drop procedure if exists sp_update_table_field;
delimiter //
create procedure sp_update_table_field()
begin
if not exists(select 1 from information_schema.columns where table_name='WB_Sys_Role' and column_name='Is_Export') then  
    ALTER TABLE WB_Sys_Role ADD Is_Export TINYINT NOT  NULL default '0';  
end if;
end //

package com.css.wbo.server.tool.initial;
import java.sql.CallableStatement;  
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.SQLException;  
import java.sql.Types;  
public class test {  
    String url = "jdbc:mysql://127.0.0.1:3306/userInfo";   
    String userName = "root";  
    String password = "root";  
    public Connection getConnection() {  
        Connection con=null;  
        try{  
            DriverManager.registerDriver(new com.mysql.jdbc.Driver());  
            con = DriverManager.getConnection(url, this.userName, this.password);  
        }catch(SQLException sw){   
         }  
        return con;  
    }  
    public void testProc(){  
        Connection conn = getConnection();  
        CallableStatement stmt = null;  
        try{  
            stmt = conn.prepareCall("{call sp_update_table_field}");
            stmt.execute();  
        }catch(Exception e){  
            System.out.println("hahad = "+e.toString());  
        }finally{  
            try {  
                stmt.close();  
                conn.close();  
            }catch (Exception ex) {  
                System.out.println("ex : "+ ex.getMessage());  
            }  
        }  
    }  
    public static void main(String[] args) {  
        new test().testProc();  
    }  
}  

 java.sql.Statement ps = conn.createStatement();
 String sql = sqlSB.toString();
 ToolLog.getLog().debug(sql);
  ps.execute(sql);