TA的每日心情 | 开心 2021-3-12 23:18 |
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签到天数: 2 天 [LV.1]初来乍到
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- class EscapeUnescape{
- public static String escape (String src) {
- int i;
- char j;
- StringBuffer tmp = new StringBuffer();
- tmp.ensureCapacity(src.length()*6);
- for (i=0;i< src.length() ;i++ ) {
- j = src.charAt(i);
- if (Character.isDigit(j) || Character.isLowerCase(j)
- || Character.isUpperCase(j))
- tmp.append(j);
- else if (j< 256) {
- tmp.append( "%" );
- if (j< 16)
- tmp.append( "0" );
- tmp.append( Integer.toString(j,16) );
- }else{
- tmp.append( "%u" );
- tmp.append( Integer.toString(j,16) );
- }
- }
- return tmp.toString();
- }
- public static String unescape (String src) {
- StringBuffer tmp = new StringBuffer();
- tmp.ensureCapacity(src.length());
- int lastPos=0,pos=0;
- char ch;
- while (lastPos< src.length()) {
- pos = src.indexOf("%",lastPos);
- if (pos == lastPos){
- if (src.charAt(pos+1)=="u"){
- ch = (char)Integer.parseInt(src.substring(pos+2,pos+6),16);
- tmp.append(ch);
- lastPos = pos+6;
- }else{
- ch = (char)Integer.parseInt(src.substring(pos+1,pos+3),16);
- tmp.append(ch);
- lastPos = pos+3;
- }
- }else{
- if (pos == -1){
- tmp.append(src.substring(lastPos));
- lastPos=src.length();
- }else{
- tmp.append(src.substring(lastPos,pos));
- lastPos=pos;
- }
- }
- }
- return tmp.toString();
- }
- public static void main(String[] args) {
- String tmp=" ~!@#$%^&*()_+|\=-,./?><;"][{}"";
- System.out.println("testing escape : "+tmp);
- tmp =escape(tmp);
- System.out.println(tmp);
- System.out.println("testing unescape :"+tmp);
- System.out.println(unescape(tmp));
- }
- }
复制代码
程序运行结果:
C:java>java EscapeUnescape
testing escape : ~!@#$%^&*()_+|=-,./?><;"][{}"
%20%7e%21%40%23%24%25%5e%26%2a%28%29%5f%2b%7c%5c%3d%2d%2c%2e%2f%3f%3e%3c%3b%27%5
d%5b%7b%7d%22
testing unescape :%20%7e%21%40%23%24%25%5e%26%2a%28%29%5f%2b%7c%5c%3d%2d%2c%2e%2
f%3f%3e%3c%3b%27%5d%5b%7b%7d%22
~!@#$%^&*()_+|=-,./?><;"][{}" C:java>
源码下载:http://file.javaxxz.com/2014/10/30/000016796.zip |
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