关于全角转半角的问题,在Unicode中,标点、数字、字母的半角编码最高位均为0,它们的全角编码与半角编码的第三位相差32h。
public class Test
{
public static void main(String [] args)
{
String QJstr="HELLO";
String QJstr1="HELLO";
String result=BQchange(QJstr);
String result1=QBchange(QJstr1);
System.out.println(QJstr+"\n"+result);
System.out.println(QJstr1+"\n"+result1);
}
//半角转全角
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;
}
//全角转半角
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;
}
}
输出结果为:
HELLO
HELLO
HELLO
HELLO
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posted on 2007-01-16 23:10
小石头 阅读(605)
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