Java8中字符串处理库strman-java的使用示例
投稿：daisy
除了Java本身的字符串处理方式外，我们还可以使用Apache Common Langs里的StringUtils来简化String的操作。但以上两种方式对于我们日常编程中最容易碰到的字符串处理来说，仍然显得有些不足。所以这篇文章给大家介绍Java8中字符串处理库strman-java的使用。
介绍
Strmen-java是一个字符串处理工具，你可以通过maven将它引入到项目中。Strmen-java为我们提供了一个非常完整且强大的解决方案，使用它可以解决几乎所有字符串处理场景。
使用
为了能在你的Java应用程序中使用strman-java，可以把这个包下载下来添加到你项目的lib目录中，如果使用的是Maven做项目管理，则只需要在你的pom.xml中加入如下依赖即可：
<dependency> <groupId>com.shekhargulati</groupId> <artifactId>strman</artifactId> <version>0.2.0</version> <type>jar</type> </dependency>
如果是Gradle用户则在build.gradle文件中添加如下代码：
compile(group: 'com.shekhargulati', name: 'strman', version: '0.2.0', ext: 'jar'){
transitive=true
}
示例
下面便是Strman-java的使用示例：
import strman.Strman;
import java.util.Arrays;
import java.util.Optional;
/**
* strman-java包的测试使用类
* Created by blinkfox on 16/7/17.
*/
public class StrmanTest {
public static void main(String[] args) {
// append 在一个字符串后追加任意个数的字符串
String s1 = Strman.append("f", "o", "o", "b", "a", "r");
System.out.println("append:" + s1); // result => "foobar"
// prepend 在一个字符串前追加任意个数的字符串
String s1pre = Strman.prepend("r", "f", "o", "o", "b", "a");
System.out.println("prepend:" + s1pre); // result => "foobar"
// appendArray 在一个字符串后先后追加一个字符串数组中的元素
String s2 = Strman.appendArray("f", new String[]{"o", "o", "b", "a", "r"});
System.out.println("append:" + s2); // result => "foobar"
// at 根据字符串的索引获取到对应的字符。如果索引是负数,则逆向获取,超出则抛出异常
Optional<String> s3 = Strman.at("foobar", 3);
System.out.println("at:" + s3.get()); // result => "b"
// between 得到一个字符串中,开始字符串和结束字符串之间的字符串的数组
String[] s4 = Strman.between("[abc], [def]", "[", "]");
System.out.println("between:" + Arrays.toString(s4)); // result => "[abc, def]"
// chars 得到一个字符串中所有字符构成的字符串数组
String[] s5 = Strman.chars("title");
System.out.println("chars:" + Arrays.toString(s5)); // result => "[t, i, t, l, e]"
// collapseWhitespace 替换掉连续的多个空格为一个空格
String s6 = Strman.collapseWhitespace("foo bar");
System.out.println("chars:" + s6); // result => "foo bar"
// contains 判断一个字符串是否包含另外一个字符串,第三个参数,表示字符串大小写是否敏感
boolean s7 = Strman.contains("foo bar", "foo");
boolean s8 = Strman.contains("foo bar", "FOO", false);
System.out.println("contains:" + s7 + ", " + s8); // result => "true, true"
// containsAll 判断一个字符串是否包含某字符串数组中的所有元素
boolean s9 = Strman.containsAll("foo bar", new String[]{"foo", "bar"});
boolean s10 = Strman.containsAll("foo bar", new String[]{"FOO", "bar"}, false);
System.out.println("containsAll:" + s9 + ", " + s10); // result => "true, true"
// containsAny 判断一个字符串是否包含某字符串数组中的任意一个元素
boolean s11 = Strman.containsAny("foo bar", new String[]{"FOO", "BAR", "Test"}, false);
System.out.println("containsAny:" + s11); // result => "true"
// countSubstr 判断一个字符串包含某字符串的个数
long s12 = Strman.countSubstr("aaaAAAaaa", "aaa");
long s13 = Strman.countSubstr("aaaAAAaaa", "aaa", false, false);
System.out.println("countSubstr:" + s12 + ", " + s13); // result => "2, 3"
// endsWith 判断一个字符串是否以某个字符串结尾
boolean s14 = Strman.endsWith("foo bar", "bar");
boolean s15 = Strman.endsWith("foo bar", "BAR", false);
