修复所有数据库性能问题

WebRoot/edit_admin.jsp

@@ -33,9 +33,7 @@
 			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);
 		%>
 
 
@@ -48,7 +46,9 @@
 			<div class="col-sm-12 col-lg-9 col-md-9">
 			<%
 								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 where AdminName=?");
@@ -83,6 +83,10 @@
 					</div>
 					<%
 								}
+								sql.close();
+									rs.close();
+									conn.close();
+									stmt.close();
 								} catch (Exception ex) {
 									ex.printStackTrace();
 								}
@@ -93,7 +97,9 @@
 							<select name="job" class="form-control" name="job">
 								<%
 									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 administrator_job");
@@ -103,14 +109,16 @@
 								<option value="<%=rs.getString("AdminJob")%>"><%=rs.getString("AdminJob")%></option>
 								<%
 									}
+									sql.close();
+									rs.close();
+									conn.close();
+									stmt.close();
 									} catch (Exception ex) {
 										ex.printStackTrace();
 									}
 								%>
 								<%
-									sql.close();
-									rs.close();
-									conn.close();
+									
 								%>
 							</select>
 						</div>