在java中，将utf-8字符码影射成汉字
以下是一个字符码转换的工具。
在此留个记号，只能运行在jdk1.6下。
utf16这个类在jre/lib/rt.jar下。
如果有同学有更好的方法，请在此留下你的脚印。
在此留个记号，只能运行在jdk1.6下。
utf16这个类在jre/lib/rt.jar下。
/*
* (#)CharsetConvertor.java 1.0 2009-8-19
*/
package com.codelib.util;
import java.io.UnsupportedEncodingException;
import java.lang.Character.UnicodeBlock;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import sun.text.normalizer.UTF16;
/**
* @author 赵博
* @version $1.0, 2009-8-19
* @since JDK6
*/
public class CharsetConvertor
{
public static void main(String[] args)
{
try
{
String s = "中国人";
System.out.println(s);
System.out.println(s.getBytes().length);
String fullByte = CharsetConvertor.utf8ToUnicode(s);
System.out.println(fullByte);
System.out.println(CharsetConvertor.Unicode2GBK(fullByte));
System.out.println(CharsetConvertor.Unicode2GBK(fullByte).getBytes("gbk").length);
// String fullStr = new String( fullByte.getBytes(), "UTF-8");
// System.out.println("string from GBK to UTF-8 byte: " + fullStr);
}
catch (Exception e)
{
e.printStackTrace();
}
}
/**
* @param chinese
* @return
*/
public static byte[] gbk2utf8(String chinese)
{
char c[] = chinese.toCharArray();
byte[] fullByte = new byte[3 * c.length];
for (int i = 0; i < c.length; i++)
{
int m = (int) c[i];
String word = Integer.toBinaryString(m);
// System.out.println(word);
StringBuffer sb = new StringBuffer();
int len = 16 - word.length();
// 锟斤拷锟斤拷
for (int j = 0; j < len; j++)
{
sb.append("0");
}
sb.append(word);
sb.insert(0, "1110");
sb.insert(8, "10");
sb.insert(16, "10");
// System.out.println(sb.toString());
String s1 = sb.substring(0, 8);
String s2 = sb.substring(8, 16);
String s3 = sb.substring(16);
byte b0 = Integer.valueOf(s1, 2).byteValue();
byte b1 = Integer.valueOf(s2, 2).byteValue();
byte b2 = Integer.valueOf(s3, 2).byteValue();
byte[] bf = new byte[3];
bf[0] = b0;
fullByte[i * 3] = bf[0];
bf[1] = b1;
fullByte[i * 3 + 1] = bf[1];
bf[2] = b2;
fullByte[i * 3 + 2] = bf[2];
}
return fullByte;
}
/**
* utf-8 转换�?unicode
*
* @author fanhui 2007-3-15
* @param inStr
* @return
*/
public static String utf8ToUnicode(String inStr)
{
char[] myBuffer = inStr.toCharArray();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < inStr.length(); i++)
{
UnicodeBlock ub = UnicodeBlock.of(myBuffer[i]);
if (ub == UnicodeBlock.BASIC_LATIN)
{
// 英文及数字等
sb.append(myBuffer[i]);
}
else if (ub == UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS)
{
// 全角半角字符
int j = (int) myBuffer[i] - 65248;
sb.append((char) j);
}
else
{
// 汉字
short s = (short) myBuffer[i];
String hexS = Integer.toHexString(s);
String unicode = "\\u" + hexS;
sb.append(unicode.toLowerCase());
}
}
return sb.toString();
}
/**
* unicode 转换�?utf-8
*
* @author fanhui 2007-3-15
* @param theString
* @return
*/
public static String unicodeToUtf8(String theString)
{
char aChar;
int len = theString.length();
StringBuffer outBuffer = new StringBuffer(len);
for (int x = 0; x < len;)
{
aChar = theString.charAt(x++);
if (aChar == '\\')
{
aChar = theString.charAt(x++);
if (aChar == 'u')
{
// Read the xxxx
int value = 0;
for (int i = 0; i < 4; i++)
{
aChar = theString.charAt(x++);
switch (aChar)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
value = (value << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
value = (value << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
value = (value << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException("Malformed <a><font color=#4563b9>\\uxxxx</font></a> encoding.");
}
}
outBuffer.append((char) value);
}
else
{
if (aChar == 't')
aChar = '\t';
else if (aChar == 'r')
aChar = '\r';
else if (aChar == 'n')
aChar = '\n';
else if (aChar == 'f')
aChar = '\f';
outBuffer.append(aChar);
}
}
else
outBuffer.append(aChar);
}
return outBuffer.toString();
}
/**
* 中文转unicode
*
* @param str
* @return 反回unicode编码
*/
public static String GBK2Unicode(String str)
{
StringBuffer result = new StringBuffer();
for (int i = 0; i < str.length(); i++)
{
char chr1 = (char) str.charAt(i);
if (!CharsetConvertor.isNeedConvert(chr1))
{
result.append(chr1);
continue;
}
result.append("\\u" + Integer.toHexString((int) chr1));
}
return result.toString();
}
/**
* unicode转中�?
*
* @param str
* @return 中文
*/
public static String Unicode2GBK(String dataStr)
{
int index = 0;
StringBuffer buffer = new StringBuffer();
while (index < dataStr.length())
{
if (!"\\u".equals(dataStr.substring(index, index + 2)))
{
buffer.append(dataStr.charAt(index));
index++;
continue;
}
String charStr = "";
charStr = dataStr.substring(index + 2, index + 6);
char letter = (char) Integer.parseInt(charStr, 16);
try
{
System.out.println("byte length="+(letter+"").getBytes("gbk").length);
buffer.append(new String((letter+"").getBytes("gbk"),"gbk"));
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
index += 6;
}
return buffer.toString();
}
public static boolean isNeedConvert(char para)
{
return ((para & (0x00FF)) != para);
}
/**
* 将文件名中的汉字转为UTF8编码的串,以便下载时能正确显示另存的文件名.
*
* @param s
* 原文件名
* @return 重新编码后的文件名
* @author yue
*/
public static String toUtf8String(String s)
{
if (s == null || s.equals(""))
{
return null;
}
StringBuffer sb = new StringBuffer();
try
{
char c;
for (int i = 0; i < s.length(); i++)
{
c = s.charAt(i);
if (c >= 0 && c <= 255)
{
sb.append(c);
}
else
{
byte[] b;
b = Character.toString(c).getBytes("utf-8");
for (int j = 0; j < b.length; j++)
{
int k = b[j];
if (k < 0)
k += 256;
sb.append("%" + Integer.toHexString(k).toUpperCase());
}
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
return sb.toString();
}
/**
* 将10进制的utf-8字符码，映射成为汉字。
*
* @param code
* @return
*/
public static String utf8decode(String code)
{
Pattern regex = Pattern.compile("&#\\d{5};");
Matcher matcher = regex.matcher(code);
int index = 0;
while (matcher.find())
{
code = code.replaceAll(matcher.group(index), UTF16.valueOf(Integer.parseInt(matcher.group(index).replaceAll("[#&;]", ""))));
}
return code;
}
}
如果有同学有更好的方法，请在此留下你的脚印。