JDBC 链接远程mysql服务器

一、设置远程mySql受权
在mysql命令行中受权代码：

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'124.94.194.195' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
其中：
myuser 表示访问mysql的本地用户（能够随便写，不须要本地建立）;
124.94.194.195 表示本地计算机的IP公网地址;
mypassword 表示访问mysql的本地密码（能够随便写，不须要本地建立）;

JDBC链接代码：
对于JDBC代码只须要改动开头声明就能够：

private final String dbDrive="com.mysql.jdbc.Driver";
    private final String url = "jdbc:mysql://124.94.194.195:3306/须要访问的数据库名";
    private final String userName = "myuer";
    private final String password = "myPassword";
    private Connection con = null;

如图为JDBC完整代码：

package ldxy.xxxy;//此处需改为本身的包名
import java.sql.*;
public class JDBConnection {
    private final String dbDrive="com.mysql.jdbc.Driver";
    private final String url = "jdbc:mysql://124.94.194.195:3306/须要访问的数据库名";
    private final String userName = "myuer";
    private final String password = "myPassword";
    private Connection con = null;
//经过构造方法加载数据库驱动
    public JDBConnection() {
        try {
            Class.forName(dbDrive).newInstance(); 
        } catch (Exception ex) {
            System.out.println("数据库加载失败");
        }
    }
//建立数据库链接
    public boolean creatConnection() {
        try {
            con = DriverManager.getConnection(url, userName, password);
            con.setAutoCommit(true);        
} catch (SQLException e) {
            System.out.println(e.getMessage());
            System.out.println("creatConnectionError!");
        }
        return true;
    }
//对数据库的增长、修改和删除的操做
    public boolean executeUpdate(String sql) {
         if (con == null) {
            creatConnection();
        }
        try {
            Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
            int iCount = stmt.executeUpdate(sql);
            System.out.println("操做成功，所影响的记录数为" + String.valueOf(iCount));
            return true;
        } catch (SQLException e) {
            System.out.println(e.getMessage());
            return false;
        }   
    }
//对数据库的查询操做
    public ResultSet executeQuery(String sql) {
        ResultSet rs;
        try {
            if (con == null) {
                creatConnection();
            }
            Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
            try {
                rs = stmt.executeQuery(sql);
            } catch (SQLException e) {
                System.out.println(e.getMessage());
                return null;
            }
        } catch (SQLException e) {
            System.out.println(e.getMessage());
            System.out.println("executeQueryError!");
            return null;
        }
        return rs;
    }
    //关闭数据库
    public void  closeConnection(){
        if(con==null){
            try {
                con.close();
            } catch (SQLException e) {
            // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}