java中对全角和半角的转换处理代码

import java.io.UnsupportedEncodingException;

import java.util.regex.Pattern;

/**

* 类: <code> FullCharConverter </code>

* 功能描述: 文章的全角和半角转换

* 创建人:

* 创建日期: 2013-8-30 上午10:22:28

* 开发环境: JDK6.0

*/

public class FullCharConverter {

public static void main(String[] args) throws UnsupportedEncodingException {

String pageSplit9 = "<div style=\"page-break-after: always;\">\r\n\t<span style=\"display: none;\"> </span></div>";

String pageSplit = "<div style=\"page-break-after: always\">\r\n\t<span style=\"display: none;\"> </span></div>";

String str="xiaoqiang"+pageSplit+pageSplit9+"。" ;

String strPage=pageSplit+pageSplit9+"。";

System.out.println((pageSplit+pageSplit9).length());

String sss="";

if(str.indexOf(strPage)!=-1)

{

sss+=str.subSequence(0, str.indexOf(strPage)-1)+pageSplit+pageSplit9+str.charAt(str.indexOf(strPage)-1)+str.substring(179+str.indexOf(strPage),str.length())+"。";

}

System.out.println(str);

System.out.println("<<<<<<<<>>>>>>>>>>");

System.out.println(sss);

/* // 全角转半角

String QJstr = "hello!！ 全角转换，ＤＡＯ ５３２３２ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｄｕｖｗｙｚ　";

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　1234567890abcdefghijklmnopqrstuvwxyz,./;'<>{}";

System.out.println(str);

System.out.println(str.length());

System.out.println(half2Fullchange(str));

System.out.println(half2Fullchange(str).length());*/

}

/**

* 功能描述:全角转半角的 转换函数

* @param QJstr 需要转换的字符

* @return 返回转换后的半角字符

* @throws UnsupportedEncodingException

*/

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();

}

/**

* 功能描述:半角转全角

* @param QJstr 需要转换的字符

* @return 返回转换后的全角字符

* @throws UnsupportedEncodingException

*/

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();

}

public static final String checkSign(String QJstr)

throws UnsupportedEncodingException {

Pattern patPunc = Pattern.compile("[`~!@#$^&*()=|{}':;',\\[\\].<>/?~！@#￥……&*（）——|{}【】‘；：”“'。，、？]");

return "";

}

}