📄 繁简体(gb=big5)字符串转化的java方式实现 zeal blog - 泽欧里的网络日志.htm
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<DIV class=entry_introduce>本文提供一个java实现中文字符繁简体互换的zip包以及主要的源代码实现说明。</DIV></DIV>
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<P>繁简体(GB<=>Big5)中文字符的转化实现原理很简单，就是根据两种码表的编码规则，创建两者之间的字符对应关系表，通过程序读取这个映射表来自动查出另一种编码方式下对应字符的字节编码，从而进行逐字节的内容替换。 </P>
<P>主功能实现的GB2Big5.java源代码如下:<LINK
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<TEXTAREA class=java name=dp_sourcecode rows=20 cols=60>package zeal.util;
import java.io.*;
/**
* 用来处理GB2312/BIG5码字符互相转换的类.
* 需要两个码表文件:
* /zeal/util/gb-big5.table,/zeal/util/big5-gb.table.
* 这两个码表可以根据具体情况补充映射不正确的码.
* <p>Title: GB<=>Big5</p>
* <p>Description: Deal with the convertion
* between gb2312 and big5 charset Strings.</p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: zeali.net</p>
* @author Zeal Li
* @version 1.0
*
* @see zeal.util.StreamConverter
*/
public class GB2Big5{
private static GB2Big5 pInstance = null;
private String s_big5TableFile = null;
private String s_gbTableFile = null;
private byte[] b_big5Table = null;
private byte[] b_gbTable = null;
/** 指定两个码表文件来进行初始化 */
private GB2Big5(String sgbTableFile,String sbig5TableFile)
throws NullPointerException{
s_big5TableFile = sbig5TableFile;
s_gbTableFile = sgbTableFile;
if(null == b_gbTable){
b_gbTable = getBytesFromFile(sgbTableFile);
}
if(null == b_big5Table){
b_big5Table = getBytesFromFile(sbig5TableFile);
}
if(null == b_gbTable){
throw
new NullPointerException("No gb table can be load");
}
if(null == b_big5Table){
throw
new NullPointerException("No big5 table can be load");
}
}
public static synchronized GB2Big5 getInstance(){
//return getInstance("d:\\gb-big5.table","d:\\big5-gb.table");
return getInstance("/zeal/util/gb-big5.table",
"/zeal/util/big5-gb.table");
}
public static synchronized GB2Big5 getInstance(String sgbTableFile,
String sbig5TableFile){
if(null == pInstance){
try{
pInstance = new GB2Big5(sgbTableFile,sbig5TableFile);
}
catch(Exception e){
System.err.println(e.toString());
pInstance = null;
}
}
return pInstance;
}
/** 把gbChar对应的big5字符替换掉，用来更新码表文件.
* 一般当发现字符映射不正确的时候可以通过这个方法来校正. */
protected synchronized void resetBig5Char(String gbChar,String big5Char)
throws Exception{
byte[] Text = new String(gbChar.getBytes(),"GBK").getBytes("GBK");
byte[] TextBig5 = new String(big5Char.getBytes(),
"BIG5").getBytes("BIG5");
int max = Text.length - 1;
int h = 0;
int l = 0;
int p = 0;
int b = 256;
byte[] big = new byte[2];
for(int i = 0; i < max; i++){
h = (int) (Text[i]);
if(h < 0){
h = b + h;
l = (int) (Text[i + 1]);
if(l < 0){
l = b + (int) (Text[i + 1]);
}
if(h == 161 && l == 64){
; // do nothing
}
else{
p = (h - 160) * 510 + (l - 1) * 2;
b_gbTable[p] = TextBig5[i];
b_gbTable[p + 1] = TextBig5[i + 1];
}
i++;
}
}
BufferedOutputStream pWriter =
new BufferedOutputStream(new FileOutputStream(s_gbTableFile));
pWriter.write(b_gbTable,0,b_gbTable.length);
pWriter.close();
}
/** 把big5Char对应的gb字符替换掉，用来更新码表文件.
* 一般当发现字符映射不正确的时候可以通过这个方法来校正. */
protected synchronized void resetGbChar(String big5Char,String gbChar)
throws Exception{
byte[] TextGb =
new String(gbChar.getBytes(),"GBK").getBytes("GBK");
byte[] Text =
new String(big5Char.getBytes(),"BIG5").getBytes("BIG5");
int max = Text.length - 1;
int h = 0;
int l = 0;
int p = 0;
int b = 256;
byte[] big = new byte[2];
for(int i = 0; i < max; i++){
h = (int) (Text[i]);
if(h < 0){
h = b + h;
l = (int) (Text[i + 1]);
if(l < 0){
l = b + (int) (Text[i + 1]);
}
if(h == 161 && l == 64){
; // do nothing
}
else{
p = (h - 160) * 510 + (l - 1) * 2;
b_big5Table[p] = TextGb[i];
b_big5Table[p + 1] = TextGb[i + 1];
}
i++;
}
}
BufferedOutputStream pWriter =
new BufferedOutputStream(new FileOutputStream(s_big5TableFile));
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