程式師世界 >> 編程語言 >> 更多編程語言 >> 編程綜合問答 >> javaweb-關於空格，有空格就報500錯誤，沒有空格就不報錯，這是什麼原因

javaweb-關於空格，有空格就報500錯誤，沒有空格就不報錯，這是什麼原因

編輯：編程綜合問答

關於空格，有空格就報500錯誤，沒有空格就不報錯，這是什麼原因

SQL SERVER 2008 和SQLSERVER2008，前者形式在下面代碼中運行會出錯，後者不報500，這是什麼原因？求大神指點
Books.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

Insert title here

Book Pages

<a href="book.jsp?book=JavaWeb">JavaWeb</a><br><br>
<a href="book.jsp?book=JSP">JSP</a><br><br>
<a href="book.jsp?book=html5">html5</a><br><br>
<a href="book.jsp?book=SQLSERVER2008">SQLSERVER2008</a><br><br>
<a href="book.jsp?book=Struts2">Struts2</a><br><br>
<a href="book.jsp?book=Spring">Spring</a><br><br>
<a href="book.jsp?book=Oracle">Oracle</a><br><br>
<a href="book.jsp?book=XML">XML</a><br><br>
<a href="book.jsp?book=HTML">HTML</a><br><br>
<a href="book.jsp?book=JavaScript">JavaScript</a><br><br>
<br><br>

<%
    //顯示最近浏覽的五本書
    //獲取所有的cookie
    Cookie[] cookies = request.getCookies();
    //從中篩選出book的cookie,如果cookieName為ATGUIGU_BOOK_開頭即符合條件
    //顯示CookieValue
    if(cookies != null && cookies.length > 0){
        for(Cookie c:cookies){
            String cookieName = c.getName();
            if(cookieName.startsWith("ATGUIGU_BOOK_")){
                out.println(c.getValue());
                out.println("<br>");
            }
        }
    }

%>

Book.jsp
<%@page import="java.util.ArrayList"%>
<%@page import="java.util.List"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

Insert title here

<h4>Book Detail Page</h4>

Book:<%=request.getParameter("book") %>
<br><br>

<a href="books.jsp">return</a>



<%
    String book = request.getParameter("book");
    //把書的信息以cookie的方式傳回給浏覽器，刪除一個cookie
    //1.確定要被刪除的一個cookie
    //前提:ATGUIGU_BOOK_開頭的cookie數量大於或等於5，
    Cookie[] cookies = request.getCookies();

    //用來保存所有以ATGUIGU_BOOK_開頭的BOOK的cookie信息
    List<Cookie> bookCookies = new ArrayList<Cookie>();
    //用來保存和books.jsp傳入的book匹配的那個cookie
    Cookie tempCookie = null;

    if(cookies != null && cookies.length > 0){
        for(Cookie c:cookies){
            String cookieName = c.getName();
            if(cookieName.startsWith("ATGUIGU_BOOK_")){
                bookCookies.add(c);

                if(c.getValue().equals(book)){
                    tempCookie = c;
                }
            }
        }
    }
    //(1)且若從books.jsp頁面傳入的book不在ATGUIGU_BOOK_的cookie中則刪除較早的那個cookie
    //(ATGUIGU_BOOK_數組的第一個cookie)
    if(bookCookies.size() > 5 && tempCookie == null){
        tempCookie = bookCookies.get(0);
    }
    //(2)若在其中則刪除該cookie
    if(tempCookie != null){
        tempCookie.setMaxAge(0);
        response.addCookie(tempCookie);
    }
    //2.把從books.jsp頁面傳入的book作為一個cookie返回
    Cookie cookie = new Cookie("ATGUIGU_BOOK_" + book,book);
    response.addCookie(cookie);
%>