（转载）JAVA全角半角转换

来源：互联网发布：java 短信验证码校验编辑：程序博客网时间：2024/04/30 02:08

转自：http://blog.csdn.net/wanghangzhou1984/article/details/5950440

import java.io.UnsupportedEncodingException;public class FullCharConverter {public static void main(String[] args) throws UnsupportedEncodingException {// 全角转半角String QJstr = "hello!！ 全角转换，ＤＡＯ ５３２３２　";String result = full2HalfChange(QJstr);System.out.println(QJstr);System.out.println(result);System.out.println("------------------------------------");// 半角转全角String str = "java 汽车 召回 2345";System.out.println(str);System.out.println(half2Fullchange(str));}// 全角转半角的 转换函数public static final String full2HalfChange(String QJstr)throws UnsupportedEncodingException {StringBuffer outStrBuf = new StringBuffer("");String Tstr = "";byte[] b = null;for (int i = 0; i < QJstr.length(); i++) {Tstr = QJstr.substring(i, i + 1);// 全角空格转换成半角空格if (Tstr.equals("　")) {outStrBuf.append(" ");continue;}b = Tstr.getBytes("unicode");// 得到 unicode 字节数据if (b[2] == -1) {// 表示全角？b[3] = (byte) (b[3] + 32);b[2] = 0;outStrBuf.append(new String(b, "unicode"));} else {outStrBuf.append(Tstr);}} // end for.return outStrBuf.toString();}// 半角转全角public static final String half2Fullchange(String QJstr)throws UnsupportedEncodingException {StringBuffer outStrBuf = new StringBuffer("");String Tstr = "";byte[] b = null;for (int i = 0; i < QJstr.length(); i++) {Tstr = QJstr.substring(i, i + 1);if (Tstr.equals(" ")) {// 半角空格outStrBuf.append(Tstr);continue;}b = Tstr.getBytes("unicode");if (b[2] == 0) {// 半角?b[3] = (byte) (b[3] - 32);b[2] = -1;outStrBuf.append(new String(b, "unicode"));} else {outStrBuf.append(Tstr);}}return outStrBuf.toString();}}