jspblog : board list firstpage, lastpage, page percent bar

jspblog/src/main/java/com/example/jspblog/domain/board/BoardDao.java

@@ -66,4 +66,25 @@ public class BoardDao {
         }
         return null;
     }
+
+    public int count() {
+        String sql = "select count(*) from board";
+
+        Connection conn = DB.getConnection();
+        PreparedStatement pstmt = null;
+        ResultSet rs = null;
+
+        if (conn != null) {
+            try {
+                pstmt = conn.prepareStatement(sql);
+                rs = pstmt.executeQuery();
+                if (rs.next()) return rs.getInt(1);
+            } catch (Exception e) {
+                e.printStackTrace();
+            } finally {
+                DB.close(conn, pstmt, rs);
+            }
+        }
+        return -1;
+    }
 }

jspblog/src/main/java/com/example/jspblog/service/BoardService.java

@@ -21,4 +21,8 @@ public class BoardService {
     public List<Board> 글목록보기(int page) {
         return boardDao.findAll(page);
     }
+
+    public int 글개수() {
+        return boardDao.count();
+    }
 }

jspblog/src/main/java/com/example/jspblog/web/BoardController.java

@@ -61,7 +61,12 @@ public class BoardController extends HttpServlet {
             case "list" :
                 int page = Integer.parseInt(request.getParameter("page"));
                 List<Board> boards = boardService.글목록보기(page);
+                int boardCount = boardService.글개수();
+                int lastPage = (boardCount - 1) / 4;
+                double currentPosition = (double)page/lastPage*100;
                 request.setAttribute("boards", boards);
+                request.setAttribute("lastPage", lastPage);
+                request.setAttribute("currentPosition", currentPosition);
                 request.getRequestDispatcher("board/list.jsp").forward(request, response);
         }
     }

jspblog/src/main/webapp/board/list.jsp

@@ -16,7 +16,7 @@
     </div>
 
     <div class="progress col-md-12 m-2">
-        <div class="progress-bar" style="width: 70%"></div>
+        <div class="progress-bar" style="width: ${currentPosition}%"></div>
     </div>
 
     <c:forEach var="board" items="${boards}">
@@ -29,8 +29,23 @@
     </c:forEach>
     <br />
     <ul class="pagination justify-content-center">
-        <li class="page-item"><a class="page-link" href="${pageContext.request.contextPath}/board?cmd=list&page=${param.page-1}">Previous</a></li>
+        <c:choose>
-        <li class="page-item"><a class="page-link" href="${pageContext.request.contextPath}/board?cmd=list&page=${param.page+1}">Next</a></li>
+            <c:when test="${param.page le 0}">
+                <li class="page-item disabled"><a class="page-link" href="#">Previous</a></li>
+            </c:when>
+            <c:otherwise>
+                <li class="page-item"><a class="page-link" href="${pageContext.request.contextPath}/board?cmd=list&page=${param.page-1}">Previous</a></li>
+            </c:otherwise>
+        </c:choose>
+        <c:choose>
+            <c:when test="${lastPage == param.page}">
+                <li class="page-item disabled"><a class="page-link" href="#">Next</a></li>
+            </c:when>
+            <c:otherwise>
+                <li class="page-item"><a class="page-link" href="${pageContext.request.contextPath}/board?cmd=list&page=${param.page+1}">Next</a></li>
+            </c:otherwise>
+        </c:choose>
+
     </ul>
 </div>