System.out.println("endsWith:" + s14 + ", " + s15); // result => "true, true"
// ensureLeft 确保一个字符串以某个字符串开头,如果不是,则在前面追加该字符串,并将字符串结果返回
String s16 = Strman.ensureLeft("foobar", "foo");
String s17 = Strman.ensureLeft("bar", "foo");
String s18 = Strman.ensureLeft("foobar", "FOO", false);
System.out.println("ensureLeft:" + s16 + ", " + s17 + ", " + s18);
// result => "foobar, foobar, foobar"
// ensureRight 确保一个字符串以某个字符串开头,如果不是,则在前面追加该字符串,并将字符串结果返回
String s16r = Strman.ensureRight("foobar", "bar");
String s17r = Strman.ensureRight("foo", "bar");
String s18r = Strman.ensureRight("fooBAR", "bar", false);
System.out.println("ensureRight:" + s16r + ", " + s17r + ", " + s18r);
// result => "foobar, foobar, fooBAR"
// base64Encode 将字符串转成Base64编码的字符串
String s19 = Strman.base64Encode("strman");
System.out.println("base64Encode:" + s19); // result => "c3RybWFu"
// binDecode 将二进制编码（16位）转成字符串字符
String s20 = Strman.binDecode("0000000001000001");
System.out.println("binDecode:" + s20); // result => "A"
// binEncode 将字符串字符转成二进制编码（16位）
String s21 = Strman.binEncode("A");
System.out.println("binEncode:" + s21); // result => "0000000001000001"
// decDecode 将十进制编码（5位）转成字符串字符
String s22 = Strman.decDecode("00065");
System.out.println("decDecode:" + s22); // result => "A"
// decEncode 将字符串转成十进制编码（5位）
String s23 = Strman.decEncode("A");
System.out.println("decEncode:" + s23); // result => "00065"
// first 得到从字符串开始到索引n的字符串
String s24 = Strman.first("foobar", 3);
System.out.println("first:" + s24); // result => "foo"
// last 得到从字符串结尾倒数索引n的字符串
String s24l = Strman.last("foobar", 3);
System.out.println("last:" + s24l); // result => "bar"
// head 得到字符串的第一个字符
String s25 = Strman.head("foobar");
System.out.println("head:" + s25); // result => "f"
// hexDecode 将字符串字符转成十六进制编码（4位）
String s26 = Strman.hexDecode("0041");
System.out.println("hexDecode:" + s26); // result => "A"
// hexEncode 将十六进制编码（4位）转成字符串字符
String s27 = Strman.hexEncode("A");
System.out.println("hexEncode:" + s27); // result => "0041"
// inequal 测试两个字符串是否相等
boolean s28 = Strman.inequal("a", "b");
System.out.println("inequal:" + s28); // result => "true"
// insert 将子字符串插入到字符串某索引位置处
String s29 = Strman.insert("fbar", "oo", 1);
System.out.println("insert:" + s29); // result => "foobar"
// leftPad 将字符串从左补齐直到总长度为n为止
String s30 = Strman.leftPad("1", "0", 5);
System.out.println("leftPad:" + s30); // result => "00001"
// rightPad 将字符串从右补齐直到总长度为n为止
String s30r = Strman.rightPad("1", "0", 5);
System.out.println("rightPad:" + s30r); // result => "10000"
// lastIndexOf 此方法返回在指定值的最后一个发生的调用字符串对象中的索引，从偏移量中向后搜索
int s31 = Strman.lastIndexOf("foobarfoobar", "F", false);
System.out.println("lastIndexOf:" + s31); // result => "6"
// leftTrim 移除字符串最左边的所有空格
String s32 = Strman.leftTrim(" strman ");
System.out.println("leftTrim:" + s32); // result => "strman "
// rightTrim 移除字符串最右边的所有空格
String s32r = Strman.rightTrim(" strman ");
System.out.println("rightTrim:" + s32r); // result => " strman"
// removeEmptyStrings 移除字符串数组中的空字符串
String[] s33 = Strman.removeEmptyStrings(new String[]{"aa", "", " ", "bb", "cc", null});
