JAVA技巧(JAVA全角和半角的轉(zhuǎn)換代碼)

實(shí)現(xiàn)代碼如下：
    public class change {
    public static void main(String[] args) {
    String QJstr="全角轉(zhuǎn)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    {
    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);
    }
    // 半角轉(zhuǎn)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;
    }
    // 全角轉(zhuǎn)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;
    }
    }
    /**/// /
    // / 轉(zhuǎn)全角的函數(shù)(SBC case)
    // /
    // /任意字符串
    // /全角字符串
    // /
    // /全角空格為12288，半角空格為32
    // /其他字符半角(33-126)與全角(65281-65374)的對應(yīng)關(guān)系是：均相差65248
    // /
    public static String ToSBC(String input) {
    // 半角轉(zhuǎn)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);
    }
    /**/// /
    // / 轉(zhuǎn)半角的函數(shù)(DBC case)
    // /
    // /任意字符串
    // /半角字符串
    // /
    // /全角空格為12288，半角空格為32
    // /其他字符半角(33-126)與考試.大提示全角(65281-65374)的對應(yīng)關(guān)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);
    }