Question

好的，所以我有一个奇怪的情况。我基本上创建了之前正在运行的JSP页面，或者至少在Eclipse运行代码时将打开一个新选项卡并显示页面的意义上。但是今天，当我回到我查看我创建的表单时，它基本上会闪烁新选项卡一秒钟，然后自动关闭。我没有在控制台或tomcat日志中出现任何错误，所以我不确定发生了什么。我尝试在同一个项目中创建一个新的JSP文件（没有相同的代码）并正确加载。有没有人有类似问题的经验？

以下是我的代码......

<%@page import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
                <title>Code Selector</title>
        </head>
        <body> 
            <h1>Please select the applicable codes:</h1> 
            <select name='Code' onchange="showState(this.value)">  
            <option value="none">Select a code</option>  
            <%
                //Pulls the ids and decriptions from the codes table and stores them in the first drop down
                try
                {
                    Class.forName("driverName").newInstance();  
                    Connection con = DriverManager.getConnection("serverURL","username","password");  
                    Statement stmt = con.createStatement();  
                    ResultSet rs = stmt.executeQuery("select id, descr from codes");

                    while(rs.next())
                    {
                        %>
                            <option value="<%=rs.getString(1)%>"><%=rs.getString(1)%> <%=rs.getString(2)%></option>  
                        <%
                    }

                    //Closes the database connection
                    stmt.close();
                    con.close();
                }
                catch (ClassNotFoundException e)
                {
                    System.err.println("ClassNotFoundException: " + e.getMessage());
                } 
                catch (SQLException e)
                {
                    System.err.println("SQLException: " + e.getMessage());
                }
                catch (Exception e)
                {
                    System.err.println("Generic Exception: " + e.getMessage());
                }       
            %>
            </select>  
            <br>
            <br>
            <select name='Code2' onchange="showState(this.value)">  
            <option value="none">Select a code</option>  
            <%
                //Pulls the ids and decriptions from the codes table and stores them in the second drop down
                try
                {
                    Class.forName("driverName").newInstance();  
                    Connection con = DriverManager.getConnection("serverURL","username","password");  
                    Statement stmt = con.createStatement();  
                    ResultSet rs = stmt.executeQuery("select id, descr from codes");

                    while(rs.next())
                    {
                        %>
                            <option value="<%=rs.getString(1)%>"><%=rs.getString(1)%> <%=rs.getString(2)%></option>  
                        <%
                    }

                    //Closes the database connection
                    stmt.close();
                    con.close();
                }
                catch (ClassNotFoundException e)
                {
                    System.err.println("ClassNotFoundException: " + e.getMessage());
                } 
                catch (SQLException e)
                {
                    System.err.println("SQLException: " + e.getMessage());
                }
                catch (Exception e)
                {
                    System.err.println("Generic Exception: " + e.getMessage());
                }       
             %>
            </select>
            <br>
            <br>
            <select name='otherCode' onchange="showState(this.value)">  
            <option value="none">Select a other code</option>  
            <%

                //Pulls the ids and decriptions from the other codes table and stores them in the third drop down
                try
                {
                    Class.forName("driverName").newInstance();  
                    Connection con = DriverManager.getConnection("serverURL","username","password");  
                    Statement stmt = con.createStatement();
                    ResultSet rs2 = stmt.executeQuery("select id, descr from other_codes");

                    while(rs2.next())
                    {
                        %>
                            <option value="<%=rs2.getString(1)%>"><%=rs2.getString(1)%> <%=rs2.getString(2)%></option>  
                        <%
                    }

                    //Closes the database connection
                    stmt.close();
                    con.close();
                }
                catch (ClassNotFoundException e)
                {
                    System.err.println("ClassNotFoundException: " + e.getMessage());
                } 
                catch (SQLException e)
                {
                    System.err.println("SQLException: " + e.getMessage());
                }
                catch (Exception e)
                {
                    System.err.println("Generic Exception: " + e.getMessage());
                }       
            %>
      </select>
      <br> 
      <br>
      <form method = "post">
        <input type="submit" value="Submit">
        <%
            try
            {
                String Code = request.getParameter("Code");
                String Code2 = request.getParameter("Code2");
                String otherCode = request.getParameter("otherCode");

                Class.forName("driverName").newInstance();  
                Connection con = DriverManager.getConnection("serverURL","username","password");  
                Statement stmt = con.createStatement();
                //ResultSet rs3 = stmt.executeQuery();

                System.out.println("This is the first code: " + Code);
                System.out.println("This is the second code: " + Code2);
                System.out.println("This is the other code: " + otherCode);

                con.close();
                stmt.close();

            }
            catch (ClassNotFoundException e)
            {
                System.err.println("ClassNotFoundException: " + e.getMessage());
            } 
            catch (SQLException e)
            {
                System.err.println("SQLException: " + e.getMessage());
            }
            catch (Exception e)
            {
                System.err.println("Generic Exception: " + e.getMessage());
            } 
        %>
        <script>
            window.close();
        </script>
      </form>
      </body> 
</html>

Answer 1

这很傻。所以我创建了另一个新的jsp文件，使用相同的代码，除了<script>标签中的代码，一切正常。然后我重新添加了<script>标签，它第一次运行正常。但是，下次我去尝试时，原来的问题又出现了。然后，当我再次删除<script>标记时，问题仍然存在。无论出于何种原因，一旦你添加了window.close()，它就会永久停留在页面上？

JSP页面无法在Eclipse中打开

1 个答案: