jsp數據顯示分頁

時間 2019-11-25

標籤 jsp 數據顯示分頁欄目 JSP 简体版

原文原文鏈接

從數據庫得到數據就不寫了，直接寫如何進行分頁，爲了方便，把方法和實體類都寫到一個java文件裏面了css

這只是一種簡單的分頁方法，肯能會有比較多的bugjava

這是java裏的構造實體類和方法，數據庫

 1 public class PageUtilServices {
 2 
 3          private int pageSize;//每頁顯示的條數
 4         private int recordCount;//總共的條數
 5         private int currentPage;//當前頁面
 6         //構造方法
 7         public PageUtilServices(int pageSize, int recordCount, int currentPage) {
 8             super();
 9             this.pageSize = pageSize;
10             this.recordCount = recordCount;
11             this.currentPage = currentPage;
12         }
13         public PageUtilServices() {
14             super();
15         }
16           
17             //總頁數
18             public int getPageCount() {
19                 int size = recordCount/pageSize;//總條數/每頁顯示的條數=總頁數
20                 int mod = recordCount % pageSize;//最後一頁的條數
21                 if(mod != 0)
22                     size++;
23                 return recordCount == 0 ? 1 : size;
24             }
25             //當前頁的起始索引爲0
26             public int getFromIndex() {
27                 return (currentPage-1) * pageSize;
28             }
29             //當前頁應展現的最後索引
30             public int getToIndex() {
31                 return  Math.min(recordCount, currentPage * pageSize);
32             }
33            
34             public int getCurrentPage() {
35                 return currentPage;
36             }
37             public void setCurrentPage(int currentPage) {
38                
39                 this.currentPage = currentPage;
40             }
41             public int getPageSize() {
42                 return pageSize;
43             }
44             public void setPageSize(int pageSize) {
45                 this.pageSize = pageSize;
46             }
47             public int getRecordCount() {
48                 return recordCount;
49             }
50             public void setRecordCount(int recordCount) {
51                 this.recordCount = recordCount;
52             }
53 }

這是jsp界面jsp

<style type="text/css">
        table{
            margin: 0 auto;
            border-collapse:collapse;
            border-color: #666;
        }
        .lowstore{
            color:red;
        }
        td{
            text-align: center;
        }
    </style>
  </head>
  
  <body>
  <table border="1px">
  <%

  BookInfoDao dao = new BookInfoDao();
  List<Books> bookList = dao.showBooks();
  String pageStr = request.getParameter("page");
  int currentPage = 1;
  if (pageStr==null){  
      currentPage = 1;
  }else if(Integer.parseInt(pageStr)<=0){
      currentPage = 1;
  }else if(Integer.parseInt(pageStr)>bookList.size()/3){
      currentPage =bookList.size()/3+1;
  }else{
      currentPage=Integer.parseInt(pageStr);
  }
  PageUtilServices pUtil = new PageUtilServices(3, bookList.size(), currentPage);
  currentPage = pUtil.getCurrentPage();
  
  
      BookInfoDao bd=new BookInfoDao();
    //ArrayList<Books> books=bd.showBooks();
    
    if(bookList.isEmpty()==false){ %>
    
      <tr bgcolor="#eeeeee" colspan=13 align="center" >
          <td>編號</td>
          <td>名稱</td>
          <td>做者</td>
          <td>價格</td>
          <td>發佈日期</td>
          <td>庫存</td>
          <td>操做</td>
          <td>修改</td>
          <td>入庫</td>
          <td>出庫</td>
          <td>評論</td>
          <td>查看評論</td>
          <td>購買圖書</td>
      </tr>
    <%
        
            SimpleDateFormat sf=new SimpleDateFormat("yyyy-MM-dd");
            //ArrayList<Books> bookList=bd.showBooks();
            %>
            <a href="addbooks.jsp">添加圖書</a><br/>
            <a href="searchbook.jsp">查找圖書</a><br/>
            <a href="userlist.jsp?id=3">查看用戶</a><br/>
            <a href="login.jsp">返回登陸</a>
            
            <%
            for (int i = pUtil.getFromIndex(); i < pUtil.getToIndex(); i++) {
                 Books book = bookList.get(i);
                
                %>
                <tr class=<%=bookList.get(i).getReserve()<10?"lowstore":""%>>
                      <td><%=bookList.get(i).getBookId() %></td>
                      <td><%=bookList.get(i).getBookName() %></td>
                      <td><%=bookList.get(i).getAuther() %></td>
                      <td><%=bookList.get(i).getPrice() %></td>
                      <td><%=sf.format(bookList.get(i).getBookTime()) %></td>
                      <td><%=bookList.get(i).getReserve() %></td>
                      <td><a href="servlet/do_bookdelServlet?id=<%=bookList.get(i).getBookId() %>">刪除</a></td>
                      <td><a href="servlet/do_updatebookServlet?id=<%=bookList.get(i).getBookId() %>">修改</a></td>
                      <td><a href="servlet/do_inbooksServlet?id=<%=bookList.get(i).getBookId() %>">入庫</a></td>
                      <td><a href="servlet/do_outbooksServlet?id=<%=bookList.get(i).getBookId() %>">出庫</a></td>
                      <td><a href="addcomment.jsp?id=<%=bookList.get(i).getBookId() %>">評論</a></td>
                      <td><a href="servlet/do_showcomServlet?id=<%=bookList.get(i).getBookId() %>">查看評論</a></td>
                      <td><a href="servlet/do_sellbookServlet?id=<%=bookList.get(i).getBookId() %>">購買</a></td>
                  </tr>                  
        <%    }
        }else{
            %>
            <tr>
                <td>對不起，沒有圖書收錄，請添加！</td>
            </tr>
            <a href="addbooks.jsp">添加</a><br/>
              <a href="login.jsp">返回登陸</a>
    <%    }
        %>    
                <tr><td bgcolor="#eeeeee" colspan=13 align="center">
                    記錄總數<%=pUtil.getRecordCount()%>條 當前頁/總頁數<%=currentPage%>
                    /<%=pUtil.getPageCount()%> 每頁顯示<%=pUtil.getPageSize()%>條
                    <a href="booklist.jsp?page=1">首頁</a>
                    <a href="booklist.jsp?page=<%=(currentPage - 1)%>">上頁</a>
                    <a href="booklist.jsp?page=<%=(currentPage + 1)%>">下頁</a>
                    <a href="booklist.jsp?page=<%=pUtil.getPageCount()%>">末頁</a>
                    </td></tr>

  </table>
  
 
  </body>