ResultSet转List

Role是一个实体类，传进来的sql，查询的是rule_id和rule_name两个字段，所以要指定一下具体的值

Role role = new Role();
role.setId(rs.getInt("role_id"));
role.setName(rs.getString("role_name"));

完整代码如下：
 

public static Connection getConnectionByJDBC() {
        Connection conn = null;
        try { // 装载驱动类
            Class.forName("oracle.jdbc.driver.OracleDriver");
        } catch (ClassNotFoundException e) {
            System.out.println("装载驱动异常！");
            e.printStackTrace();
        }
        try { // 建立JDBC连接
            conn = DriverManager.getConnection(
                    "jdbc:oracle:thin:@192.168.0.3:1521:test", "test",
                    "test");
        } catch (SQLException e) {
            System.out.println("链接数据库异常！");
            e.printStackTrace();
        }
        return conn;
    }

public static List findByUserCodeAndDeptCode(String hql) {
        Connection conn = getConnectionByJDBC();
        List roleList = new ArrayList();
        try { // 创建一个JDBC声明
            Statement stmt = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,
                    ResultSet.CONCUR_READ_ONLY);
            // 执行查询
            ResultSet rs = stmt.executeQuery(hql);
            while (rs.next()) {
                Role role = new Role();
                role.setId(rs.getInt("role_id"));
                role.setName(rs.getString("role_name"));
                roleList.add(role);
            }
            //insert ,update ,delete用executeUpdate方法
        } catch (SQLException e) {
            System.out.println(e.getMessage());
            e.printStackTrace();
        } finally {
            // 预防性关闭连接(避免异常发生时在try语句块关闭连接没有执行)
            try {
                if (conn != null)
                    conn.close();
            } catch (SQLException e) {
                System.out.println(e.getMessage());
                e.printStackTrace();
            }
        }
        return roleList;
    }