java中实现全角半角转换
例子一:http://blog.csdn.net/lbh198408/article/details/1696546
public class Test { public static void main(String[] args) { String QJstr = "hello"; String QJstr1 = "ｈｅｈｅ"; String result = BQchange(QJstr); String result1 = QBchange(QJstr1); System.out.println(QJstr + "/n" + result); System.out.println(QJstr1 + "/n" + result1); } // 半角转全角 public static final String BQchange(String QJstr) { String outStr = ""; String Tstr = ""; byte[] b = null; for (int i = 0; i < QJstr.length(); i++) { try { Tstr = QJstr.substring(i, i + 1); b = Tstr.getBytes("unicode"); } catch (java.io.UnsupportedEncodingException e) { e.printStackTrace(); } if (b[3] != -1) { b[2] = (byte) (b[2] - 32); b[3] = -1; try { outStr = outStr + new String(b, "unicode"); } catch (java.io.UnsupportedEncodingException e) { e.printStackTrace(); } } else outStr = outStr + Tstr; } return outStr; } // 全角转半角 public static final String QBchange(String QJstr) { String outStr = ""; String Tstr = ""; byte[] b = null; for (int i = 0; i < QJstr.length(); i++) { try { Tstr = QJstr.substring(i, i + 1); b = Tstr.getBytes("unicode"); } catch (java.io.UnsupportedEncodingException e) { e.printStackTrace(); } if (b[3] == -1) { b[2] = (byte) (b[2] + 32); b[3] = 0; try { outStr = outStr + new String(b, "unicode"); } catch (java.io.UnsupportedEncodingException e) { e.printStackTrace(); } } else outStr = outStr + Tstr; } return outStr; }}例子二:http://www.cnblogs.com/caihongwu/archive/2010/01/07/1641395.html
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; }