我有一些带有 Servlet 代码的 JavaScript 代码，我想将它们(之间)全部移动到外部 js 文件，但它不起作用，我该怎么办？如果只有部分 JavaScript 可以移动到外部文件，如何修改我的代码。
<script language="JavaScript" type="text/JavaScript">
var sel = document.getElementById('sel');
var selList = [];
<%
String key = "";
String text = "";
for(int i = 0; i < master.size(); i++) {
Map option = (Map) master.get(i);
key = (String) option.get("Code");
text = key + " " + (String) option.get("NAME");
%>
selList.push({
key: "<%=key%>",
text: "<%=text%>"
});
<%
}
%>
</script>
最佳答案
这里有两个选项:
1-不使用ajax
外部.js
var images;
function renderImages(){
//do things for showing images here.
//images variable has images data as JSON (i suggest you this way) so you can easily iterate over list and render it.
}
jsp
<html>
<head>
<script type="text/javascript" src="external.js"></script>
<script>
images = "<%=request.getAttribute("imageDataAsJSON")%>"; //here i assume you populate request variable with your image data in JSON format. Be careful about parse errors due to ' and ".
</script>
</head>
<body>
<script>
renderImages();
</script>
</body>
</html>
2-通过使用ajax(您可以将客户端逻辑分离到外部js代码中，并通过对服务器端进行ajax调用来将数据填充到其中。)
外部.js
function renderImages(){
//do ajax to your servlet which returns image data as JSON.
//iterate over image data and render your html elements accordingly.
}
jsp
<html>
<head>
<script type="text/javascript" src="external.js"></script>
</head>
<body>
</body>
</html>
关于javascript - 如何将 JavaScript 代码与 Servlet 一起移动到外部文件中？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44300423/