Here you can find the source of buildQuery(final Map
public static String buildQuery(final Map<String, Object> query)
//package com.java2s;
//License from project: Open Source License
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
public class Main {
public static String buildQuery(final Map<String, Object> query)
{
if ((query == null) || query.isEmpty())
{/*from w w w .jav a 2 s .com*/
return "";
}
return query.entrySet().stream().map(entry -> createQueryElement(entry.getKey(), (entry.getValue() == null) ? null : entry.getValue().toString())).reduce((s1, s2) -> s1 + "&" + s2).orElse("");
}
public static String createQueryElement(final String key,
final String value) {
String result = encodeUTF8(key);
if (value != null) {
result += "=" + encodeUTF8(value);
}
return result;
}
public static String encodeUTF8(final String str) {
if (str == null) {
return "";
}
try {
return URLEncoder.encode(str, "UTF-8");
} catch (final UnsupportedEncodingException e) { // should never be thrown
throw new RuntimeException(e);
}
}
}