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public static String parseUnicode(String line){
int len=line.length();
char[] out=new char[len];//保存解析以后的结果
int outLen=0;
for(int i=0;i<len;i++){
char aChar=line.charAt(i);
if(aChar=='\\'){
aChar=line.charAt(++i);
if(aChar=='u'){
int value=0;
for(int j=0;j<4;j++){
aChar=line.charAt(++i);
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 \\uxxxx encoding.");
}
}
out[outLen++]=(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';
out[outLen++] = aChar;
}
}else{
out[outLen++] = aChar;
}
}
return new String (out, 0, outLen);
}
//调用的时候:
public static void main(String rags[])throws Exception{
BufferedReader br=new BufferedReader(new InputStreamReader(new FileInputStream("1.txt")));
String line="";
while((line=br.readLine())!=null){
System.out.println(parseUnicode(line));
}
br.close();
}