Jes*_*ura 1 java arrays string
我有一位教授要求我们删除HTML标签(<和>中的任何内容),而不使用removeAll方法.
我目前有这个:
public static void main(String[] args)
throws FileNotFoundException {
Scanner input = new Scanner(new File("src/HTML_1.txt"));
while (input.hasNext())
{
String html = input.next();
System.out.println(stripHtmlTags(html));
}
}
static String stripHtmlTags(String html)
{
int i;
String[] str = html.split("");
String s = "";
boolean tag = false;
for (i = html.indexOf("<"); i < html.indexOf(">"); i++)
{
tag = true;
}
if (!tag)
{
for (i = 0; i < str.length; i++)
{
s += str[i];
}
}
return s;
}
这是文件内部的内容:
<html>
<head>
<title>My web page</title>
</head>
<body>
<p>There are many pictures of my cat here,
as well as my <b>very cool</b> blog page,
which contains <font color="red">awesome
stuff about my trip to Vegas.</p>
Here's my cat now:<img src="cat.jpg">
</body>
</html>
这是输出应该是这样的:
My web page
There are many pictures of my cat here,
as well as my very cool blog page,
which contains awesome
stuff about my trip to Vegas.
Here's my cat now:
String 在Java +中是不可变的你永远不会显示任何东西我建议你close你的Scanner时候用它做(作为最佳实践),和读取HTML_1.txt从用户的主目录文件.最简单的方法close是try-with-resources喜欢
public static void main(String[] args) {
try (Scanner input = new Scanner(new File(
System.getProperty("user.home"), "HTML_1.txt"))) {
while (input.hasNextLine()) {
String html = stripHtmlTags(input.nextLine().trim());
if (!html.isEmpty()) { // <-- removes empty lines.
System.out.println(html);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
因为String是不可变的我会建议StringBuilder删除HTML标签之类的
static String stripHtmlTags(String html) {
StringBuilder sb = new StringBuilder(html);
int open;
while ((open = sb.indexOf("<")) != -1) {
int close = sb.indexOf(">", open + 1);
sb.delete(open, close + 1);
}
return sb.toString();
}
My web page
There are many pictures of my cat here,
as well as my very cool blog page,
which contains awesome
stuff about my trip to Vegas.
Here's my cat now:
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