{"id":264993,"date":"2024-05-15T15:56:23","date_gmt":"2024-05-15T07:56:23","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/264993.html"},"modified":"2024-05-15T15:56:28","modified_gmt":"2024-05-15T07:56:28","slug":"jsp-%e9%a1%b9%e7%9b%ae%e4%b8%ad%e6%80%8e%e4%b9%88%e6%89%a7%e8%a1%8c-javascript-%e4%bb%a3%e7%a0%81-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/264993.html","title":{"rendered":"jsp \u9879\u76ee\u4e2d\u600e\u4e48\u6267\u884c javascript \u4ee3\u7801"},"content":{"rendered":"

\"jsp<\/p>\n

\u5728JSP\u9879\u76ee\u4e2d\u6267\u884cJavaScript\u4ee3\u7801\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728JSP\u9875\u9762\u4e0a\u5185\u5d4cJavaScript\u4ee3\u7801\u3001\u6216\u5728JSP\u6587\u4ef6\u5185\u901a\u8fc7Java\u65b9\u6cd5\u52a8\u6001\u751f\u6210\u5e76\u6ce8\u5165JavaScript\u4ee3\u7801\u6765\u5b9e\u73b0\u3002\u9996\u5148\uff0c\u53ef\u4ee5\u5c06JavaScript\u4ee3\u7801\u76f4\u63a5\u5199\u5728JSP\u9875\u9762\u7684HTML\u7ed3\u6784\u4e4b\u5185\uff0c\u8fd9\u6837\u5f53HTML\u9875\u9762\u88ab\u6d4f\u89c8\u5668\u52a0\u8f7d\u65f6\uff0cJavaScript\u4ee3\u7801\u4e5f\u4f1a\u968f\u4e4b\u6267\u884c\uff1b\u5176\u6b21\uff0c\u53ef\u901a\u8fc7\u670d\u52a1\u5668\u7aef\u63a7\u5236\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u542b\u6709JavaScript\u4ee3\u7801\u7684\u54cd\u5e94\uff0c\u7528\u6765\u6539\u53d8\u9875\u9762\u5185\u5bb9\u3001\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92\u3001\u6216\u6267\u884c\u5ba2\u6237\u7aef\u811a\u672c\u7b49\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\u5c06\u8be6\u7ec6\u63cf\u8ff0\u5982\u4f55\u5185\u5d4cJavaScript\u4ee3\u7801\u5230JSP\u9875\u9762\u4e2d\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5185\u5d4cJavaScript<\/h2>\n<\/p>\n

\u5728JSP\u9875\u9762\u5185\u90e8\uff0c\u53ef\u4ee5\u901a\u8fc7<script><\/code>\u6807\u7b7e\u76f4\u63a5\u7f16\u5199JavaScript\u4ee3\u7801\u3002\u8fd9\u79cd\u65b9\u6cd5\u7c7b\u4f3c\u4e8e\u5728\u666e\u901aHTML\u6587\u4ef6\u4e2d\u6dfb\u52a0JavaScript\u3002<\/p>\n<\/p>\n

\u4f8b\u5982\uff1a<\/strong><\/p>\n<\/p>\n

<script type="text\/javascript"><\/p>\n
    function showAlert() {<\/p>\n
        alert('Hello from JSP!');<\/p>\n
    }<\/p>\n
<\/script><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3ashowAlert<\/code>\u7684JavaScript\u51fd\u6570\uff0c\u5f53\u9875\u9762\u52a0\u8f7d\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u7f51\u9875\u4e0a\u7684\u6309\u94ae\u6216\u5176\u4ed6\u4e8b\u4ef6\u89e6\u53d1\u5668\u6765\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u3002<\/p>\n<\/p>\n
\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\uff1a<\/strong><\/p>\n<\/p>\n
JavaScript\u4ee3\u7801\u7247\u6bb5\u53ef\u4ee5\u8bbe\u7f6e\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u4ee5\u4fbf\u5728\u7528\u6237\u4e0e\u7f51\u9875\u8fdb\u884c\u4ea4\u4e92\u65f6\u89e6\u53d1JavaScript\u51fd\u6570\u3002<\/p>\n<\/p>\n
