• Java代码之全角半角转换

    实现代码如下:

    public class change {

    public static void main(String[] args) {

    String QJstr=”全角转半角DAO”;

    String result=SBCchange(QJstr);

    System.out.println(QJstr+”\n”+result);

    }

    public static final String SBCchange(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;
    }

    }

    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;
    }
    }

    /**/// /
    // / 转全角的函数(SBC case)
    // /
    // /任意字符串
    // /全角字符串
    // /
    // /全角空格为12288,半角空格为32
    // /其他字符半角(33-126)与全角(65281-65374)的对应关系是:均相差65248
    // /
    public static String ToSBC(String input) {
    // 半角转全角:
    char[] c = input.toCharArray();
    for (int i = 0; i< c.length; i++) {
    if (c[i] == 32) {
    c[i] = (char) 12288;
    continue;
    }
    if (c[i]< 127)
    c[i] = (char) (c[i] + 65248);
    }
    return new String(c);
    }

    /**/// /
    // / 转半角的函数(DBC case)
    // /
    // /任意字符串
    // /半角字符串
    // /
    // /全角空格为12288,半角空格为32
    // /其他字符半角(33-126)与全角(65281-65374)的对应关系是:均相差65248
    // /
    public static String ToDBC(String input) {
    char[] c = input.toCharArray();
    for (int i = 0; i< c.length; i++) {
    if (c[i] == 12288) {
    c[i] = (char) 32;
    continue;
    }
    if (c[i]> 65280&& c[i]< 65375)
    c[i] = (char) (c[i] – 65248);
    }
    return new String(c);
    }