import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.Calendar;

import java.util.Date;

import java.util.Iterator;

 

import org.apache.commons.lang3.ArrayUtils;

import org.apache.commons.lang3.CharSet;

import org.apache.commons.lang3.CharSetUtils;

import org.apache.commons.lang3.ClassUtils;

import org.apache.commons.lang3.ObjectUtils;

import org.apache.commons.lang3.RandomStringUtils;

import org.apache.commons.lang3.SerializationUtils;

import org.apache.commons.lang3.StringEscapeUtils;

import org.apache.commons.lang3.StringUtils;

import org.apache.commons.lang3.SystemUtils;

import org.apache.commons.lang3.Validate;

import org.apache.commons.lang3.builder.EqualsBuilder;

import org.apache.commons.lang3.builder.HashCodeBuilder;

import org.apache.commons.lang3.builder.ToStringBuilder;

import org.apache.commons.lang3.builder.ToStringStyle;

import org.apache.commons.lang3.math.NumberUtils;

import org.apache.commons.lang3.text.WordUtils;

import org.apache.commons.lang3.time.DateFormatUtils;

import org.apache.commons.lang3.time.DateUtils;

import org.apache.commons.lang3.time.StopWatch;

 

public class TestLangDemo {

 

    public void charSetDemo() {

        System.out.println ("**CharSetDemo**");

        CharSet charSet = CharSet.getInstance ("aeiou");

        String demoStr = "The quick brown fox jumps over the lazy dog.";

        int count = 0;

        for (int i = 0, len = demoStr.length(); i < len; i++) {

            if (charSet.contains (demoStr.charAt (i) ) ) {

                count++;

            }

        }

        System.out.println ("count: " + count);

    }

 

    public void charSetUtilsDemo() {

        System.out.println ("**CharSetUtilsDemo**");

        System.out.println ("计算字符串中包含某字符数.");

        System.out.println (CharSetUtils.count (

                                "The quick brown fox jumps over the lazy dog.", "aeiou") );

 

        System.out.println ("删除字符串中某字符.");

        System.out.println (CharSetUtils.delete (

                                "The quick brown fox jumps over the lazy dog.", "aeiou") );

 

        System.out.println ("保留字符串中某字符.");

        System.out.println (CharSetUtils.keep (

                                "The quick brown fox jumps over the lazy dog.", "aeiou") );

 

        System.out.println ("合并重复的字符.");

        System.out.println (CharSetUtils.squeeze ("a  bbbbbb     c dd", "b d") );

    }

 

    public void objectUtilsDemo() {

        System.out.println ("**ObjectUtilsDemo**");

        System.out.println ("Object为null时，默认打印某字符.");

        Object obj = null;

        System.out.println (ObjectUtils.defaultIfNull (obj, "空") );

 

        System.out.println ("验证两个引用是否指向的Object是否相等,取决于Object的equals()方法.");

        Object a = new Object();

        Object b = a;

        Object c = new Object();

        System.out.println (ObjectUtils.equals (a, b) );

        System.out.println (ObjectUtils.equals (a, c) );

 

        System.out.println ("用父类Object的toString()方法返回对象信息.");

        Date date = new Date();

        System.out.println (ObjectUtils.identityToString (date) );

        System.out.println (date);

 

        System.out.println ("返回类本身的toString()方法结果,对象为null时，返回0长度字符串.");

        System.out.println (ObjectUtils.toString (date) );

        System.out.println (ObjectUtils.toString (null) );

        System.out.println (date);

    }

 

    public void serializationUtilsDemo() {

        System.out.println ("*SerializationUtils**");

        Date date = new Date();

        byte[] bytes = SerializationUtils.serialize (date);

        System.out.println (ArrayUtils.toString (bytes) );

        System.out.println (date);

 

        Date reDate = (Date) SerializationUtils.deserialize (bytes);

        System.out.println (reDate);

        System.out.println (ObjectUtils.equals (date, reDate) );

        System.out.println (date == reDate);

 

        FileOutputStream fos = null;

        FileInputStream fis = null;

        try {

            fos = new FileOutputStream (new File ("d:/test.txt") );

            fis = new FileInputStream (new File ("d:/test.txt") );

            SerializationUtils.serialize (date, fos);

            Date reDate2 = (Date) SerializationUtils.deserialize (fis);

 

            System.out.println (date.equals (reDate2) );

 

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } finally {

            try {

                fos.close();

                fis.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

 

    }

 

    public void randomStringUtilsDemo() {

        System.out.println ("**RandomStringUtilsDemo**");

        System.out.println ("生成指定长度的随机字符串,好像没什么用.");

        System.out.println (RandomStringUtils.random (500) );

 

        System.out.println ("在指定字符串中生成长度为n的随机字符串.");

        System.out.println (RandomStringUtils.random (5, "abcdefghijk") );

 

        System.out.println ("指定从字符或数字中生成随机字符串.");

        System.out.println (RandomStringUtils.random (5, true, false) );

        System.out.println (RandomStringUtils.random (5, false, true) );

