JDBC 使用这个是MySQL下的

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MysqlJDBC {
 
 @SuppressWarnings("rawtypes")
 public static List<Map> findsql(String sql){
    Connection conn = null;
    Statement stmt = null;
    ResultSet rs = null;
         try {
           //第一步：加载MySQL的JDBC的驱动
              Class.forName("com.mysql.jdbc.Driver");
            //取得连接的 url,能访问MySQL数据库的用户名,密码；数据库名
           String url = "jdbc:mysql://192.168.1.10:3306/shaimei";
           String user = "cpdmembers";
           String password = "cpdmembers";
           //第二步：创建与MySQL数据库的连接类的实例
           conn = DriverManager.getConnection(url, user, password);
           //第三步：用conn创建Statement对象类实例 stmt
           stmt = conn.createStatement();
           //第四步：执行查询，用ResultSet类的对象，返回查询的结果
           //String sql = "select * from rerule";
           rs = stmt.executeQuery(sql);
           List<Map> list = new ArrayList<Map>();
           while(rs.next()){
               Map<String, Object> map = new HashMap<String, Object>(); 
            ResultSetMetaData rsmd = rs.getMetaData(); 
            int count = rsmd.getColumnCount();  
            for(int i=1;i<count;i++){
             String key = rsmd.getColumnLabel(i); 
             Object value = rs.getObject(i) ;
                map.put(key, value);
             
                list.add(map);
            }
            System.out.println(list); //取得数据库中的数据
            return list;
               
           }
         } catch (ClassNotFoundException e) { 
         //加载JDBC错误,所要用的驱动没有找到
          System.out.println("驱动加载错误");
   }catch (SQLException ex) {
     //显示数据库连接错误或查询错误
     System.err.println("SQLException:"+ex.getMessage());
   }finally {
         try{
          if(rs != null) {
           rs.close();
           rs = null;
          }
          if(stmt != null) {
           stmt.close();
           stmt = null;
          }
          if(conn != null) {
           conn.close();
           conn = null;
          }
         }catch(SQLException e) {
          System.err.println("SQLException:"+e.getMessage());
         }
    }
  return null;
  }
 public static void main(String[] args) {
  //MySQL访问包：http://download.csdn.net/detail/u010696272/8006839
  System.out.println(findsql("select * from rerule"));
 }
}