import java.util.ArrayList;
4. import java.util.List;
5. import java.util.Random;
6. import java.util.UUID;
7.
8. /**
9. * 工具类 - 公用
10. *
19. */
20.
21. public class CommonUtil {
22.
23. /**
24. * 随机获取UUID字符串(无中划线)
25. *
26. * @return UUID字符串
27. */
28. public static String getUUID() {
29. String uuid = UUID.randomUUID().toString();
30. return uuid.substring(0, 8) + uuid.substring(9, 13) + uuid.substring(14, 18) + uuid.substring(19, 23) + uuid.substring(24);
31. }
32.
33. /**
34. * 随机获取字符串
35. *
36. * @param length
37. * 随机字符串长度
38. *
39. * @return 随机字符串
40. */
41. public static String getRandomString(int length) {
42. if (length <= 0) {
43. return "";
44. }
45. char[] randomChar = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a', 's', 'd',
46. 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm' };
47. Random random = new Random();
48. StringBuffer stringBuffer = new StringBuffer();
49. for (int i = 0; i < length; i++) {
50. stringBuffer.append(randomChar[Math.abs(random.nextInt()) % randomChar.length]);
51. }
52. return stringBuffer.toString();
53. }
54.
55. /**
56. * 根据指定长度 分隔字符串
57. *
58. * @param str
59. * 需要处理的字符串
60. * @param length
61. * 分隔长度
62. *
63. * @return 字符串集合
64. */
65. public static List<String> splitString(String str, int length) {
66. List<String> list = new ArrayList<String>();
67. for (int i = 0; i < str.length(); i += length) {
68. int endIndex = i + length;
69. if (endIndex <= str.length()) {
70. list.add(str.substring(i, i + length));
71. } else {
72. list.add(str.substring(i, str.length() - 1));
73. }
74. }
75. return list;
76. }
77.
78. /**
79. * 将字符串List转化为字符串，以分隔符间隔.
80. *
81. * @param list
82. * 需要处理的List.
83. *
84. * @param separator
85. * 分隔符.
86. *
87. * @return 转化后的字符串
88. */
89. public static String toString(List<String> list, String separator) {
90. StringBuffer stringBuffer = new StringBuffer();
91. for (String str : list) {
92. stringBuffer.append(separator + str);
93. }
94. stringBuffer.deleteCharAt(0);
95. return stringBuffer.toString();
96. }
97.
98. }