 

    }

 

    public void stringUtilsDemo() {

        System.out.println ("**StringUtilsDemo**");

        System.out.println ("将字符串重复n次，将文字按某宽度居中，将字符串数组用某字符串连接.");

        String[] header = new String[3];

        header[0] = StringUtils.repeat ("*", 50);

        header[1] = StringUtils.center ("  StringUtilsDemo  ", 50, "^O^");

        header[2] = header[0];

        String head = StringUtils.join (header, "\n");

        System.out.println (head);

 

        System.out.println ("缩短到某长度,用...结尾.");

        System.out.println (StringUtils.abbreviate (

                                "The quick brown fox jumps over the lazy dog.", 10) );

        System.out.println (StringUtils.abbreviate (

                                "The quick brown fox jumps over the lazy dog.", 15, 10) );

 

        System.out.println ("返回两字符串不同处索引号.");

        System.out.println (StringUtils.indexOfDifference ("aaabc", "aaacc") );

 

        System.out.println ("返回两字符串不同处开始至结束.");

        System.out.println (StringUtils.difference ("aaabcde", "aaaccde") );

 

        System.out.println ("截去字符串为以指定字符串结尾的部分.");

        System.out.println (StringUtils.chomp ("aaabcde", "de") );

 

        System.out.println ("检查一字符串是否为另一字符串的子集.");

        System.out.println (StringUtils.containsOnly ("aad", "aadd") );

 

        System.out.println ("检查一字符串是否不是另一字符串的子集.");

        System.out.println (StringUtils.containsNone ("defg", "aadd") );

 

        System.out.println ("检查一字符串是否包含另一字符串.");

        System.out.println (StringUtils.contains ("defg", "ef") );

        System.out.println (StringUtils.containsOnly ("ef", "defg") );

 

        System.out.println ("返回可以处理null的toString().");

        System.out.println (StringUtils.defaultString ("aaaa") );

        System.out.println ("?" + StringUtils.defaultString (null) + "!");

 

        System.out.println ("去除字符中的空格.");

        System.out.println (StringUtils.deleteWhitespace ("aa  bb  cc") );

 

        System.out.println ("分隔符处理成数组.");

        String[] strArray = StringUtils.split ("a,b,,c,d,null,e", ",");

        System.out.println (strArray.length);

        System.out.println (strArray.toString() );

 

        System.out.println ("判断是否是某类字符.");

        System.out.println (StringUtils.isAlpha ("ab") );

        System.out.println (StringUtils.isAlphanumeric ("12") );

        System.out.println (StringUtils.isBlank ("") );

        System.out.println (StringUtils.isNumeric ("123") );

    }

 

    public void systemUtilsDemo() {

        System.out.println (genHeader ("SystemUtilsDemo") );

        System.out.println ("获得系统文件分隔符.");

        System.out.println (SystemUtils.FILE_SEPARATOR);

 

        System.out.println ("获得源文件编码.");

        System.out.println (SystemUtils.FILE_ENCODING);

 

        System.out.println ("获得ext目录.");

        System.out.println (SystemUtils.JAVA_EXT_DIRS);

 

        System.out.println ("获得java版本.");

        System.out.println (SystemUtils.JAVA_VM_VERSION);

 

        System.out.println ("获得java厂商.");

        System.out.println (SystemUtils.JAVA_VENDOR);

    }

 

    public void classUtilsDemo() {

        System.out.println (genHeader ("ClassUtilsDemo") );

        System.out.println ("获取类实现的所有接口.");

        System.out.println (ClassUtils.getAllInterfaces (Date.class) );

 

        System.out.println ("获取类所有父类.");

        System.out.println (ClassUtils.getAllSuperclasses (Date.class) );

 

        System.out.println ("获取简单类名.");

        System.out.println (ClassUtils.getShortClassName (Date.class) );

 

        System.out.println ("获取包名.");

        System.out.println (ClassUtils.getPackageName (Date.class) );

 

        System.out.println ("判断是否可以转型.");

        System.out.println (ClassUtils.isAssignable (Date.class, Object.class) );

        System.out.println (ClassUtils.isAssignable (Object.class, Date.class) );

    }

 

    public void stringEscapeUtilsDemo() {

        System.out.println (genHeader ("StringEcsapeUtils") );

        System.out.println ("转换特殊字符.");

        System.out.println ("html:" + StringEscapeUtils.escapeHtml3 (" ") );

        System.out.println ("html:" + StringEscapeUtils.escapeHtml4 (" ") );

        System.out.println ("html:" + StringEscapeUtils.unescapeHtml3 ("<p>") );

        System.out.println ("html:" + StringEscapeUtils.unescapeHtml4 ("<p>") );

    }

 

    private final class BuildDemo {

        String name;

        int age;

 

        public BuildDemo (String name, int age) {

            this.name = name;

            this.age = age;

        }

 

        public String toString() {

            ToStringBuilder tsb = new ToStringBuilder (this, ToStringStyle.MULTI_LINE_STYLE);

            tsb.append ("Name", name);

            tsb.append ("Age", age);

            return tsb.toString();

