JAVA对特殊的字符串进行html编码

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/**
 * Created by Administrator on 2016/9/22.
 */
public class HtmlEncode {
public String HtmlEncode(String str) {
int length = str.length();
int newLength = length;
boolean someCharacterEscaped = false;
for (int i = 0; i < length; i++) {
char c = str.charAt(i);
int cint = 0xffff & c;
if (cint < 32)
switch (c) {
case 11:
default:
                        newLength--;
                        someCharacterEscaped = true;
break;

case '\t':
case '\n':
case '\f':
case '\r':
break;
                }
else
                switch (c) {
case '"':
                        newLength += 5;
                        someCharacterEscaped = true;
break;

case '&':
case '\'':
                        newLength += 4;
                        someCharacterEscaped = true;
break;

case '<':
case '>':
                        newLength += 3;
                        someCharacterEscaped = true;
break;
                }
        }
if (!someCharacterEscaped)
return str;

        StringBuffer sb = new StringBuffer(newLength);
for (int i = 0; i < length; i++) {
char c = str.charAt(i);
int cint = 0xffff & c;
if (cint < 32)
switch (c) {
case '\t':
case '\n':
case '\f':
case '\r':
                        sb.append(c);
break;
                }
else
                switch (c) {
case '"':
                        sb.append("&quot;");
break;

case '\'':
                        sb.append("&apos;");
break;

case '&':
                        sb.append("&amp;");
break;

case '<':
                        sb.append("&lt;");
break;

case '>':
                        sb.append("&gt;");
break;

default:
                        sb.append(c);
break;
                }
        }
return sb.toString();
    }
}

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