blocks|key|400059|text|一个非常简单的String.split()实现|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|400060|String+path+=+"/abc/def/ghfj.doc";
//+Split+path+into+segments
String+segments[]+=+path.split("/");
//+Grab+the+last+segment
String+document+=+segments[segments.length+-+1];|code-block|syntax|javascript|400061|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#split(java.lang.String))^0|7|E|7|E|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

A very simple implementation with <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html#split(java.lang.String)" rel="noreferrer"><code>String.split()</code></a>:

<pre><code>String path = "/abc/def/ghfj.doc";
// Split path into segments
String segments[] = path.split("/");
// Grab the last segment
String document = segments[segments.length - 1];
</code></pre>

blocks|key|182066|text|String+example+=+"/abc/def/ghfj.doc";
System.out.println(example.substring(example.lastIndexOf("/")+%2B+1));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|182067|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre class="lang-java prettyprint-override"><code>String example = &quot;/abc/def/ghfj.doc&quot;;
System.out.println(example.substring(example.lastIndexOf(&quot;/&quot;) + 1));
</code></pre>

blocks|key|182072|text|你试过什么？这很简单：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|182073|String+s+=+"/abc/def/ghfj.doc";
s.substring(s.lastIndexOf("/")+%2B+1)|code-block|syntax|javascript|182074|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

what have you tried?
it's very simple:

<pre><code>String s = "/abc/def/ghfj.doc";
s.substring(s.lastIndexOf("/") + 1)
</code></pre>

blocks|key|182102|text|我认为如果我们直接使用分裂函数会更好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|182103|String+toSplit+=+"/abc/def/ghfj.doc";

String+result[]+=+toSplit.split("/");

String+returnValue+=+result[result.length+-+1];+//equals+"ghfj.doc"|code-block|syntax|javascript|182104|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I think that would be better if we use directly the split function 

<pre><code>String toSplit = "/abc/def/ghfj.doc";

String result[] = toSplit.split("/");

String returnValue = result[result.length - 1]; //equals "ghfj.doc"
</code></pre>

blocks|key|182150|text|您可以使用Apache+commons：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|182151|对于最后一次出现的子串，使用this方法。|offset|length|182152|对于第一次出现的子串，等价方法是here。|182153|entityMap|0|LINK|mutability|MUTABLE|url|https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#substringAfterLast(java.lang.String,%2520java.lang.String)|1|https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#substringAfter(java.lang.String,%2520java.lang.String))^0|0|E|4|0|0|G|4|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

You can use Apache commons:

For substring after last occurrence use <a href="https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#substringAfterLast(java.lang.String,%20java.lang.String)" rel="noreferrer">this</a> method.

And for substring after first occurrence equivalent method is <a href="https://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/StringUtils.html#substringAfter(java.lang.String,%20java.lang.String)" rel="noreferrer">here</a>.

blocks|key|182164|text|这也可以获取文件名|type|unstyled|depth|inlineStyleRanges|entityRanges|data|182165|import+java.nio.file.Paths;
import+java.nio.file.Path;
Path+path+=+Paths.get("/abc/def/ghfj.doc");
System.out.println(path.getFileName().toString());|code-block|syntax|javascript|182166|将打印ghfj.doc|offset|length|style|CODE|182167|entityMap^0|0|0|3|8|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This can also get the filename

<pre><code>import java.nio.file.Paths;
import java.nio.file.Path;
Path path = Paths.get("/abc/def/ghfj.doc");
System.out.println(path.getFileName().toString());
</code></pre>

Will print <code>ghfj.doc</code>

blocks|key|400195|text|另一种方法是使用this。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|400196|String+path+=+"/abc/def/ghfj.doc"
String+fileName+=+StringUtils.substringAfterLast(path,+"/");|code-block|syntax|javascript|400197|如果你将null传递给这个方法，它将返回null。如果不匹配分隔符，它将返回空字符串。|400198|entityMap|0|LINK|mutability|MUTABLE|url|https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html^0|8|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Another way is to use <a href="https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html" rel="noreferrer">this</a>.

<pre><code>String path = "/abc/def/ghfj.doc"
String fileName = StringUtils.substringAfterLast(path, "/");
</code></pre>

If you pass null to this method it will return null. If there is no match with separator it will return empty string.

blocks|key|400213|text|使用Guava可以做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|400214|String+id="/abc/def/ghfj.doc";
String+valIfSplitIsEmpty="";
return+Iterables.getLast(Splitter.on("/").split(id),valIfSplitIsEmpty);|code-block|syntax|javascript|400215|最终配置Splitter并使用|style|CODE|400216|Splitter.on("/")
.trimResults()
.omitEmptyStrings()
...|400217|还可以了解一下this+article+on+guava+Splitter和this+article+on+guava+Iterables|400218|entityMap|0|LINK|mutability|MUTABLE|url|https://mvnrepository.com/artifact/com.google.guava/guava/23.6-jre|1|https://github.com/google/guava/wiki/StringsExplained#splitter|2|https://github.com/google/guava/wiki/CollectionUtilitiesExplained#iterables^0|2|5|0|0|0|4|8|0|0|7|U|1|12|V|2|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@$A|18|B|19|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|O|3|P|5|6|7|1B|8|@]|9|@$A|1C|B|1D|1|1E]|$A|1F|B|1G|1|1H]]|C|$]]|$1|Q|3|-4|5|6|7|1I|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]|Y|$5|T|U|V|C|$W|Z]]|10|$5|T|U|V|C|$W|11]]]]

With <a href="https://mvnrepository.com/artifact/com.google.guava/guava/23.6-jre" rel="nofollow noreferrer">Guava</a> do this:

<pre><code>String id="/abc/def/ghfj.doc";
String valIfSplitIsEmpty="";
return Iterables.getLast(Splitter.on("/").split(id),valIfSplitIsEmpty);
</code></pre>

Eventually configure the <code>Splitter</code> and use

<pre><code>Splitter.on("/")
.trimResults()
.omitEmptyStrings()
...
</code></pre>

Also take a look into <a href="https://github.com/google/guava/wiki/StringsExplained#splitter" rel="nofollow noreferrer">this article on guava Splitter</a> and <a href="https://github.com/google/guava/wiki/CollectionUtilitiesExplained#iterables" rel="nofollow noreferrer">this article on guava Iterables</a>

I have a string:

<pre><code>/abc/def/ghfj.doc
</code></pre>

I would like to extract <code>ghfj.doc</code> from this, i.e. the substring after the last <code>/</code>, or first <code>/</code> from right.

Could someone please provide some help?

Java: Getting a substring from a string starting after a particular character

我有一个字符串：/abc/def/ghfj.doc我想从中提取ghfj.doc，即最后一个/之后的子字符串，或从右开始的第一个/。有没有人能帮个忙？

问Java:从特定字符之后开始的字符串中获取一个子字符串
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