        }

 

        public int hashCode() {

            HashCodeBuilder hcb = new HashCodeBuilder();

            hcb.append (name);

            hcb.append (age);

            return hcb.hashCode();

        }

 

        public boolean equals (Object obj) {

            if (! (obj instanceof BuildDemo) ) {

                return false;

            }

            BuildDemo bd = (BuildDemo) obj;

            EqualsBuilder eb = new EqualsBuilder();

            eb.append (name, bd.name);

            eb.append (age, bd.age);

            return eb.isEquals();

        }

    }

 

    public void builderDemo() {

        System.out.println (genHeader ("BuilderDemo") );

        BuildDemo obj1 = new BuildDemo ("a", 1);

        BuildDemo obj2 = new BuildDemo ("b", 2);

        BuildDemo obj3 = new BuildDemo ("a", 1);

 

        System.out.println ("toString()");

        System.out.println (obj1);

        System.out.println (obj2);

        System.out.println (obj3);

 

        System.out.println ("hashCode()");

        System.out.println (obj1.hashCode() );

        System.out.println (obj2.hashCode() );

        System.out.println (obj3.hashCode() );

 

        System.out.println ("equals()");

        System.out.println (obj1.equals (obj2) );

        System.out.println (obj1.equals (obj3) );

    }

 

    public void numberUtils() {

        System.out.println (genHeader ("NumberUtils") );

        System.out.println ("字符串转为数字(不知道有什么用).");

        System.out.println (NumberUtils.toInt ("ba", 33) );

 

        System.out.println ("从数组中选出最大值.");

        System.out.println (NumberUtils.max (new int[] { 1, 2, 3, 4 }) );

 

        System.out.println ("判断字符串是否全是整数.");

        System.out.println (NumberUtils.isDigits ("123.1") );

 

        System.out.println ("判断字符串是否是有效数字.");

        System.out.println (NumberUtils.isNumber ("0123.1") );

    }

 

    public void dateFormatUtilsDemo() {

        System.out.println (genHeader ("DateFormatUtilsDemo") );

        System.out.println ("格式化日期输出.");

        System.out.println (DateFormatUtils.format (System.currentTimeMillis(), "yyyy-MM-dd HH:mm:ss") );

 

        System.out.println ("秒表.");

        StopWatch sw = new StopWatch();

        sw.start();

 

        for (Iterator iterator = DateUtils.iterator (new Date(), DateUtils.RANGE_WEEK_CENTER); iterator.hasNext();) {

            Calendar cal = (Calendar) iterator.next();

            System.out.println (DateFormatUtils.format (cal.getTime(),

                                "yy-MM-dd HH:mm") );

        }

 

        sw.stop();

        System.out.println ("秒表计时:" + sw.getTime() );

 

    }

 

    private String genHeader (String head) {

        String[] header = new String[3];

        header[0] = StringUtils.repeat ("*", 50);

        header[1] = StringUtils.center ("  " + head + "  ", 50, "^O^");

        header[2] = header[0];

        return StringUtils.join (header, "\n");

    }

 

    private void validateDemo() {

        String[] strarray = {"a", "b", "c"};

        System.out.println ("验证功能");

        System.out.println (Validate.notEmpty (strarray) );

    }

 

    private void wordUtilsDemo() {

        System.out.println ("单词处理功能");

        String str1 = "wOrD";

        String str2 = "ghj\nui\tpo";

        System.out.println (WordUtils.capitalize (str1) ); //首字母大写

        System.out.println (WordUtils.capitalizeFully (str1) ); //首字母大写其它字母小写

        char[] ctrg = {'.'};

        System.out.println (WordUtils.capitalizeFully ("i aM.fine", ctrg) ); //在规则地方转换

        System.out.println (WordUtils.initials (str1) ); //获取首字母

        System.out.println (WordUtils.initials ("Ben John Lee", null) ); //取每个单词的首字母

        char[] ctr = {' ', '.'};

        System.out.println (WordUtils.initials ("Ben J.Lee", ctr) ); //按指定规则获取首字母

        System.out.println (WordUtils.swapCase (str1) ); //大小写逆转

        System.out.println (WordUtils.wrap (str2, 1) ); //解析\n和\t等字符

    }

 

    /**

    public static void main (String[] args) {

        TestLangDemo langDemo = new TestLangDemo();

 

        langDemo.charSetDemo();

        langDemo.charSetUtilsDemo();

        langDemo.objectUtilsDemo();

        langDemo.serializationUtilsDemo();

        langDemo.randomStringUtilsDemo();

        langDemo.stringUtilsDemo();

        langDemo.systemUtilsDemo();

        langDemo.classUtilsDemo();

        langDemo.stringEscapeUtilsDemo();

        langDemo.builderDemo();

        langDemo.numberUtils();

        langDemo.dateFormatUtilsDemo();

        langDemo.validateDemo();

        langDemo.wordUtilsDemo();

    }