获取字符串(代码格式)的函数

在产生java代码文件时,我们常常会遇到要讲字java符串转换成代码格式.
比如回车要编程字符串"\n"等.

static javaresearch.org/source/jdk142/java/lang/String.java.html" target="_blank">String getEscapeString(javaresearch.org/source/jdk142/java/lang/String.java.html" target="_blank">String str) {
if (str == null) {
return null;
}
char[] bys = new char[str.length()];
str.getChars(0, str.length(), bys, 0);
javaresearch.org/source/jdk142/java/lang/StringBuffer.java.html" target="_blank">StringBuffer ttsb = new javaresearch.org/source/jdk142/java/lang/StringBuffer.java.html" target="_blank">StringBuffer();
for (int k = 0; k < bys.length; k++) {
switch (bys[k]) {
case '\\':
case '\'':
case '\"':
ttsb.append("\\");
ttsb.append( (char) bys[k]);
break;
case '\r':
ttsb.append("\\r");
break;
case '\n':
ttsb.append("\\n");
break;
case '\t':
ttsb.append("\\t");
break;
default:
if (bys[k] < ' ' || bys[k] >= '\200') {
//System.out.println("unicode...");
ttsb.append("\\u" /*243*/);
javaresearch.org/source/jdk142/java/lang/String.java.html" target="_blank">String s13 = javaresearch.org/source/jdk142/java/lang/Integer.java.html" target="_blank">Integer.toHexString(bys[k]);
for (int l = s13.length(); l < 4; l++) {
ttsb.append('0');
}
ttsb.append(s13);
} else {
ttsb.append( (char) bys[k]);
}
}
}
return ttsb.toString();
}