xss遇到的utf-7编码转utf-8编码示例

在一个xss题目中遇到的这个编码问题，utf-7和mutf-7这个编码是邮件使用的，javamail应该支持，使用utf-7这个还是比较少见的编码可以进行一些xss应用。使用原生jdk会报不支持utf-7编码的错误，这是sun jdk的bug。开源的jcharset.jar是个解决方案。将此jar包buildpath之后，就可以使用了。写了一个小程序，将编码转过来！

 
public static void main(String[] args) {
//将要转义的utf-7编码格式的写在bf里，将在d盘以utf-8格式写出一个txt
//构造stringbuffer
StringBuffer bf = new StringBuffer("+ADwAcwBjAHIAaQBwAHQAPgB3AGkAbgBkAG8AdwAuAGwAbwBjAGEAdABpAG8AbgAuAGgAcgBlAGYAPQAiAHUAdABmAC0ANwAuAHAAaABwACIAPAAvAHMAYwByAGkAcAB0AD4-");
try {
OutputStream outputStream = new FileOutputStream("d:\\utf-8.txt");
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream,"utf-8");
//显示文件被用什么格式编码
//System.out.println(outputStreamWriter.getEncoding());
//io流的写出
BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);
bufferedWriter.write(new String(bf.toString().getBytes("utf-8"),"utf-7"));
bufferedWriter.flush();
bufferedWriter.close();
bufferedWriter = null;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}