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public class Test {2
public static void main(String[] args) {3
String QJstr = "hello";4
String QJstr1 = "ｈｅｈｅ";5
6
String result = BQchange(QJstr);7
String result1 = QBchange(QJstr1);8
9
System.out.println(QJstr + "/n" + result);10
System.out.println(QJstr1 + "/n" + result1);11
}12
13
// 半角转全角14
public static final String BQchange(String QJstr) {15
String outStr = "";16
String Tstr = "";17
byte[] b = null;18
19
for (int i = 0; i < QJstr.length(); i++) {20
try {21
Tstr = QJstr.substring(i, i + 1);22
b = Tstr.getBytes("unicode");23
} catch (java.io.UnsupportedEncodingException e) {24
e.printStackTrace();25
}26
if (b[3] != -1) {27
b[2] = (byte) (b[2] - 32);28
b[3] = -1;29
try {30
outStr = outStr + new String(b, "unicode");31
} catch (java.io.UnsupportedEncodingException e) {32
e.printStackTrace();33
}34
} else35
outStr = outStr + Tstr;36
}37
return outStr;38
}39
40
// 全角转半角41
public static final String QBchange(String QJstr) {42
String outStr = "";43
String Tstr = "";44
byte[] b = null;45
46
for (int i = 0; i < QJstr.length(); i++) {47
try {48
Tstr = QJstr.substring(i, i + 1);49
b = Tstr.getBytes("unicode");50
} catch (java.io.UnsupportedEncodingException e) {51
e.printStackTrace();52
}53
if (b[3] == -1) {54
b[2] = (byte) (b[2] + 32);55
b[3] = 0;56
try {57
outStr = outStr + new String(b, "unicode");58
} catch (java.io.UnsupportedEncodingException e) {59
e.printStackTrace();60
}61
} else62
outStr = outStr + Tstr;63
}64
return outStr;65
}66
}public static void main(String[] args) {
String QJstr = "wch";
String QJstr1 = "ｈｅｌｌｏ";
String result = ToSBC(QJstr);
String result1 = ToDBC(QJstr1);
System.out.println(QJstr + "\n" + result);
System.out.println(QJstr1 + "\n" + result1);
}
网上转的一个半角全角互换的函数：
/**
* 半角转全角
* @param input String.
* @return 全角字符串.
*/
public static String ToSBC(String input) {
char c[] = input.toCharArray();
for (int i = 0; i < c.length; i++) {
if (c[i] == ' ') {
c[i] = '\u3000';
} else if (c[i] < '\177') {
c[i] = (char) (c[i] + 65248);
}
}
return new String(c);
}
/**
* 全角转半角
* @param input String.
* @return 半角字符串
*/
public static String ToDBC(String input) {
char c[] = input.toCharArray();
for (int i = 0; i < c.length; i++) {
if (c[i] == '\u3000') {
c[i] = ' ';
} else if (c[i] > '\uFF00' && c[i] < '\uFF5F') {
c[i] = (char) (c[i] - 65248);
}
}
String returnString = new String(c);
return returnString;
}