<button type="button" onclick="showAlert()">Click Me!<\/button><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u70b9\u51fb\u6309\u94ae\u65f6\uff0c\u4f1a\u6267\u884cshowAlert<\/code>\u51fd\u6570\u5e76\u663e\u793a\u4e00\u4e2a\u5f39\u7a97\u3002<\/p>\n<\/p>\n
\u4e8c\u3001JSP\u6807\u7b7e\u4e0eJavaScript\u7ed3\u5408<\/h2>\n<\/p>\n
JSP\u6807\u7b7e\u53ef\u4ee5\u548cJavaScript\u7ed3\u5408\u4f7f\u7528\uff0c\u52a8\u6001\u6ce8\u5165\u811a\u672c\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/strong><\/p>\n<\/p>\n
<%<\/p>\n
    String name = request.getParameter("name");<\/p>\n
%><\/p>\n
<script type="text\/javascript"><\/p>\n
    var userName = "<%= name %>";<\/p>\n
    if (userName) {<\/p>\n
        alert('Welcome, ' + userName);<\/p>\n
    }<\/p>\n
<\/script><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4ece\u8bf7\u6c42\u4e2d\u83b7\u53d6\u4e86\u540d\u4e3aname<\/code>\u7684\u53c2\u6570\uff0c\u5e76\u5728JavaScript\u4ee3\u7801\u4e2d\u4f7f\u7528\u8be5\u53c2\u6570\u503c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u5728JSP\u4e2d\u4f7f\u7528\u5916\u90e8JavaScript\u6587\u4ef6<\/h2>\n<\/p>\n
\u4e0eHTML\u9875\u9762\u76f8\u540c\uff0cJSP\u9875\u9762\u4e5f\u53ef\u4ee5\u5f15\u5165\u5916\u90e8JavaScript\u6587\u4ef6\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u91cd\u7528\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n
\u5f15\u5165\u5916\u90e8JavaScript\u6587\u4ef6\uff1a<\/strong><\/p>\n<\/p>\n
<script src="path\/to\/your\/javascript-file.js" type="text\/javascript"><\/script><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5c06\u5916\u90e8JavaScript\u6587\u4ef6\u653e\u5728\u9879\u76ee\u7684\u76f8\u5e94\u76ee\u5f55\u4e0b\uff0c\u7136\u540e\u5728JSP\u9875\u9762\u4e2d\u5f15\u7528\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528JSP\u8868\u8fbe\u5f0f\u8bed\u8a00\uff08EL\uff09\u548cJavaScript\u7ed3\u5408<\/h2>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u5c06JSP\u8868\u8fbe\u5f0f\u8bed\u8a00\uff08EL\uff09\u4e2d\u7684\u503c\u4f20\u9012\u7ed9JavaScript\u4ee3\u7801\u3002<\/p>\n<\/p>\n
<script type="text\/javascript"><\/p>\n
    var userAge = ${user.age};<\/p>\n
    if (userAge >= 18) {<\/p>\n
        alert('You are eligible.');<\/p>\n
    }<\/p>\n
<\/script><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u91cc\uff0c${user.age}<\/code>\u662f\u4e00\u4e2aJSP EL\u8868\u8fbe\u5f0f\uff0c\u5b83\u4ece\u4e00\u4e2a\u5728JSP\u9875\u9762\u8303\u56f4\u5185\u53ef\u8bbf\u95ee\u7684user<\/code>\u5bf9\u8c61\u4e2d\u83b7\u53d6\u5e74\u9f84\u5c5e\u6027\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u52a8\u6001\u751f\u6210JavaScript\u4ee3\u7801<\/h2>\n<\/p>\n
\u5728JSP\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Java\u4ee3\u7801\u52a8\u6001\u751f\u6210\u5e76\u8f93\u51faJavaScript\u4ee3\u7801\u3002<\/p>\n<\/p>\n
