繁简体(GBBig5)字符串转化的JAVA方式实现

Big5)字符串转化的JAVA方式实现" href="http://pingyuan.itpub.net/entry/19" rel="bookmark" snap_preview_added="no">繁简体(GB<=>Big5)字符串转化的JAVA方式实现[@more@]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。

package zeal.util;
2
3	import java.io.*;
4
5	/**
6	* 用来处理GB2312/BIG5码字符互相转换的类.
7	* 需要两个码表文件:
8	* /zeal/util/gb-big5.table,/zeal/util/big5-gb.table.
9	* 这两个码表可以根据具体情况补充映射不正确的码.
10	* Title: GB<=>Big5
11	* Description: Deal with the convertion
12	* between gb2312 and big5 charset Strings.
13	* Copyright: Copyright (c) 2004
14	* Company: zeali.net
15	* @author Zeal Li
16	* @version 1.0
17	*
18	* @see zeal.util.StreamConverter
19	*/
20
21	public class GB2Big5{
22	private static GB2Big5 pInstance = null;
23	private String s_big5TableFile = null;
24	private String s_gbTableFile = null;
25	private byte[] b_big5Table = null;
26	private byte[] b_gbTable = null;
27
28	/** 指定两个码表文件来进行初始化 */
29	private GB2Big5(String sgbTableFile,String sbig5TableFile)
30	throws NullPointerException{
31	s_big5TableFile = sbig5TableFile;
32	s_gbTableFile = sgbTableFile;
33	if(null == b_gbTable){
34	b_gbTable = getBytesFromFile(sgbTableFile);
35	}
36	if(null == b_big5Table){
37	b_big5Table = getBytesFromFile(sbig5TableFile);
38	}
39	if(null == b_gbTable){
40	throw
41	new NullPointerException("No gb table can be load");
42	}
43	if(null == b_big5Table){
44	throw
45	new NullPointerException("No big5 table can be load");
46	}
47	}
48
49	public static synchronized GB2Big5 getInstance(){
50	//return getInstance("d:gb-big5.table","d:big5-gb.table");
51	return getInstance("/zeal/util/gb-big5.table",
52	"/zeal/util/big5-gb.table");
53	}
54
55	public static synchronized GB2Big5 getInstance(String sgbTableFile,
56	String sbig5TableFile){
57	if(null == pInstance){
58	try{
59	pInstance = new GB2Big5(sgbTableFile,sbig5TableFile);
60	}
61	catch(Exception e){
62	System.err.println(e.toString());
63	pInstance = null;
64	}
65	}
66
67	return pInstance;
68	}
69
70	/** 把gbChar对应的big5字符替换掉，用来更新码表文件.
71	* 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. */
72	protected synchronized void resetBig5Char(String gbChar,String big5Char)
73	throws Exception{
74	byte[] Text = new String(gbChar.getBytes(),"GBK").getBytes("GBK");
75	byte[] TextBig5 = new String(big5Char.getBytes(),
76	"BIG5").getBytes("BIG5");
77	int max = Text.length - 1;
78	int h = 0;
79	int l = 0;
80	int p = 0;
81	int b = 256;
82	byte[] big = new byte[2];
83	for(int i = 0; i < max; i++){
84	h = (int) (Text[i]);
85	if(h < 0){
86	h = b + h;
87	l = (int) (Text[i + 1]);
88	if(l < 0){
89	l = b + (int) (Text[i + 1]);
90	}
91	if(h == 161 && l == 64){
92	; // do nothing
93	}
94	else{
95	p = (h - 160) * 510 + (l - 1) * 2;
96	b_gbTable[p] = TextBig5[i];
97	b_gbTable[p + 1] = TextBig5[i + 1];
98	}
99	i++;
100	}
101	}
102
103	BufferedOutputStream pWriter =
104	new BufferedOutputStream(new FileOutputStream(s_gbTableFile));
105	pWriter.write(b_gbTable,0,b_gbTable.length);
106	pWriter.close();
107	}
108
109	/** 把big5Char对应的gb字符替换掉，用来更新码表文件.
110	* 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. */
111	protected synchronized void resetGbChar(String big5Char,String gbChar)
112	throws Exception{
113	byte[] TextGb =
114	new String(gbChar.getBytes(),"GBK").getBytes("GBK");
115	byte[] Text =
116	new String(big5Char.getBytes(),"BIG5").getBytes("BIG5");
117	int max = Text.length - 1;
118	int h = 0;
119	int l = 0;
120	int p = 0;
121	int b = 256;
122	byte[] big = new byte[2];
123	for(int i = 0; i < max; i++){
124	h = (int) (Text[i]);
125	if(h < 0){
126	h = b + h;
127	l = (int) (Text[i + 1]);
128	if(l < 0){
129	l = b + (int) (Text[i + 1]);
130	}
131	if(h == 161 && l == 64){
132	; // do nothing
133	}
134	else{
135	p = (h - 160) * 510 + (l - 1) * 2;
