我从一个看起来像<HTML CODE HERE>Text I want to get
的网站中取出一个字符串并删除其中的括号和文本,但是,我的最终结果始终为null。
我在想的是,
try {
String desc = null;
StringBuilder sb = new StringBuilder();
BufferedReader r = new BufferedReader(new InputStreamReader(in));
String line = null;
boolean codeBlock;
codeBlock = false;
line = "<HTMLCODEHERE>Text I want to get";
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! STARTING DESC: " + line);
while((line = r.readLine()) != null) {
if((line = r.readLine()) == "<") {
codeBlock = true;
}
if((line = r.readLine()) == ">") {
codeBlock = false;
}
if(!codeBlock) {
sb.append(line);
desc = sb.toString();
}
}
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ENDING DESC: " + desc);
holder.txtContent.setText(desc);
} catch (IOException e) {
e.printStackTrace();
}
看看BufferedReader的Java API,即readline:
读一行文字。一条线被认为是由换行符('\ n'),回车符('\ r')或回车符中的任何一个终止,后面紧跟换行符。
https://docs.oracle.com/javase/7/docs/api/java/io/BufferedReader.html#readLine()
因此你的代码在这里:
if((line = r.readLine()) == "<") {
codeBlock = true;
}
if((line = r.readLine()) == ">") {
codeBlock = false;
}
永远不会是真的。这些电话也会让您远离目前的分析线。
如果我正确理解您的问题,您希望任何HTML标记之间的所有文本?您可以使用像jsoup
这样的库,或者实现更简单的实现:
String parse = "<HTMLCODE>My favourite pasta is spaghetti, followed by ravioli</HTMLCODE>";
final char TAG_START = '<';
final char TAG_END = '>';
StringBuilder sb = new StringBuilder();
char[] parseChars = parse.toCharArray();
boolean inTag = true;
for (int i = 0; i< parseChars.length; i++) {
if (parseChars[i] == TAG_START) {
inTag = true;
continue;
}
else if (parseChars[i] == TAG_END) {
inTag = false;
continue;
}
if (!inTag) {
sb.append(parseChars[i]);
}
}
System.out.println(sb.toString());