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SPL(Structured Process Language) A programming language specially for structured data computing.
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package com.scudata.common;
public final class Escape {
/**
* ?൱?ڵ??? add(str, '\\')
*/
public static String add( String str ) {
return add( str, '\\' );
}
/**
* Ϊ???????ַ?(\t,\r,\n,\',\"???????escapeChar)??????ָ????ת????????????²??????´?
* @param str ??Ҫ????ת??????ַ???
* @param escapeChar ת???
* @return ?´?
*/
public static String add( String str, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
char[] sb = new char[ 2 * len + 2 ]; //str.length=1
int j = 0;
for ( int i = 0; i < len; i ++ ) {
char ch = str.charAt( i );
switch ( ch ) {
case '\t':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 't';
break;
case '\r':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'r';
break;
case '\n':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'n';
break;
case '\'':
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\'';
break;
case '\"':
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\"';
break;
default:
if ( ch == escapeChar ) {
sb[ j++ ] = escapeChar;
}
sb[ j++ ] = ch;
}
}
return new String( sb, 0, j );
}
/**
* Ϊ???????ַ???????ָ????ת????????????²??????´?
*
* @param str ??Ҫ????ת??????ַ???
* @param escapedChars ??Ҫ??ת????ַ?
* @return ?´?
*/
public static String add( String str, String escapedChars ) {
return add( str, escapedChars, '\\');
}
/**
* Ϊ???????ַ???????ָ????ת????????????²??????´?
*
* @param str ??Ҫ????ת??????ַ???
* @param escapedChars ??Ҫ??ת????ַ?
* @param escapeChar ת???
* @return ?´?
*/
public static String add( String str, String escapedChars, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
char[] sb = new char[ 2 * len + 2 ]; //str.length=1
int j = 0;
for ( int i = 0; i < len; i ++ ) {
char ch = str.charAt( i );
switch ( ch ) {
case '\t':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 't';
break;
case '\r':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'r';
break;
case '\n':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'n';
break;
case '\'':
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\'';
break;
case '\"':
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\"';
break;
default:
if ((ch == escapeChar) ||
(escapedChars != null && escapedChars.indexOf(ch) >= 0))
sb[ j++ ] = escapeChar;
sb[ j++ ] = ch;
}
}
return new String( sb, 0, j );
}
public static String addEscAndQuote( String str, String escapedChars, char escapeChar ) {
return addEscAndQuote( str, true, escapedChars, escapeChar );
}
public static String addEscAndQuote( String str, boolean ifDblQuote, String escapedChars, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
char[] sb = new char[ 2 * len + 2 ]; //str.length=1
sb[0] = ifDblQuote ? '\"' : '\'';
int j = 1;
for ( int i = 0; i < len; i ++ ) {
char ch = str.charAt( i );
switch ( ch ) {
case '\t':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 't';
break;
case '\r':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'r';
break;
case '\n':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'n';
break;
case '\'':
if(!ifDblQuote)
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\'';
break;
case '\"':
if(ifDblQuote)
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\"';
break;
default:
if ((ch == escapeChar) ||
(escapedChars != null && escapedChars.indexOf(ch) >= 0))
sb[ j++ ] = escapeChar;
sb[ j++ ] = ch;
}
}
sb[j++] = ifDblQuote ? '\"' : '\'';
return new String( sb, 0, j );
}
/**
* ?൱?ڵ??? remove( str, '\\')
*/
public static String remove( String str ) {
return remove( str, '\\' );
}
/**
* ??ָ?????ַ?????ȥָ??ת????????????²??????´?
*
* @param str ??Ҫ??ȥת??????ַ???
* @param escapeChar ת???ַ?
* @return ԭ????ȥת???????´?
*/
public static String remove( String str, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
if (len == 0) return str;
char[] sb = new char[ len ];
int i = 0, j = 0;
char ch = str.charAt( i );
for ( ; i < len; i++ ) {
ch = str.charAt( i );
if ( ch == escapeChar ) {
i ++;
if ( i == len )
break;
ch = str.charAt( i );
switch ( ch ) {
case 't':
sb[ j++ ] = '\t';
break;
case 'r':
sb[ j++ ] = '\r';
break;
case 'n':
sb[ j++ ] = '\n';
break;
default:
sb[ j++ ] = ch;
}
} else
sb[ j++ ] = ch;
}
return new String( sb, 0, j );
}
/**
* ??ʹ?þ?ת??????ַ????任ʹ????ת??????ַ???
* @param str ??Ҫ?任ת????Ĵ?
* @param oldEscapeChar ??ת???
* @param newEscapeChar ??ת???
* @return ?任????´?
