strman--java8字符串工具类
strman-java 是Java8的字符串处理库，它的灵感来自 dleitee/strman 。
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。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。 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。
二、开始使用
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
}
三 实例
//append在一个字符串后面追加任意的字符串 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]" System.out.println("betweenLength:" + s4.length); // result => 2 // 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"
