Java determines the length of a string containing Chinese

2. Public Static boolean isletter (char c) {
4. int k = 0x80;
6. return c/k = = 0?   true: false;
8. }
12. /**
14. * Determine if the string is empty
16. * @param str
18. * @return
20. */
22. Public Static boolean isNull (String str) {
24. if (str==null| | Str.trim (). Equals ("") | | Str.trim (). Equalsignorecase ("null")) {
26. return true;
28. }else{
30. return false;
32. }
34. }
38. /**
40. * Gets the length of a string, the length of the display, a Chinese character or a Japanese-Korean length of 2, an English character length of 1
42. * @param string s need to get length strings
44. * The string length obtained @return int
46. */
48. public static int Length (String s) {
50. if (s = = null)
52. return 0;
54. char[] C = S.tochararray ();
56. int len = 0;
58. For (int i = 0; i < c.length; i++) {
60. len++;
62. if (!isletter (C[i])) {
64. len++;
66. }
68. }
70. return len;
72. }
78. /**  
80. * Gets the length of a string, the length of the display, a Chinese character or a Japanese-Korean length of 1, an English character length of 0.5
82. * @param string s need to get length strings
84. * The string length obtained @return int
86. */
88. public static double getlength (String s) {
90. double valuelength = 0;
92. String Chinese = "[\u4e00-\u9fa5]";
94. //Gets the length of the field value, if it contains Chinese characters, the length of each Chinese character is 2, otherwise 1
96. For (int i = 0; i < s.length (); i++) {
98. //Get a character
100. String temp = s.substring (i, i + 1);
102. //Determine if it is a Chinese character
104. if (temp.matches (Chinese)) {
106. //Chinese character length is 1
108. Valuelength + = 1;
110. } Else {
112. //Other character length is 0.5
114. Valuelength + = 0.5;
116. }
118. }
120. // Carry rounding
122. return Math.ceil (valuelength);
124. }
128. Reprint Source: http://blog.csdn.net/z69183787/article/details/18843925

Java determines the length of a string containing Chinese