经典java转码程序，有备无患！实现和 jdk\bin\native2ascii.exe 同样的功能

private String convert(String str)

{

String tmp;

StringBuffer sb = new StringBuffer(1000);

char c;

int i, j;

sb.setLength(0);

for(i = 0;i<str.length();i++){

c = str.charAt(i);

if (c > 255) {

sb.append("\\u");

j = (c >>> 8);

tmp = Integer.toHexString(j);

if (tmp.length() == 1) sb.append("0");

sb.append(tmp);

j = (c & 0xFF);

tmp = Integer.toHexString(j);

if (tmp.length() == 1) sb.append("0");

sb.append(tmp);

}

else {

sb.append(c);

}

}return(new String(sb));

}