修复所有数据库性能问题

WebRoot/show_admin.jsp

@@ -55,11 +55,11 @@
 									String url = "jdbc:mysql://localhost:3306/db_school?useUnicode=true&characterEncoding=utf-8";
 									String user = "root";
 									String password = "";
-									ResultSet rs = null;
-									Connection conn = null;
-									PreparedStatement sql = null;
+									Class.forName(driverClass);
 									try {
-										Class.forName(driverClass);
+										ResultSet rs = null;
+										Connection conn = null;
+										PreparedStatement sql = null;
 										conn = DriverManager.getConnection(url, user, password);
 										Statement stmt = conn.createStatement();
 										sql = conn.prepareStatement("select * from adminstrator_record");
@@ -75,14 +75,16 @@
 								</tr>
 								<%
 									}
+										sql.close();
+										rs.close();
+										conn.close();
+										stmt.close();
 									} catch (Exception ex) {
 										ex.printStackTrace();
 									}
 								%>
 <%
-			sql.close();
-			rs.close();
-			conn.close();
+			
 		%>
 							</table>
 						</div>
@@ -121,7 +123,10 @@
 													</tr>
 													<%
 														try {
-															Class.forName(driverClass);
+															ResultSet rs = null;
+															Connection conn = null;
+															PreparedStatement sql = null;
+												
 															conn = DriverManager.getConnection(url, user, password);
 															Statement stmt = conn.createStatement();
 															sql = conn.prepareStatement("select * from admin_view");
@@ -137,6 +142,10 @@
 													</tr>
 													<%
 														}
+															sql.close();
+															rs.close();
+															conn.close();
+															stmt.close();
 														} catch (Exception ex) {
 															ex.printStackTrace();
 														}
@@ -158,9 +167,7 @@
 			</div>
 		</div>
 		<%
-			sql.close();
-			rs.close();
-			conn.close();
+			
 		%>
 		<%@ include file="module/footer.jsp"%>
 	</div>