对象名称和表名的转换，例如 ForumPost -> forum_posts，对象forumpost,该类执行两个转换过程：1

对象名称和表名的转换，例如 ForumPost -> forum_posts，对象forumpost,该类执行两个转换过程：1

该类执行两个转换过程：1. 小写和大写之间用下划线隔开，例如 ForumPost -> forum_post2. 转成复数形式 forum_post ->forum_posts主要目的是用来生成类名和表名之间的映射关系，此类扩展自Hibernate中的类。

用法

String tbl_name = Inflector.getInstance().tableize(ForumPost.class);

Inflector.java

package my.util;import java.util.*;import java.util.regex.*;/** * Transforms words (from singular to plural, from camelCase to under_score, etc.).  * I got bored of doing Real Work... * @author chuyeow * @modified Winter Lau (http://www.oschina.net) */public class Inflector {    // Pfft, can't think of a better name,     // but this is needed to avoid the price of initializing the pattern on each call.    private static final Pattern UNDERSCORE_PATTERN_1 = Pattern.compile("([A-Z]+)([A-Z][a-z])");    private static final Pattern UNDERSCORE_PATTERN_2 = Pattern.compile("([a-z\\d])([A-Z])");    private static List<RuleAndReplacement> plurals = new ArrayList<RuleAndReplacement>();    private static List<RuleAndReplacement> singulars = new ArrayList<RuleAndReplacement>();    private static List<String> uncountables = new ArrayList<String>();    private static Inflector instance = new Inflector(); // (Pseudo-)Singleton instance.    private Inflector() {        // Woo, you can't touch me.        initialize();    }    private void initialize() {        plural("$", "s");        plural("s$", "s");        plural("(ax|test)is$", "$1es");        plural("(octop|vir)us$", "$1i");        plural("(alias|status)$", "$1es");        plural("(bu)s$", "$1es");        plural("(buffal|tomat)o$", "$1oes");        plural("([ti])um$", "$1a");        plural("sis$", "ses");        plural("(?:([^f])fe|([lr])f)$", "$1$2ves");        plural("(hive)$", "$1s");        plural("([^aeiouy]|qu)y$", "$1ies");        plural("([^aeiouy]|qu)ies$", "$1y");        plural("(x|ch|ss|sh)$", "$1es");        plural("(matr|vert|ind)ix|ex$", "$1ices");        plural("([m|l])ouse$", "$1ice");        plural("(ox)$", "$1en");        plural("(quiz)$", "$1zes");        singular("s$", "");        singular("(n)ews$", "$1ews");        singular("([ti])a$", "$1um");        singular("((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$", "$1$2sis");        singular("(^analy)ses$", "$1sis");        singular("([^f])ves$", "$1fe");        singular("(hive)s$", "$1");        singular("(tive)s$", "$1");        singular("([lr])ves$", "$1f");        singular("([^aeiouy]|qu)ies$", "$1y");        singular("(s)eries$", "$1eries");        singular("(m)ovies$", "$1ovie");        singular("(x|ch|ss|sh)es$", "$1");        singular("([m|l])ice$", "$1ouse");        singular("(bus)es$", "$1");        singular("(o)es$", "$1");        singular("(shoe)s$", "$1");        singular("(cris|ax|test)es$", "$1is");        singular("([octop|vir])i$", "$1us");        singular("(alias|status)es$", "$1");        singular("^(ox)en", "$1");        singular("(vert|ind)ices$", "$1ex");        singular("(matr)ices$", "$1ix");        singular("(quiz)zes$", "$1");        irregular("person", "people");        irregular("man", "men");        irregular("child", "children");        irregular("sex", "sexes");        irregular("move", "moves");        uncountable(new String[] {"equipment", "information", "rice", "money", "species", "series", "fish", "sheep"});    }    public static Inflector getInstance() {        return instance;    }    public String underscore(String camelCasedWord) {        // Regexes in Java are fucking stupid...        String underscoredWord = UNDERSCORE_PATTERN_1.matcher(camelCasedWord).replaceAll("$1_$2");        underscoredWord = UNDERSCORE_PATTERN_2.matcher(underscoredWord).replaceAll("$1_$2");        underscoredWord = underscoredWord.replace('-', '_').toLowerCase();        return underscoredWord;    }    public String pluralize(String word) {        if (uncountables.contains(word.toLowerCase())) {            return word;        }        return replaceWithFirstRule(word, plurals);    }    public String singularize(String word) {        if (uncountables.contains(word.toLowerCase())) {            return word;        }        return replaceWithFirstRule(word, singulars);    }    private String replaceWithFirstRule(String word, List<RuleAndReplacement> ruleAndReplacements) {        for (RuleAndReplacement rar : ruleAndReplacements) {            String rule = rar.getRule();            String replacement = rar.getReplacement();            // Return if we find a match.            Matcher matcher = Pattern.compile(rule, Pattern.CASE_INSENSITIVE).matcher(word);            if (matcher.find()) {                return matcher.replaceAll(replacement);            }        }        return word;    }    public String tableize(String className) {        return pluralize(underscore(className));    }    public String tableize(Class<?> klass) {        // Strip away package name - we only want the 'base' class name.        String className = klass.getName().replace(klass.getPackage().getName()+".", "");        return tableize(className);    }    public static void plural(String rule, String replacement) {        plurals.add(0, new RuleAndReplacement(rule, replacement));    }    public static void singular(String rule, String replacement) {        singulars.add(0, new RuleAndReplacement(rule, replacement));    }    public static void irregular(String singular, String plural) {        plural(singular, plural);        singular(plural, singular);    }    public static void uncountable(String... words) {        for (String word : words) {            uncountables.add(word);        }    }}// Ugh, no open structs in Java (not-natively at least).class RuleAndReplacement {    private String rule;    private String replacement;    public RuleAndReplacement(String rule, String replacement) {        this.rule = rule;        this.replacement = replacement;    }    public String getReplacement() {        return replacement;    }    public void setReplacement(String replacement) {        this.replacement = replacement;    }    public String getRule() {        return rule;    }    public void setRule(String rule) {        this.rule = rule;    }}