spring对JDBC整合的时候，要注意自己写一个映射，继承RowMapper,查询的时候会用到，将返回的ResultSet一条对应一个Employee对象。

package db.mapping;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import db.bean.Employee;

public class EmployeeMapper implements RowMapper {

    @Override
    public Object mapRow(ResultSet rs, int arg1) throws SQLException {
        // TODO Auto-generated method stub
        Employee emp = new Employee();
        emp.setId(rs.getInt(1));
        emp.setName(rs.getString(2));
        emp.setDept_id(rs.getInt(3));
        return emp;
    }

}