(); } private static void executeSql() { final class SqlExecuter extends SQLExec { public SqlExecuter() { Project project = new Project(); project.init(); setProject(project); // setTaskType(“sql”); setTaskName(“sql”); } } SqlExecuter executer … Continue reading

Posted in java, jdbc, mysql

how to get last insert id by java

public static int getLastInsertID(Connection conn, String statment)throws SQLException { int lastInsertedId = -1; PreparedStatement ps = conn.prepareStatement(statment,PreparedStatement.RETURN_GENERATED_KEYS); ps.executeUpdate(); ResultSet rskey = ps.getGeneratedKeys(); if (rskey != null && { lastInsertedId = rskey.getInt(1); } return lastInsertedId; }

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How to find and replace in mysql

To find a string in a certain field and replace it with another string: update [table_name] set [field_name] = replace([field_name],'[string_to_find]’,'[string_to_replace]’);   update `wp_posts` set `post_content` = replace(`post_content`,’http://localhost/elrashd/holding/’,’’)

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unknown-table-engine-innodb   I was getting the error “ERROR 1286 (42000): Unknown table engine ‘InnoDB’” when trying to create/alter tables with the InnoDB engine. You can check for this warning by issuing the create or alter statements and then running show … Continue reading

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