程序設(shè)計:關(guān)于字符串的一些處理技巧

import java.util.*；
    /** *
    文件標題：
    *關(guān)于字符串的一些處理方法：
    * @版本 1.0
    */
    public class StringUtil {
    public StringUtil() {
    }
    /**
    * @description 字符串替代函數(shù)
    * @param source String 源字符串
    * @param be_rep_str String 需要被替換的子串
    * @param rep_str String 要替換的目標串
    * @param return_str String
    * @return String
    */
    public static String replaceStr(String source, String be_rep_str,
    String rep_str, String return_str) {
    if (source.indexOf(be_rep_str) < 0) {
    return source;
    }
    else {
    String head = source.substring(0, source.indexOf(be_rep_str));
    String body = rep_str +
    source.substring(source.indexOf(be_rep_str) + be_rep_str.length());
    return_str = replaceStr(head + body, be_rep_str, rep_str,
    return_str);
    }
    return return_str;
    }
    public static String[] getFields(String test, String sep) { //坼分字符,將字句test按照sep進行坼分。
    sep = "u0020";
    if (test.indexOf(sep) != -1) {
    if ( (test.indexOf(sep) > test.indexOf("#")) &&
    test.indexOf("#") != -1) {
    sep = "#";
    }
    }
    else {
    sep = "#";
    }
    String[] st;
    List flds = new ArrayList();
    if (sep.equals("u0020")) {
    StringTokenizer stto = new StringTokenizer(test.trim(), sep);
    while (stto.hasMoreTokens()) {
    flds.add(stto.nextToken());
    }
    st = (String[]) flds.toArray(new String[stto.countTokens()]);
    }
    else {
    st = test.trim().split(sep);
    }
    return st;
    }
    //public String DBC2SBC(String str)
    //{
    //int i ;
    //String result = "";
    //for (i = 0 ; i < str.length(); i++)
    //{
    //code = str.charCodeAt(i) ;
    //// “65281”是“！”，“65373”是“｝”
    //if (code >= 65281 && code < 65373)
    ////“65248”是轉(zhuǎn)換碼距
    //result += String.fromCharCode(str.charCodeAt(i) - 65248) ;
    //else
    //result += str.charAt(i) ;
    //}
    //return result ;
    //}
    /**
    * 半角 DBC case -> 全角 SBC case
    * @param QJstr String
    * @return String
    */　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)換成 -> 半角
    * @param QJstr String
    * @return String
    */
    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;
    }
    public static void main(String aa[]) {
    String qj = "＃?￥％……?＊（）";
    String bj = "#@$%^&*()";
    System.out.println("半角轉(zhuǎn)換成全角：" + bj + "-->" + BQchange(bj));
    String s = " ";
    String qs = "";
    System.out.println("全角轉(zhuǎn)換成半角："+qj + " -->" + QBchange(qj));
    System.out.println( (int) (QBchange(qs).toCharArray()[0]));
    System.out.println( (int) s.toCharArray()[0]);
    String dd[] = getFields("23#99#99#99", "#");
    for (int i = 0; i < dd.length; i++) {
    System.out.println("asfd" + dd[i]);
    }
    System.out.println(dd.length);
    }
    }