<%<\/p>\n
    String message = "This is a message from the server.";<\/p>\n
%><\/p>\n
<script type="text\/javascript"><\/p>\n
    var serverMessage = "<%= message %>";<\/p>\n
    alert(serverMessage);<\/p>\n
<\/script><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u5c06\u8f93\u51fa\u4e00\u4e2a\u5305\u542b\u6765\u81ea\u670d\u52a1\u5668\u7684\u6d88\u606f\u7684\u5f39\u7a97\u3002<\/p>\n<\/p>\n
\u516d\u3001\u6ce8\u610f\u4e8b\u9879\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h2>\n<\/p>\n
\u8f6c\u4e49\u5b57\u7b26\uff1a<\/strong><\/p>\n
\u5728\u4f20\u9012\u5b57\u7b26\u4e32\u65f6\uff0c\u52a1\u5fc5\u6b63\u786e\u5904\u7406JavaScript\u4e2d\u7684\u8f6c\u4e49\u5b57\u7b26\uff0c\u4ee5\u907f\u514d\u6f5c\u5728\u7684XSS\u653b\u51fb\u6216\u8bed\u6cd5\u9519\u8bef\u3002<\/p>\n<\/p>\n
\u4e8b\u4ef6\u5904\u7406\uff1a<\/strong><\/p>\n
\u63a8\u8350\u4f7f\u7528addEventListener<\/code>\u8fdb\u884c\u4e8b\u4ef6\u7ed1\u5b9a\uff0c\u800c\u4e0d\u662f\u5728HTML\u5143\u7d20\u4e2d\u76f4\u63a5\u4f7f\u7528onclick<\/code>\u3002<\/p>\n<\/p>\n
\u5185\u5bb9\u5b89\u5168\u7b56\u7565\uff08CSP\uff09\uff1a<\/strong><\/p>\n
\u9075\u5faa\u5185\u5bb9\u5b89\u5168\u7b56\u7565\uff0c\u786e\u4fddJavaScript\u4ee3\u7801\u7684\u5b89\u5168\u6267\u884c\uff0c\u907f\u514d\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u65b9\u6cd5\uff0cJSP\u9879\u76ee\u53ef\u4ee5\u6df1\u5ea6\u6574\u5408JavaScript\u4ee3\u7801\uff0c\u5b9e\u73b0\u4e30\u5bcc\u7684\u5ba2\u6237\u7aef\u4ea4\u4e92\u529f\u80fd\u3002\u9075\u5faa\u4e0a\u8ff0\u5b9e\u8df5\u65b9\u6cd5\uff0c\u53ef\u786e\u4fdd\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728JSP\u9879\u76ee\u4e2d\u6267\u884cJavaScript\u4ee3\u7801\uff1f<\/strong><\/p>\n
\u6267\u884cJavaScript\u4ee3\u7801\u5728JSP\u9879\u76ee\u4e2d\u662f\u5f88\u5e38\u89c1\u7684\u9700\u6c42\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff1a<\/p>\n
    \n
  • \u5728JSP\u9875\u9762\u4e2d\u4f7f\u7528<script><\/code>\u6807\u7b7e\uff1a\u53ef\u4ee5\u76f4\u63a5\u5728JSP\u9875\u9762\u7684<script><\/code>\u6807\u7b7e\u5185\u7f16\u5199JavaScript\u4ee3\u7801\uff0c\u5e76\u5728\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\u3002<\/li>\n
  • \u5728\u5916\u90e8JavaScript\u6587\u4ef6\u4e2d\u7f16\u5199\u4ee3\u7801\uff1a\u53ef\u4ee5\u5c06JavaScript\u4ee3\u7801\u5199\u5728\u5916\u90e8\u7684.js\u6587\u4ef6\u4e2d\uff0c\u7136\u540e\u901a\u8fc7\u5728JSP\u9875\u9762\u4e2d\u4f7f\u7528<script><\/code>\u6807\u7b7e\u7684src<\/code>\u5c5e\u6027\u5f15\u5165\u8be5\u6587\u4ef6\u3002<\/li>\n
  • \u4f7f\u7528jQuery\u7b49JavaScript\u5e93\uff1a\u5982\u679c\u4f60\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u4e86\u7c7b\u4f3cjQuery\u7684JavaScript\u5e93\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728JSP\u4e2d\u5f15\u5165\u8be5\u5e93\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7\u8c03\u7528\u76f8\u5173\u51fd\u6570\u6765\u6267\u884cJavaScript\u4ee3\u7801\u3002<\/li>\n<\/ul>\n