System.out.println("removeEmptyStrings:" + Arrays.toString(s33));
// result => "[aa, bb, cc]"
// removeLeft 得到去掉前缀（如果存在的话）后的新字符串
String s34 = Strman.removeLeft("foobar", "foo");
System.out.println("removeLeft:" + s34); // result => "bar"
// removeRight 得到去掉后缀（如果存在的话）后的新字符串
String s34r = Strman.removeRight("foobar", "bar");
System.out.println("removeRight:" + s34r); // result => "foo"
// removeNonWords 得到去掉不是字符的字符串
String s35 = Strman.removeNonWords("foo&bar-");
System.out.println("removeNonWords:" + s35); // result => "foobar"
// removeSpaces 移除所有空格
String s36 = Strman.removeSpaces(" str man ");
System.out.println("removeSpaces:" + s36); // result => " strman"
// repeat 得到给定字符串和重复次数的新字符串
String s37 = Strman.repeat("1", 3);
System.out.println("repeat:" + s37); // result => "111"
// reverse 得到反转后的字符串
String s38 = Strman.reverse("foobar");
System.out.println("reverse:" + s38); // result => "raboof"
// safeTruncate 安全的截断字符串，不切一个字的一半,它总是返回最后一个完整的单词
String s39 = Strman.safeTruncate("A Javascript string manipulation library.", 19, "...");
System.out.println("safeTruncate:" + s39); // result => "A Javascript..."
// truncate 不太安全的截断字符串
String s40 = Strman.truncate("A Javascript string manipulation library.", 19, "...");
System.out.println("truncate:" + s40); // result => "A Javascript str..."
// htmlDecode 将html字符反转义
String s41 = Strman.htmlDecode("Ш");
System.out.println("htmlDecode:" + s41); // result => "Ш"
// htmlEncode 将html字符转义
String s42 = Strman.htmlEncode("Ш");
System.out.println("htmlEncode:" + s42); // result => "Ш"
// shuffle 将给定字符串转成随机字符顺序的字符串
String s43 = Strman.shuffle("shekhar");
System.out.println("shuffle:" + s43); // result => "rhsheak"
// slugify 将字符串分段(用"-"分段)
String s44 = Strman.slugify("foo bar");
System.out.println("slugify:" + s44); // result => "foo-bar"
// transliterate 删除所有非有效字符,如:á => a
String s45 = Strman.transliterate("fóõ bár");
System.out.println("transliterate:" + s45); // result => "foo bar"
// surround 给定的“前缀”和“后缀”来包裹一个字符串
String s46 = Strman.surround("div", "<", ">");
System.out.println("surround:" + s46); // result => "<div>"
// tail 得到去掉第一个字符后的字符串
String s47 = Strman.tail("foobar");
System.out.println("tail:" + s47); // result => "oobar"
// toCamelCase 转成驼峰式的字符串
String s48 = Strman.toCamelCase("Camel Case");
String s48_2 = Strman.toCamelCase("camel-case");
System.out.println("tail:" + s48 + ", " + s48_2); // result => "camelCase, camelCase"
// toStudlyCase 转成Studly式的字符串
String s49 = Strman.toStudlyCase("hello world");
System.out.println("toStudlyCase:" + s49); // result => "HelloWorld"
// toDecamelize 转成Decamelize式的字符串
String s50 = Strman.toDecamelize("helloWorld", null);
System.out.println("toDecamelize:" + s50); // result => "hello world"
// toKebabCase 转成Kebab式的字符串
String s51 = Strman.toKebabCase("hello World");
System.out.println("toKebabCase:" + s51); // result => "hello-world"
// toSnakeCase 转成Snake式的字符串
String s52 = Strman.toSnakeCase("hello world");
System.out.println("toSnakeCase:" + s52); // result => "hello_world"
}
}
总结
以上就是这篇文章的全部内容，希望能对大家的学习或者工作带来一定的帮助，如果有疑问大家可以留言交流。