136	b_big5Table[p] = TextGb[i];
137	b_big5Table[p + 1] = TextGb[i + 1];
138	}
139	i++;
140	}
141	}
142
143	BufferedOutputStream pWriter =
144	new BufferedOutputStream(new FileOutputStream(s_big5TableFile));
145	pWriter.write(b_big5Table,0,b_big5Table.length);
146	pWriter.close();
147	}
148
149	/** 把gb2312编码的字符串转化成big5码的字节流 */
150	public byte[] gb2big5(String inStr) throws Exception{
151	if(null == inStr || inStr.length() <= 0){
152	return "".getBytes();
153	//return "";
154	}
155
156	byte[] Text =
157	new String(inStr.getBytes(),"GBK").getBytes("GBK");
158	int max = Text.length - 1;
159	int h = 0;
160	int l = 0;
161	int p = 0;
162	int b = 256;
163	byte[] big = new byte[2];
164	for(int i = 0; i < max; i++){
165	h = (int) (Text[i]);
166	if(h < 0){
167	h = b + h;
168	l = (int) (Text[i + 1]);
169	if(l < 0){
170	l = b + (int) (Text[i + 1]);
171	}
172	if(h == 161 && l == 64){
173	big[0] = big[1] = (byte) (161 - b);
174	}
175	else{
176	p = (h - 160) * 510 + (l - 1) * 2;
177	try{
178	big[0] = (byte) (b_gbTable[p] - b);
179	}
180	catch(Exception e){
181	big[0] = 45;
182	}
183	try{
184	big[1] = (byte) (b_gbTable[p + 1] - b);
185	}
186	catch(Exception e){
187	big[1] = 45;
188	}
189	}
190	Text[i] = big[0];
191	Text[i + 1] = big[1];
192	i++;
193	}
194
195	}
196
197	return Text;
198	//return new String(Text);
199	}
200
201	/** 把big5码的字符串转化成gb2312码的字符串 */
202	public String big52gb(String inStr) throws Exception{
203	if(null == inStr || inStr.length() <= 0){
204	return "";
205	}
206
207	byte[] Text =
208	new String(inStr.getBytes(),"BIG5").getBytes("BIG5");
209	int max = Text.length - 1;
210	int h = 0;
211	int l = 0;
212	int p = 0;
213	int b = 256;
214	byte[] big = new byte[2];
215	for(int i = 0; i < max; i++){
216	h = (int) (Text[i]);
217	if(h < 0){
218	h = b + h;
219	l = (int) (Text[i + 1]);
220	if(l < 0){
221	l = b + (int) (Text[i + 1]);
222	}
223	if(h == 161 && l == 161){
224	big[0] = (byte) (161 - b);
225	big[1] = (byte) (64 - b);
226	}
227	else{
228	p = (h - 160) * 510 + (l - 1) * 2;
229	try{
230	big[0] = (byte) (b_big5Table[p] - b);
231	}
232	catch(Exception e){
233	big[0] = 45;
234	}
235	try{
236	big[1] = (byte) (b_big5Table[p + 1] - b);
237	}
238	catch(Exception e){
239	big[1] = 45;
240	}
241	}
242	Text[i] = big[0];
243	Text[i + 1] = big[1];
244	i++;
245	}
246
247	}
248
249	return new String(Text);
250	}
251
252	/** 把文件读入字节数组，读取失败则返回null */
253	private static byte[] getBytesFromFile(String inFileName){
254	try{
255	InputStream in =
256	GB2Big5.class.getResourceAsStream(inFileName);
257	byte[] sContent = StreamConverter.toByteArray(in);
258	in.close();
259	return sContent;
260
261	/*
262	java.io.RandomAccessFile inStream =
263	new java.io.RandomAccessFile(inFileName,"r");
264	byte[] sContent = new byte[ (int) (inStream.length())];
265	inStream.read(sContent);
266	inStream.close();
267	return sContent;
268	*/
269	}
270	catch(Exception e){
271	e.printStackTrace();
272	return null;
273	}
274	}
275
276	public static void main(String[] args) throws Exception{
277	if(args.length < 2){
278	System.out.println(
279	"Usage: zeal.util.GB2Big5 [-gb | -big5] inputstring");
280	System.exit(1);
281	return;
282	}
283
284	boolean bIsGB = true;
285	String inStr = "";
286	for(int i = 0; i < args.length; i++){
287	if(args[i].equalsIgnoreCase("-gb")){
288	bIsGB = true;
289	}
290	else if(args[i].equalsIgnoreCase("-big5")){
291	bIsGB = false;
292	}
293	else{
294	inStr = args[i];
295	}
296	}
297
298	GB2Big5 pTmp = GB2Big5.getInstance();
299
300	String outStr = "";
301	if(bIsGB){
302	outStr = pTmp.big52gb(inStr);
303	}
304	else{
305	outStr = new String(pTmp.gb2big5(inStr),"BIG5");
306	}
307
308	System.out.println("String [" + inStr +
309	"] converted into:n[" + outStr + "]");
310	}
311	}