    2. \u5982\u4f55\u5728JSP\u9879\u76ee\u4e2d\u4f20\u9012\u53c2\u6570\u7ed9JavaScript\u4ee3\u7801\u5e76\u6267\u884c\uff1f<\/strong><\/p>\n
    \u6709\u65f6\u5019\u9700\u8981\u5c06JSP\u9875\u9762\u4e2d\u7684\u6570\u636e\u4f20\u9012\u7ed9JavaScript\u4ee3\u7801\u5e76\u8fdb\u884c\u64cd\u4f5c\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u5b9e\u73b0\u53c2\u6570\u4f20\u9012\uff1a<\/p>\n
      \n
    • \u4f7f\u7528JSP\u811a\u672c\u8868\u8fbe\u5f0f\uff1a\u53ef\u4ee5\u5728JSP\u9875\u9762\u4e2d\u4f7f\u7528<% ... %><\/code>\u7684\u811a\u672c\u8868\u8fbe\u5f0f\uff0c\u5c06\u53d8\u91cf\u7684\u503c\u5d4c\u5165\u5230JavaScript\u4ee3\u7801\u4e2d\u3002\u4f8b\u5982\uff1avar foo = <%= someVariable %>;<\/code>\u3002<\/li>\n
    • \u4f7f\u7528\u9690\u85cf\u57df\uff1a\u5728JSP\u9875\u9762\u4e2d\u8bbe\u7f6e\u4e00\u4e2a\u9690\u85cf\u57df\uff0c\u5e76\u5c06\u6570\u636e\u5b58\u50a8\u5728\u8be5\u9690\u85cf\u57df\u4e2d\u3002JavaScript\u4ee3\u7801\u53ef\u4ee5\u901a\u8fc7DOM\u64cd\u4f5c\u83b7\u53d6\u8be5\u9690\u85cf\u57df\u7684\u503c\u3002<\/li>\n
    • \u4f7f\u7528Ajax\u8bf7\u6c42\uff1a\u53ef\u4ee5\u4f7f\u7528Ajax\u6280\u672f\u5c06\u9700\u8981\u4f20\u9012\u7684\u53c2\u6570\u53d1\u9001\u7ed9\u540e\u7aef\uff0c\u7136\u540e\u540e\u7aef\u8fd4\u56de\u76f8\u5e94\u7684\u6570\u636e\uff0cJavaScript\u4ee3\u7801\u518d\u8fdb\u884c\u5904\u7406\u3002<\/li>\n<\/ul>\n
      3. \u5982\u4f55\u5728JSP\u9879\u76ee\u4e2d\u5904\u7406JavaScript\u4ee3\u7801\u7684\u9519\u8bef\u548c\u5f02\u5e38\uff1f<\/strong><\/p>\n
      \u5728\u6267\u884cJavaScript\u4ee3\u7801\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u9519\u8bef\u548c\u5f02\u5e38\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u7684\u65b9\u6cd5\uff1a<\/p>\n
        \n
      • \u4f7f\u7528try…catch\u8bed\u53e5\u5757\uff1a\u5728\u53ef\u80fd\u51fa\u73b0\u5f02\u5e38\u7684\u5730\u65b9\u4f7f\u7528try…catch\u8bed\u53e5\u5757\u8fdb\u884c\u6355\u83b7\uff0c\u5e76\u5728catch\u5757\u4e2d\u5904\u7406\u5f02\u5e38\u3002\u4f8b\u5982\uff1atry { ... } catch (error) { ... }<\/code>\u3002<\/li>\n
      • \u4f7f\u7528window.onerror\u4e8b\u4ef6\uff1a\u53ef\u4ee5\u76d1\u542cwindow\u5bf9\u8c61\u7684onerror\u4e8b\u4ef6\uff0c\u5f53JS\u4ee3\u7801\u51fa\u9519\u65f6\u4f1a\u89e6\u53d1\u8be5\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u5728\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u64cd\u4f5c\u3002<\/li>\n
      • \u4f7f\u7528\u6d4f\u89c8\u5668\u5f00\u53d1\u8005\u5de5\u5177\uff1a\u5728\u6d4f\u89c8\u5668\u7684\u5f00\u53d1\u8005\u5de5\u5177\u4e2d\u53ef\u4ee5\u67e5\u770bJavaScript\u7684\u9519\u8bef\u548c\u5f02\u5e38\u4fe1\u606f\uff0c\u5e2e\u52a9\u5b9a\u4f4d\u95ee\u9898\u5e76\u8fdb\u884c\u4fee\u590d\u3002<\/li>\n<\/ul>\n
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