即使在后端存储数据后仍保留文本框值 [英] To retain the textbox value even after the data stored in back-end
问题描述
JSP代码：
<％
String aref = request.getParameter（ ArR）;
尝试{
Class.forName（com.mysql.jdbc.Driver）;
java.sql。 Connection con = DriverManager.getConnection（jdbc：mysql：// localhost：3306 / airproject，root，
root）;
ResultSet rs;
语句st = con.createStatement（）;
System.out.println（插入演示值（'+ aref +'））;
st.executeUpdate（插入演示值（'+ aref +'））;
System.out.println（保存记录）;
} catch（ClassNotFoundException e）{
e.printStackTrace（）;
} catch（SQLException e）{
e。 printStackTrace（）;
}
session.setAttribute（结果，注册成功）;
response.sendRedirect（menu0。 jsp）;
％>
HTML代码：
注册
这些代码在后端存储时没有问题。但是当它返回以形成我输入的值时，它应该保留。
提前谢谢
我尝试过：
JSP代码：
<％
String aref = request.getParameter（ArR）;
try {
Class.forName（com.mysql.jdbc.Driver）;
java.sql.Connection con = DriverManager.getConnection（jdbc：mysql：// localhost：3306 / airproject， root，
root）;
ResultSet rs;
语句st = con.createStatement（）;
System.out.println（插入演示值（'+ aref +'））;
st.executeUpdate（插入演示值（'+ aref + '））;
System.out.println（保存记录）;
} catch（ClassNotFoundException e）{
e。 printStackTrace（）;
} catch（SQLException e）{
e.printStackTrace（）;
}
s ession.setAttribute（结果，注册成功）;
response.sendRedirect（menu0.jsp）;
％>
HTML代码：
注册
这些代码在后端存储时没有问题。但当它返回以形成我输入的值时，它应该保留。
提前谢谢
JSP Code:
<%
String aref = request.getParameter("ArR");
try {
Class.forName("com.mysql.jdbc.Driver");
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/airproject", "root",
"root");
ResultSet rs;
Statement st = con.createStatement();
System.out.println("insert into demo values('" + aref + "')");
st.executeUpdate("insert into demo values('" + aref + "')");
System.out.println("Record Saved");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
session.setAttribute("Result", "Registered successfully");
response.sendRedirect("menu0.jsp");
%>
HTML Code:
Registration
These code don't have problem in storing in the back-end. But when it return to back to form the value what i have enter, it should retain.
Thanks in advance
What I have tried:
JSP Code:
<%
String aref = request.getParameter("ArR");
try {
Class.forName("com.mysql.jdbc.Driver");
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/airproject", "root",
"root");
ResultSet rs;
Statement st = con.createStatement();
System.out.println("insert into demo values('" + aref + "')");
st.executeUpdate("insert into demo values('" + aref + "')");
System.out.println("Record Saved");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
session.setAttribute("Result", "Registered successfully");
response.sendRedirect("menu0.jsp");
%>
HTML Code:
Registration
These code don't have problem in storing in the back-end. But when it return to back to form the value what i have enter, it should retain.
Thanks in advance
推荐答案
您必须引入具有更高范围的变量。像类成员（首选）或类似值列表的全局存储。可以存储为cookie吗？
需要一些架构方面的考虑才能找到最佳位置。
You must introduce a variable with a higher scope. Like a class member (prefered) or a global storage like an list of values. Store as cookie possible?
It need some architectural considerations to find the best place.
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