Apache Commons Text

Wu Jun 2019-12-25 15:59:03

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包结构

Package	Description
org.apache.commons.text	文本处理基础类
org.apache.commons.text.diff	提供比较字符串差异的算法
org.apache.commons.text.lookup	提供使用`StringSubstitutor`查找字符串的算法
org.apache.commons.text.matcher	提供使用`StringSubstitutor`匹配字符串的算法
org.apache.commons.text.similarity	提供字符串相似度的算法
org.apache.commons.text.translate	由一组小的构件块创建文本翻译规则的API

常用

基础类

AlphabetConverter ：字母转换

 Character[] originals;   // a, b, c, d
 Character[] encoding;    // 0, 1, d
 Character[] doNotEncode; // d

 AlphabetConverter ac = AlphabetConverter.createConverterFromChars(originals, encoding, doNotEncode);

 ac.encode("a");    // 00
 ac.encode("b");    // 01
 ac.encode("c");    // 0d
 ac.encode("d");    // d
 ac.encode("abcd"); // 00010dd

CaseUtils ：驼峰转换

 toCamelCase(String str, boolean capitalizeFirstLetter, char... delimiters)

 CaseUtils.toCamelCase(null, false)                                 = null
 CaseUtils.toCamelCase("", false, *)                                = ""
 CaseUtils.toCamelCase("To.Camel.Case", false, new char[]{'.'})     = "toCamelCase"
 CaseUtils.toCamelCase(" to @ Camel case", true, new char[]{'@'})   = "ToCamelCase"
 CaseUtils.toCamelCase(" @to @ Camel case", false, new char[]{'@'}) = "toCamelCase"

RandomStringGenerator ：随机字符串生成

generate(int length) generate(int minLengthInclusive, int maxLengthInclusive)

StringEscapeUtils ：字符串转义适用于Java, Javascript, HTML 和XML.

escapeSql - 提供sql转义功能，防止sql注入攻击

StringEscapeUtils.escapeSql("or 1=1 ")

escapeHtml /unescapeHtml 转义/反转义html脚本

StringEscapeUtils.unescapeHtml("&lt;a&gt;dddd&lt;/a&gt;")

escapeJavascript/unescapeJavascript 转义/反转义js脚本

StringEscapeUtils.escapeJavaScript("<script>alert('1111')</script>")

escapeJava/unescapeJava 把字符串转为unicode编码

StringEscapeUtils.escapeJava("测试")

StringSubstitutor ：字符串替换器通过方法或构造器，用 ${变量名} 替换，通常将变量放在 map 中

replace 替换

 Map valuesMap = HashMap();
 valuesMap.put("animal", "quick brown fox");
 valuesMap.put("target", "lazy dog");
 String templateString = "The ${animal} jumped over the ${target}.";
 StrSubstitutor sub = new StrSubstitutor(valuesMap);
 String resolvedString = sub.replace(templateString);

replaceSystemProperties 替换系统属性

 StrSubstitutor.replaceSystemProperties("You are running with java.version = ${java.version} and os.name = ${os.name}.");

StringTokenizer ：字符串标记截取
与 java.util.StringTokenizer 类似，但更灵活可控。
与String.Split()的区别是，split使用正则表达式，StringTokenizer是逐字截取

构造器

StringTokenizer(String input)//构造默认分隔符（空格，制表符，换行符和换页符）解析器
StringTokenizer(String input, char delim)//构造制定分隔符解析器

使用

String str = "100|66,55:200|567,90:102|43,54";
StringTokenizer st = new StringTokenizer(str ，":,|");
while( st.hasMoreElements() ){
    System.out.println(st.nextToken());
}

WordUtils ：词语操作

wrap - 封装字符串，以空格区分单词，固定长度换行，可自定义换行符

String str = "Here is one line of text that is going to be wrapped after 20 columns." 
WordUtils.wrap(str,20)//"Here is one line of\ntext that is going\nto be wrapped after\n20 columns."
WordUtils.wrap(str,20,"<br />",false)//"Here is one line of<br />text that is going< br />to be wrapped after<br />20 columns."

capitalize - 首字母大写

 WordUtils.capitalize(null)        = null
 WordUtils.capitalize("")          = ""
 WordUtils.capitalize("i am FINE") = "I Am FINE"

capitalizeFully - 首字母大写，其余小写

 WordUtils.capitalizeFully(null)        = null
 WordUtils.capitalizeFully("")          = ""
 WordUtils.capitalizeFully("i am FINE") = "I Am Fine"

uncapitalize - 取消首字母大写

 WordUtils.uncapitalize(null)        = null
 WordUtils.uncapitalize("")          = ""
 WordUtils.uncapitalize("I Am FINE") = "i am fINE"

swapCase - 大小写反转

 StringUtils.swapCase(null)                 = null
 StringUtils.swapCase("")                   = ""
 StringUtils.swapCase("The dog has a BONE") = "tHE DOG HAS A bone"

initials - 首字母缩写

 WordUtils.initials(null)             = null
 WordUtils.initials("")               = ""
 WordUtils.initials("Ben John Lee")   = "BJL"
 WordUtils.initials("Ben J.Lee")      = "BJ"

containsAllWords - 是否包含数组所有单词

containsAllWords(CharSequence word,CharSequence... words)
 WordUtils.containsAllWords("abcd", "ab", "cd") = false
 WordUtils.containsAllWords("abc def", "def", "abc") = true

abbreviate - 缩写语句。从第一个空格之后开始，设置最低最高限制，可选结尾符，-1为不限制

abbreviate(String str,int lower,int upper,String appendToEnd)
 WordUtils.abbreviate("Now is the time for all good men", 0, 40, null));     = "Now"
 WordUtils.abbreviate("Now is the time for all good men", 10, 40, null));    = "Now is the"
 WordUtils.abbreviate("Now is the time for all good men", 20, 40, " ..."));  = "Now is the time for all ..."
 WordUtils.abbreviate("Now is the time for all good men", 1000, -1, ""));    = "Now is the time for all good men"
 WordUtils.abbreviate("Now is the time for all good men", 9, -10, null));    = IllegalArgumentException

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