Repository navigation
Expand file tree
/
Copy pathStringTool.java
More file actions
62 lines (56 loc) · 1.89 KB
/
Copy pathStringTool.java
File metadata and controls
62 lines (56 loc) · 1.89 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
import java.io.UnsupportedEncodingException;
public class StringTool {
public static String cutString(String s, int length) {
try {
byte[] bytes = s.getBytes("Unicode");
int n = 0;
int i = 2;
for (; i < bytes.length && n < length; i++) {
if (i % 2 == 1) {
n++;
} else {
if (bytes[i] != 0) {
n++;
}
}
}
if (i % 2 == 1) {
if (bytes[i - 1] != 0) {
i = i - 1;
} else {
i = i + 1;
}
}
s = new String(bytes, 0, i, "Unicode");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return s;
}
//计算字符串的字节长度，一个汉字两个字节长度
//从头扫描根据字符的Ascii来获得具体的长度。如果是标准的字符，Ascii的范围是0至255，如果是汉字或其他全角字符，Ascii会大于255
public static int getWordCount(String s) {
int length = 0;
try {
for (int i = 0; i < s.length(); i++) {
int ascii = Character.codePointAt(s, i);
if (ascii >= 0 && ascii <= 255) {
length++;
} else {
length += 2;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return length;
}
public static void main(String[] args) {
// System.out.println("==>" + getWordCount("阿斯蒂芬："));
}
// public static void main(String[] args) throws UnsupportedEncodingException {
// String s = "cddfdsfsd";
// System.out.println(cutString(sss, 19));
//// System.out.println(s.substring(0, 6));
// }
}