public void insert() {
		User accounts = new User();
		Map<String, String> item1 = new HashMap<String, String>();//插入一条
		accounts.insert(item1);
		ArrayList<Map<String, String>> list = new ArrayList<Map<String, String>>();
		for (int i = 0; i < 10000; i++) {
			Map<String, String> item = new HashMap<String, String>();
			item.put("username", "admin");
			item.put("password", "123456");
			list.add(item);
		}
		accounts.insert(list);
	}

	public void update() {
		User accounts = new User();
		Map<String, String> data = new HashMap<String, String>();//更新数据
		data.put("username", "admin123");
		Map<String, String> where = new HashMap<String, String>();//查询条件
		where.put("userid", "1");
		boolean flag= accounts.update(data, where);//成功则返回true
		if(flag){
			//更新成功后的业务逻辑
		}else{
			//更新失败后的业务逻辑
		}
	}

	public void select() {
		User accounts = new User();
		ArrayList<String> data = new ArrayList<String>();//你要查询的列的名字,为空则为所有
		data.add("username");
		data.add("password");
		Map<String, String> where = new HashMap<String, String>();//查询条件
		where.put("state", "1");
		ArrayList<Map<String, String>> datalist1=accounts.select(data, where);//查询所有
		ArrayList<Map<String, String>> datalist2=accounts.select(data, where,1,1);//查询所有并分页第一个值为页码第二个为页大小
		ArrayList<Map<String, String>> datalist3=accounts.select(data, where,"userid desc,username desc");//查询排序
		ArrayList<Map<String, String>> datalist4=accounts.select(data, where,1,1,"userid desc,username desc");//查询分页并排序
		Map<String, String> item=accounts.selectone(data, where);//查询一条数据
		for (Map<String, String> map : datalist1) {//遍历出来
			String username=map.get("username");
			String password=map.get("password");
			System.out.println("用户名为:"+username+"密码为:"+password+"\r\n");
		}
	}

	public void delete() {
		User accounts = new User();
		Map<String, String> where = new HashMap<String, String>();//查询条件
		where.put("userid", "1");
		boolean flag= accounts.delete(where);//成功则返回true
		if(flag){
			//删除成功后的业务逻辑
		}else{
			//删除失败后的业务逻辑
		}
	}

public class User extends BaseModel {
	/**
	*若类名与表名一致则无需加入本行，若不一致，则需要加入以下代码
	public User() {
		super("accounts");
	}
	*/
}