获取MySQL安装路径

Question

我需要获取MySQL的安装路径,以便通过java代码执行导出和导入数据库.目前正在使用eclipse.我需要在String变量"mySqlPath"中获取安装路径.

File fMysqlPath = new File("C:\\Program Files\\MySQL\\MySQL Server 5.1\\bin\\");
String executeCmd = "mysqldump -u " + Constants.DB_USER + " -p" + 
                    Constants.DB_PASSWORD + " " + Constants.DB_NAME + " -r " + 
                    FilePath + "\\" + FileName;
Process runtimeProcess = Runtime.getRuntime().exec(executeCmd, null, fMysqlPath);

这就是我所做的.这有依赖性问题.

我怎么解决这个问题？

Answer 1

你试过这个:

import java.sql.*;
import javax.sql.*;

public class MysqlPathFinderDemo{

public static void main(String args[]){
String dbtime;
String dbUrl = "jdbc:mysql://your.database.domain/yourDBname";
String dbClass = "com.mysql.jdbc.Driver";
String query = "Select * FROM users";

try {

      Class.forName("com.mysql.jdbc.Driver");
      Connection con = DriverManager.getConnection (dbUrl);
      Statement stmt = con.createStatement();
      res = Myconnection.st.executeQuery("select @@datadir");
      String Mysqlpath = "";

      while(res.next()){
          Mysqlpath=res.getString(1) ;
      }

      Mysqlpath = Mysqlpath.replace("Data", "bin"); 
      System.err.println("Mysql path is :"+a);
   } catch(Exception ee) {
   }
 }
}

Answer 2

可以直接查询mysql，问自己给你路径：

SHOW VARIABLES LIKE 'basedir';

或者更容易，

SELECT @@basedir;

应该给你安装路径。两者都应该导致类似的结果：

C:\Program Files\MySQL\MySQL Server 5.1\

datadir 相当于获取数据目录的路径（数据所在的位置）。