直接调用GB2Big5只适用于对于少量字符的转化，当需要对整个jsp页面根据用户需要进行编码转化
的时候，就需要使用到taglib的功能。
具体配置使用步骤如下：

1.在WEB-INF/目录下增加GB2Big5Wrapper.tld文件，内容如下:

xml version="1.0" encoding="ISO-8859-1"?>
2	/td>
3	PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
4	"http://java.sun.om/dtd/web-jsptaglibrary_1_2.dtd">
5
6	<taglib>
7	<tlib-version>1.0tlib-version>
8	<jsp-version>1.2jsp-version>
9	<short-name>zealLishort-name>
10	<tag>
11	<name>GB2Big5Wrappername>
12	<tag-class>zeal.util.GB2Big5Wrappertag-class>
13	<attribute>
14	<name>isbig5name>
15	<rtexprvalue>truertexprvalue>
16	<type>booleantype>
17	attribute>
18	tag>
19	taglib> 2.在需要进行转化的JSP页面里面加上: 任何你需要转化的东西 比如test.jsp源代码如下 => <%@ page 2 contentType="text/html; charset=GBK" 3 4 import="javax.servlet.http.HttpSession" 5 import="java.util.*" 6 import="com.zealLi.*" 7 %> 8 String encode = request.getParameter("encode"); 9 10 if(null == encode || encode.length() <= 0){ 11 encode = "BIG5"; 12 } 13 boolean isBig5 = false; 14 String charset = "GB2312"; 15 16 if(encode.equalsIgnoreCase("BIG5")){ 17 isBig5 = true; 18 charset = "BIG5"; 19 } 20 String sInfo = "中文字体繁简体转化的测试。"; 21 %>uri="/WEB-INF/GB2Big5Wrapper.tld" prefix="zealLi"%> 22 <zealLi:GB2Big5Wrapper isbig5=""> 23 <html> 24 <head> 25 <title>Jsp测试页面title> 26 <meta http-equiv="Content-Type" content="text/html; charset="> 27 head> 28 <body> 29 <% 30 Calendar now = Calendar.getInstance(); 31 out.println(now.get(Calendar.YEAR) + "." + 32 (now.get(Calendar.MONTH)+1) + "." + 33 now.get(Calendar.DAY_OF_MONTH) + "<p>"); 34 %> 35 <p> 36 <%=sInfo%> 37 body> 38 html>zealLi:GB2Big5Wrapper>

来自 “ ITPUB博客 ” ，链接：http://blog.itpub.net/7199667/viewspace-893541/，如需转载，请注明出处，否则将追究法律责任。

转载于:http://blog.itpub.net/7199667/viewspace-893541/