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JSP--（使用请求转发的动作标识jsp:forward）

發(fā)布時間：2025/3/11 javascript 24 豆豆

生活随笔收集整理的這篇文章主要介紹了 JSP--（使用请求转发的动作标识jsp:forward）小編覺得挺不錯的,現(xiàn)在分享給大家,幫大家做個參考.

版權聲明：To be or not to be, that's a question. https://blog.csdn.net/qq_32823673/article/details/79542554 </div><link rel="stylesheet" href="https://csdnimg.cn/release/phoenix/template/css/ck_htmledit_views-d7e2a68c7c.css"><div class="htmledit_views" id="content_views"><p><jsp:forward>動作標識將當前請求轉發(fā)到其他web資源（HTML頁面、JSP頁面和servlet等）。在執(zhí)行請求轉發(fā)之后當前頁面將不再執(zhí)行，而是執(zhí)行該標識指定的目標頁面。</p><p>login.jsp：</p><pre onclick="hljs.copyCode(event)"><code class="language-html hljs xml"><ol class="hljs-ln" style="width:956px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><<span class="hljs-name">%@</span> <span class="hljs-attr">page</span> <span class="hljs-attr">language</span>=<span class="hljs-string">"java"</span> <span class="hljs-attr">import</span>=<span class="hljs-string">"java.util.*"</span> <span class="hljs-attr">pageEncoding</span>=<span class="hljs-string">"UTF-8"</span>%></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-name">%</span></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-attr">String</span> <span class="hljs-attr">path</span> = <span class="hljs-string">request.getContextPath();</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-attr">String</span> <span class="hljs-attr">basePath</span> = <span class="hljs-string">request.getScheme()+</span>"<span class="hljs-attr">:</span>//"+<span class="hljs-attr">request.getServerName</span>()+"<span class="hljs-attr">:</span>"+<span class="hljs-attr">request.getServerPort</span>()+<span class="hljs-attr">path</span>+"/";</span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag">%></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-meta"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><<span class="hljs-name">html</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">head</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">base</span> <span class="hljs-attr">href</span>=<span class="hljs-string">"<%=basePath%>"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">title</span>></span>My JSP 'login.jsp' starting page<span class="hljs-tag"></<span class="hljs-name">title</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="14"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"pragma"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"no-cache"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="15"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"cache-control"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"no-cache"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="16"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"expires"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"0"</span>></span> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="17"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"keywords"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"keyword1,keyword2,keyword3"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="18"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"description"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"This is my page"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="19"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-comment"><span class="hljs-comment"></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="22"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="23"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">head</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="24"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="25"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">body</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="26"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">from</span> <span class="hljs-attr">action</span>=<span class="hljs-string">""</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="27"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">div</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="28"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="29"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">li</span>></span> <span class="hljs-tag"><<span class="hljs-name">h3</span>></span>用戶登錄<span class="hljs-tag"></<span class="hljs-name">h3</span>></span><span class="hljs-tag"></<span class="hljs-name">li</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="30"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="31"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="32"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">li</span>></span>用戶名：<span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text"</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"usename"</span>></span><span class="hljs-tag"></<span class="hljs-name">li</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="33"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="34"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="35"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="36"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">li</span>></span>密碼：<span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"passward"</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"passward"</span>></span><span class="hljs-tag"></<span class="hljs-name">li</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="37"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="38"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="39"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="40"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">li</span>></span><span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"button"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"登錄"</span>></span><span class="hljs-tag"></<span class="hljs-name">li</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="41"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">ul</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="42"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">div</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="43"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">from</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="44"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">body</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="45"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"></<span class="hljs-name">html</span>></span></div></div></li></ol></code><div class="hljs-button" data-title="復制"></div></pre><p>index.jsp：創(chuàng)建程序的首頁index.jsp，在其中通過<jsp:forward>動作標識將請求轉發(fā)到login.jsp頁面，其關鍵代碼是：<br><span style="background-color:rgb(255,204,204);"><body><br>    您現(xiàn)在位置為：index.jsp!<br>    <jsp:forward page="login.jsp"></jsp:forward><br>  </body>  </span><br></p><pre onclick="hljs.copyCode(event)"><code class="language-html hljs xml"><ol class="hljs-ln" style="width:956px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><<span class="hljs-name">%@</span> <span class="hljs-attr">page</span> <span class="hljs-attr">language</span>=<span class="hljs-string">"java"</span> <span class="hljs-attr">import</span>=<span class="hljs-string">"java.util.*"</span> <span class="hljs-attr">pageEncoding</span>=<span class="hljs-string">"UTF-8"</span>%></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-tag"><<span class="hljs-name">%</span></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-attr">String</span> <span class="hljs-attr">path</span> = <span class="hljs-string">request.getContextPath();</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><span class="hljs-attr">String</span> <span class="hljs-attr">basePath</span> = <span class="hljs-string">request.getScheme()+</span>"<span class="hljs-attr">:</span>//"+<span class="hljs-attr">request.getServerName</span>()+"<span class="hljs-attr">:</span>"+<span class="hljs-attr">request.getServerPort</span>()+<span class="hljs-attr">path</span>+"/";</span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag">%></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-meta"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"><<span class="hljs-name">html</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">head</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">base</span> <span class="hljs-attr">href</span>=<span class="hljs-string">"<%=basePath%>"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">title</span>></span>My JSP 'index.jsp' starting page<span class="hljs-tag"></<span class="hljs-name">title</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"pragma"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"no-cache"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="14"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"cache-control"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"no-cache"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="15"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"expires"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"0"</span>></span> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="16"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"keywords"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"keyword1,keyword2,keyword3"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="17"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">"description"</span> <span class="hljs-attr">content</span>=<span class="hljs-string">"This is my page"</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="18"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-comment"><span class="hljs-comment"></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="21"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">head</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="22"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="23"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">body</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="24"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> 您現(xiàn)在位置為：index.jsp!</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="25"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"><<span class="hljs-name">jsp:forward</span> <span class="hljs-attr">page</span>=<span class="hljs-string">"login.jsp"</span>></span><span class="hljs-tag"></<span class="hljs-name">jsp:forward</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="26"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag"></<span class="hljs-name">body</span>></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="27"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag"></<span class="hljs-name">html</span>></span></div></div></li></ol></code><div class="hljs-button" data-title="復制"></div></pre><br> </div></div>

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