com.lone.common.util.URIUtil Maven / Gradle / Ivy
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package com.lone.common.util;
import java.io.UnsupportedEncodingException;
import org.springframework.util.StringUtils;
public class URIUtil {
private static final String ALLOWED_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.!~*'()";
public static String encodeURIComponent(String input) {
if (StringUtils.isEmpty(input)) {
return input;
}
int l = input.length();
StringBuilder o = new StringBuilder(l * 3);
try {
for (int i = 0; i < l; i++) {
String e = input.substring(i, i + 1);
if (ALLOWED_CHARS.indexOf(e) == -1) {
byte[] b = e.getBytes("utf-8");
o.append(getHex(b));
continue;
}
o.append(e);
}
return o.toString();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return input;
}
private static String getHex(byte buf[]) {
StringBuilder o = new StringBuilder(buf.length * 3);
for (int i = 0; i < buf.length; i++) {
int n = (int) buf[i] & 0xff;
o.append("%");
if (n < 0x10) {
o.append("0");
}
o.append(Long.toString(n, 16).toUpperCase());
}
return o.toString();
}
}