处理结果集为什么取不出对象呢？添加断点看了一下，处理结果集遍历那部分直接跳过去了？实在是不懂了

public class DeptEditServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String contextPath = request.getContextPath();

        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        out.print("")  ;
        out.print("");
        out.print("");
        out.print("");
        out.print("" );
        out.print("");
        out.print("");
        out.print("
修改部门
");
        out.print("
");
        out.print("
");

        //获取部门编号
        String deptno = request.getParameter("deptno");
        Connection conn =null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            conn = DBUtil.getConnection();
            String sql = "select dname,loc from dept where deptno = ?";
            ps = conn.prepareStatement(sql);
            ps.setString(1,deptno);
            rs = ps.executeQuery();
            if(rs.next()){
              String  dname = rs.getString("dname");
              String loc = rs.getString("loc");
                out.print("部门编号
");
                out.print("部门名称
");
                out.print("部门位置
");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            DBUtil.close(conn,ps,rs);
        }
        out.print("
");
        out.print(""
);
        out.print("");
        out.print("");
    }
}

浏览器那部分该展示的部分也没有显示

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/609105121066194.png "#left")

rs.next()那里？结果没有数据？你还是截图然后圈出来并且附上注释比较好吧

看下这篇博客，也许你就懂了，链接：Servlet的使用你掌握多少？