public class DBBean {
  private Connection con;

  private PreparedStatement pstmt;
  private ResultSet rs;
  private String dbName ="test";
  private String dbuser = "root";
  private String dbpass ="******";
  
  static{
    try{
      Class.forName("com.mysql.jdbc.Driver");
    }catch(ClassNotFoundException e){
      System.out.println(e);
    }
    
  }
  
  public void prepareConnection(){
    try{
      con=DriverManager.getConnection("jdbc:mysql://localhost:3306/"+dbName,dbuser,dbpass);
    }catch(SQLException e){
      System.out.println(e);
    }
  }
  //关闭连接
  public void close(){
      try {
        if(con!=null)
          con.close();
      } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      con = null;
      try {
        if(pstmt!=null)
          pstmt.close();
      } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      pstmt = null;
  }
  //设置参数
  private void setParems(String[] parems){
    if(parems!=null){
      for(int i=0;i<parems.length;i++){
        try {
          pstmt.setString(i+1, parems[i]);
        } catch (SQLException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
      }
    }
  }
  public ResultSet executeQuery(String sql,String[] parems){
    ResultSet res = null;
    prepareConnection();
    try {
      pstmt = con.prepareStatement(sql);
      setParems(parems);
      res = pstmt.executeQuery();
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }finally{
     }
    return res;
  }
}

public class StudentBean {
  private long id;
  private String name;
  private String phone;
  private int age;
  private int score;
  public long getId() {
    return id;
  }
  public void setId(long id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getPhone() {
    return phone;
  }
  public void setPhone(String phone) {
    this.phone = phone;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public int getScore() {
    return score;
  }
  public void setScore(int score) {
    this.score = score;
  }
}

public class StudentDao implements StudentDaoIn {
@Override 
public ArrayList<StudentBean> findByPage(int page){
    DBBean db = new DBBean();
    int begin = (page-1) * 5;
    String sql = "select * from t_student limit "+begin+",5";
    ResultSet rs = db.executeQuery(sql,null);
    ArrayList<StudentBean> list = new ArrayList<StudentBean>();
    try {
      while(rs.next()){
        StudentBean st = new StudentBean();
        st.setName(rs.getString("name"));
        st.setAge(rs.getInt("age"));
        st.setId(rs.getInt("id"));
        st.setPhone(rs.getString("phnoe"));
        st.setScore(rs.getInt("score"));
        list.add(st);
      }
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    return list;
  }
  @Override 
  public int userCount(){
    DBBean db = new DBBean();
    String sql = "select count(*) from t_student";
    ResultSet rs = db.executeQuery(sql, null);
    int count = 0;
    try {
      rs.next();
      count = rs.getInt(1);
    } catch (SQLException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    return count;
  }
}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    String page = null;
    page = request.getParameter("page");
    if(page == null || page=="")
      page = "1";
    StudentDao studao = new StudentDao();
    request.setAttribute("student",studao.findByPage(Integer.parseInt(page)));
    request.setAttribute("pagenum",studao.userCount()/5+1);//总页数
    request.setAttribute("page", page);//当前页
    request.getRequestDispatcher("student.jsp").forward(request, response);  
    
  }

<table id="t_stu" border="1" cellpadding="2" cellspacing="0">
  <thead>
    <tr>
      <th>ID</th>
      <th>姓名</th>
      <th>年龄</th>
      <th>电话</th>
      <th>成绩</th>
    </tr>
  </thead>
  <c:forEach items="${student}" var="st">
    <tr>
      <td>${st.getId()}</td>
      <td>${st.getName()}</td>
      <td>${st.getAge()}</td>
      <td>${st.getPhone()}</td>
      <td>${st.getScore()}</td>
    </tr>
  </c:forEach>
</table>
<br>
共 ${pagenum}页  当前 第${page}页 
<c:choose>
  <c:when test="${page>1}">
    <a href="getSutent?page=${page-1}" rel="external nofollow" ><input type="button" value="上一页" ></a>
  </c:when>
  <c:otherwise>
    <input type="button" value="上一页" disabled="disabled" />
  </c:otherwise>
</c:choose>
<c:choose>
  <c:when test="${page!=pagenum}">
    <a href="getSutent?page=${page+1}" rel="external nofollow" ><input type="button" value="下一页"></a>
  </c:when>
  <c:otherwise>
    <input type="button" value="下一页" disabled="disabled" />
  </c:otherwise>
</c:choose>