*/
public static String change( String str, char oldEscapeChar, char newEscapeChar ) {
if ( str == null )
return null;
int len = str.length();
if (len == 0) return str;
char[] sb = new char[ len ];
for (int i = 0 ; i < len; i++ ) {
if ( str.charAt( i ) == oldEscapeChar ) {
sb[ i++ ] = newEscapeChar;
if ( i < len )
sb[ i ] = str.charAt( i );
} else
sb[ i ] = str.charAt( i );
}
return new String( sb );
}
/**
* ?൱?ڵ??? addEscAndQuote(str, true, '\\')
*/
public static String addEscAndQuote( String str ) {
return addEscAndQuote( str, true, '\\' );
}
/**
* ?൱?ڵ??? addEscAndQuote(str, ifDblQuote, '\\')
*/
public static String addEscAndQuote( String str, boolean ifDblQuote) {
return addEscAndQuote( str, ifDblQuote, '\\' );
}
/**
* ?൱?ڵ??? addEscapeAndQuote(str, true, '\\')
*/
public static String addEscAndQuote( String str, char escapeChar) {
return addEscAndQuote( str, true, escapeChar );
}
/**
* Ϊ???????ַ???????ָ????ת???????ǰ???????ţ????????²??????´?
*
* @param str ??Ҫ????ת??????ַ???
* @param ifDblQuote Ϊtrueʱ????˫???ţ???????ϵ?????
* @param escapeChar ת???
* @return ?´?
*/
public static String addEscAndQuote( String str, boolean ifDblQuote, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
char[] sb = new char[ 2 * len + 2 ]; //str.length=1
sb[0] = ifDblQuote ? '\"' : '\'';
int j = 1;
for ( int i = 0; i < len; i ++ ) {
char ch = str.charAt( i );
switch ( ch ) {
case '\t':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 't';
break;
case '\r':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'r';
break;
case '\n':
sb[ j++ ] = escapeChar;
sb[ j++ ] = 'n';
break;
case '\'':
if(!ifDblQuote)
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\'';
break;
case '\"':
if(ifDblQuote)
sb[ j++ ] = escapeChar;
sb[ j++ ] = '\"';
break;
default:
if ( ch == escapeChar ) {
sb[ j++ ] = escapeChar;
}
sb[ j++ ] = ch;
}
}
sb[ j++ ] = ifDblQuote ? '\"' : '\'';
return new String( sb, 0, j );
}
/**
* ʹ??excel??????˫????
* @param str
* @return
*/
public static String addExcelQuote(String str) {
if ( str == null ) {
return null;
}
int len = str.length();
char[] sb = new char[ 2 * len + 2 ]; //str.length=1
sb[0] = '"';
int j = 1;
for ( int i = 0; i < len; i ++ ) {
char ch = str.charAt( i );
if (ch == '"') {
sb[ j++ ] = '"';
sb[ j++ ] = '"';
} else {
sb[ j++ ] = ch;
}
}
sb[ j++ ] = '\"';
return new String( sb, 0, j );
}
/**
* ?൱?ڵ??? removeEscAndQuote( str, '\\')
*/
public static String removeEscAndQuote( String str ) {
return removeEscAndQuote( str, '\\' );
}
/**
* ??ָ?????ַ?????ȥ????ߵ????ż?ָ??ת????????????²??????´?
*
* @param str ??Ҫ??ȥת??????ַ???
* @param escapeChar ת???ַ?
* @return ԭ????ȥת???????´?
*/
public static String removeEscAndQuote( String str, char escapeChar ) {
if ( str == null )
return null;
int len = str.length();
if (len == 0) return str;
char[] sb = new char[ len ];
int i = 0, j = 0;
char ch = str.charAt( i );
if ((ch=='"' || ch=='\'') && str.charAt( len - 1 ) == ch) {
i++;
len--;
}
for ( ; i < len; i++ ) {
ch = str.charAt( i );
if ( ch == escapeChar ) {
i ++;
if ( i == len )
break;
ch = str.charAt( i );
switch ( ch ) {
case 't':
sb[ j++ ] = '\t';
break;
case 'r':
sb[ j++ ] = '\r';
break;
case 'n':
sb[ j++ ] = '\n';
break;
default:
sb[ j++ ] = ch;
}
} else {
sb[ j++ ] = ch;
}
}
return new String( sb, 0, j );
}
public static void main(String[] args) {
String s = "a=\"(1+1)\";b=\"??salary??+1\"";
s = add(s, "()[]{}");
System.out.println(s);
s = remove(s);
System.out.println(s);
s = "\"'abc'\"+5";
System.out.println( addEscAndQuote(s) );
}
}