a a a

List totalList = new ArrayList();
Statement stmt=conn.createStatement();
sql="select * from sometable";
rs=stmt.executeQuery(sql);
while(rs.next()){
    List oneElementList = new ArrayList();
    oneElementList.add(rs.getInt(1));
    oneElementList.add(rs.getString(2));
    ......看你有几个columns
    totalList.add(oneElementList);
}

 

 

package custom.dao;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import custom.struts.form.SellerForm;
import custom.struts.form.CustomForm;
import custom.dao.ConnectionManager;

public class SellerDao {
/*针对seller表*/
//1,查询
public static List findAll(Connection conn){
  Statement stmt = null;
  ResultSet rs = null;
  List list = new ArrayList();
  try{
   conn = ConnectionManager.getConnection();
   stmt = conn.createStatement();
   rs = stmt.executeQuery("select * from seller where seller_power='2'");
   while(rs.next()){
    SellerForm sf = new SellerForm();
    sf.setSeller_name(rs.getString("seller_name"));
    sf.setSeller_psw(rs.getString("seller_psw"));
    sf.setSeller_power(rs.getString("seller_power"));
    sf.setSeller_id(rs.getString("seller_id"));
    list.add(sf);
   }  
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.closeConnection(conn);
  }
  return list;
}
public static List findId(String id){
  Connection conn = null;
  Statement stmt = null;
  ResultSet rs = null;
  List list = new ArrayList();
  try{
   stmt = conn.createStatement();
   rs = stmt.executeQuery("select * from seller where seller_id='"+id+"'");
   while(rs.next()){
    SellerForm sf = new SellerForm();
    sf.setSeller_id(rs.getString("seller_id"));
    sf.setSeller_name(rs.getString("seller_name"));
    sf.setSeller_power(rs.getString("seller_power"));
    sf.setSeller_psw(rs.getString("seller_psw"));
    list.add(sf);
   }
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return list;
}
//2,删除
public static int delete(String id){
  Connection conn = null;
  Statement stmt = null;
  int flag = 0;
  try{
   conn = ConnectionManager.getConnection();
   stmt = conn.createStatement();
   flag = stmt.executeUpdate("delete seller where seller_id='"+id+"'");
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return flag;
}
//3,修改
public static int update(String id,String name,String psw){
  Connection conn = null;
  Statement stmt = null;
  int n = 0;
  try{
   stmt = conn.createStatement();
   n = stmt.executeUpdate("update seller set seller_name='"+name+"',seller_psw='"+psw+"' where seller_id="+id);
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return n;
}
//4,插入
public static int insert(String name,String psw){
  Connection conn = null;
  Statement stmt = null;
  int i = 0;
  try{
   stmt = conn.createStatement();
   i = stmt.executeUpdate("insert into seller (select max(seller_id)+1 ,"+name+","+psw+",'2' from seller)");
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return i;
}

//处理登录这个模块
public static String login(String name,String psw,Connection conn){
  Statement stmt = null;
  ResultSet rs = null;
  String power = "";
  try{
   stmt = conn.createStatement();
   rs = stmt.executeQuery("select * from seller where seller_name='"+name+"' and seller_psw='"+psw+"'");
   //如果查询出姓名密码来了就获取权限值
   if(rs.next()){
    power = rs.getString("seller_power");
   }
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return  power;
}
/*针对custom表*/
//1,查询
public static List findAllCustom(Connection conn){
  Statement stmt = null;
  ResultSet rs= null;
  String sql1 = "";
  String sql2 = "";
  List list = new ArrayList();
  try{
   stmt=conn.createStatement();
   sql1 = "select seller_name,customer_name,customer_sex,customer_email,customer_phone ";
   sql2 = "from customer,seller where customer.seller_id=seller.seller_id and customer_state='1'";
   rs = stmt.executeQuery(sql1+sql2);
   while(rs.next()){
    CustomForm c = new CustomForm();
    c.setSeller_name(rs.getString("seller_name"));
    c.setCustomer_name(rs.getString("customer_name"));
    c.setCustomer_sex(rs.getString("customer_sex"));
    c.setCustomer_email(rs.getString("customer_email"));
    c.setCustomer_phone(rs.getString("customer_phone"));
    list.add(c);
   }
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return list;
}
public static List dispaterSeller(Connection conn){
  Statement stmt = null;
  ResultSet rs = null;
  List list = new ArrayList();
  try{
   stmt = conn.createStatement();
   String sql = "select * from seller where seller_power='2'";
   rs = stmt.executeQuery(sql);
   while(rs.next()){
    SellerForm sf = new SellerForm();
    sf.setSeller_name(rs.getString("seller_name"));
    sf.setSeller_id(rs.getString("seller_id"));
    list.add(sf);
   }
  }catch(Exception e){
    e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return list;
}
public static List dispaterCustom(Connection conn){
  Statement stmt = null;
  ResultSet rs = null;
  List list = new ArrayList();
  try{
   stmt = conn.createStatement();
   String sql = "select * from customer where customer_state='0'";
   rs = stmt.executeQuery(sql);
   while(rs.next()){
    CustomForm cf = new CustomForm();
    cf.setCustomer_name(rs.getString("customer_name"));
    cf.setCustomer_id(rs.getString("customer_id"));
    list.add(cf);
   }
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   ConnectionManager.getConnection();
  }
  return list;
}
public static void dispater(String sid,String cid,Connection conn,int count,int i){
  Statement stmt = null;
  try{
   stmt = conn.createStatement();
   stmt.executeUpdate("update customer set seller_id='"+sid+"',customer_state='1' where customer_id ="+cid);
  }catch(Exception e){
   e.printStackTrace();
  }finally{
   if(count==i){
    ConnectionManager.getConnection();
   }
  }
}
}