我想拆分带分隔符空格的字符串。但它应该智能地处理引用的字符串。例如。对于像
这样的字符串"John Smith" Ted Barry
它应该返回三个字符串John Smith,Ted和Barry。
答案 0 :(得分:10)
搞乱之后,你可以使用正则表达式。运行相当于“匹配所有”的:
((?<=("))[\w ]*(?=("(\s|$))))|((?<!")\w+(?!"))
Java示例:
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class Test
{
public static void main(String[] args)
{
String someString = "\"Multiple quote test\" not in quotes \"inside quote\" \"A work in progress\"";
Pattern p = Pattern.compile("((?<=(\"))[\\w ]*(?=(\"(\\s|$))))|((?<!\")\\w+(?!\"))");
Matcher m = p.matcher(someString);
while(m.find()) {
System.out.println("'" + m.group() + "'");
}
}
}
输出:
'Multiple quote test'
'not'
'in'
'quotes'
'inside quote'
'A work in progress'
可以在此处查看使用上述示例的正则表达式细分:
尽管如此,正则表达式不应该是解决所有问题的方法 - 我只是玩得开心。这个例子有许多边缘情况,例如处理unicode字符,符号等。你最好使用一个久经考验的库来完成这类任务。在使用这个答案之前先看看其他答案。
答案 1 :(得分:4)
尝试这个丑陋的代码。
String str = "hello my dear \"John Smith\" where is Ted Barry";
List<String> list = Arrays.asList(str.split("\\s"));
List<String> resultList = new ArrayList<String>();
StringBuilder builder = new StringBuilder();
for(String s : list){
if(s.startsWith("\"")) {
builder.append(s.substring(1)).append(" ");
} else {
resultList.add((s.endsWith("\"")
? builder.append(s.substring(0, s.length() - 1))
: builder.append(s)).toString());
builder.delete(0, builder.length());
}
}
System.out.println(resultList);
答案 2 :(得分:3)
String example = "hello\"John Smith\" Ted Barry lol\"Basi German\"hello";
int wordQuoteStartIndex=0;
int wordQuoteEndIndex=0;
int wordSpaceStartIndex = 0;
int wordSpaceEndIndex = 0;
boolean foundQuote = false;
for(int index=0;index<example.length();index++) {
if(example.charAt(index)=='\"') {
if(foundQuote==true) {
wordQuoteEndIndex=index+1;
//Print the quoted word
System.out.println(example.substring(wordQuoteStartIndex, wordQuoteEndIndex));//here you can remove quotes by changing to (wordQuoteStartIndex+1, wordQuoteEndIndex-1)
foundQuote=false;
if(index+1<example.length()) {
wordSpaceStartIndex = index+1;
}
}else {
wordSpaceEndIndex=index;
if(wordSpaceStartIndex!=wordSpaceEndIndex) {
//print the word in spaces
System.out.println(example.substring(wordSpaceStartIndex, wordSpaceEndIndex));
}
wordQuoteStartIndex=index;
foundQuote = true;
}
}
if(foundQuote==false) {
if(example.charAt(index)==' ') {
wordSpaceEndIndex = index;
if(wordSpaceStartIndex!=wordSpaceEndIndex) {
//print the word in spaces
System.out.println(example.substring(wordSpaceStartIndex, wordSpaceEndIndex));
}
wordSpaceStartIndex = index+1;
}
if(index==example.length()-1) {
if(example.charAt(index)!='\"') {
//print the word in spaces
System.out.println(example.substring(wordSpaceStartIndex, example.length()));
}
}
}
}
这也会检查在引号之前或之前没有用空格分隔的单词,例如“John Smith”之前和“Basi German”之后的单词“hello”。
当字符串被修改为"John Smith" Ted Barry
时,输出为三个字符串,
1)“约翰史密斯”
2)特德
3)巴里
示例中的字符串是hello“John Smith”Ted Barry lol“Basi German”你好并打印 1)你好 2)“约翰史密斯” 3)特德 4)巴里 5)笑 6)“巴斯德语” 7)喂
希望有所帮助
答案 3 :(得分:1)
commons-lang有一个StrTokenizer类可以为你做这个,还有java-csv库。
StrTokenizer示例:
String params = "\"John Smith\" Ted Barry"
// Initialize tokenizer with input string, delimiter character, quote character
StrTokenizer tokenizer = new StrTokenizer(params, ' ', '"');
for (String token : tokenizer.getTokenArray()) {
System.out.println(token);
}
输出:
John Smith
Ted
Barry
答案 4 :(得分:1)
这是我自己的版本,从http://pastebin.com/aZngu65y清除(在评论中发布)。 它可以照顾Unicode。它将清理所有过多的空间(即使在引用中) - 根据需要,这可能是好的还是坏的。不支持转义报价。
private static String[] parse(String param) {
String[] output;
param = param.replaceAll("\"", " \" ").trim();
String[] fragments = param.split("\\s+");
int curr = 0;
boolean matched = fragments[curr].matches("[^\"]*");
if (matched) curr++;
for (int i = 1; i < fragments.length; i++) {
if (!matched)
fragments[curr] = fragments[curr] + " " + fragments[i];
if (!fragments[curr].matches("(\"[^\"]*\"|[^\"]*)"))
matched = false;
else {
matched = true;
if (fragments[curr].matches("\"[^\"]*\""))
fragments[curr] = fragments[curr].substring(1, fragments[curr].length() - 1).trim();
if (fragments[curr].length() != 0)
curr++;
if (i + 1 < fragments.length)
fragments[curr] = fragments[i + 1];
}
}
if (matched) {
return Arrays.copyOf(fragments, curr);
}
return null; // Parameter failure (double-quotes do not match up properly).
}
用于比较的样本输入:
"sdfskjf" sdfjkhsd "hfrif ehref" "fksdfj sdkfj fkdsjf" sdf sfssd
asjdhj sdf ffhj "fdsf fsdjh"
日本語 中文 "Tiếng Việt" "English"
dsfsd
sdf " s dfs fsd f " sd f fs df fdssf "日本語 中文"
"" "" ""
" sdfsfds " "f fsdf
(第2行为空,第3行为空格,最后一行为格式错误)。 请根据您自己的预期输出判断,因为它可能会有所不同,但基线是这样的,第一种情况应该返回[sdfskjf,sdfjkhsd,hfrif ehref,fksdfj sdkfj fkdsjf,sdf,sfssd]。