【java学习】RandomStringUtils

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  // 产生5位长度的随机字符串，中文环境下是乱码  
        String r = RandomStringUtils.random(5);  
        System.out.println(r);  
  
        // 使用指定的字符生成5位长度的随机字符串  
        r = RandomStringUtils.random(5, new char[] { 'a', 'b', 'c', 'd', 'e',  
                'f', '1', '2', '3' });  
        System.out.println(r);  
  
        // 生成指定长度的字母和数字的随机组合字符串  
        r = RandomStringUtils.randomAlphanumeric(5);  
        System.out.println(r);  
  
        // 生成随机数字字符串  
        r = RandomStringUtils.randomNumeric(5);  
        System.out.println(r);  
  
        // 生成随机[a-z]字符串，包含大小写  
        r = RandomStringUtils.randomAlphabetic(5);  
        System.out.println(r);  
  
        // 生成从ASCII 32到126组成的随机字符串  
        r = RandomStringUtils.randomAscii(4);  
        System.out.println(r);  

• Constructor and Description
  RandomStringUtils() RandomStringUtils instances should NOT be constructed in standard programming.

• Method Summary

  All Methods Static Methods Concrete Methods

  Modifier and Type	Method and Description
  static String	random(int count) Creates a random string whose length is the number of characters specified.
  static String	random(int count, boolean letters, boolean numbers) Creates a random string whose length is the number of characters specified.
  static String	random(int count, char... chars) Creates a random string whose length is the number of characters specified.
  static String	random(int count, int start, int end, boolean letters, boolean numbers) Creates a random string whose length is the number of characters specified.
  static String	random(int count, int start, int end, boolean letters, boolean numbers, char... chars) Creates a random string based on a variety of options, using default source of randomness.
  static String	random(int count, int start, int end, boolean letters, boolean numbers, char[] chars, Random random) Creates a random string based on a variety of options, using supplied source of randomness.
  static String	random(int count, String chars) Creates a random string whose length is the number of characters specified.
  static String	randomAlphabetic(int count) Creates a random string whose length is the number of characters specified.
  static String	randomAlphabetic(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.
  static String	randomAlphanumeric(int count) Creates a random string whose length is the number of characters specified.
  static String	randomAlphanumeric(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.
  static String	randomAscii(int count) Creates a random string whose length is the number of characters specified.
  static String	randomAscii(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.
  static String	randomGraph(int count) Creates a random string whose length is the number of characters specified.
  static String	randomGraph(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.
  static String	randomNumeric(int count) Creates a random string whose length is the number of characters specified.
  static String	randomNumeric(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.
  static String	randomPrint(int count) Creates a random string whose length is the number of characters specified.
  static String	randomPrint(int minLengthInclusive, int maxLengthExclusive) Creates a random string whose length is between the inclusive minimum and the exclusive maximum.