java.net.URLEncoder.encode(String) is deprecated, what should I use instead?

Question

I get the following warning when using java.net.URLEncoder.encode:

warning: [deprecation] encode(java.lang.String)
         in java.net.URLEncoder has         


        

Answer 1

You should use:

URLEncoder.encode("NAME", "UTF-8");

Answer 2

Use the other encode method in URLEncoder:

URLEncoder.encode(String, String)

The first parameter is the text to encode; the second is the name of the character encoding to use (e.g., UTF-8). For example:

System.out.println(
  URLEncoder.encode(
    "urlParameterString",
    java.nio.charset.StandardCharsets.UTF_8.toString()
  )
);

Answer 3

Use the class URLEncoder:

URLEncoder.encode(String s, String enc)

Where :

s - String to be translated.

enc - The name of a supported character encoding.

Standard charsets:

US-ASCII Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character set ISO-8859-1 ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1

UTF-8 Eight-bit UCS Transformation Format

UTF-16BE Sixteen-bit UCS Transformation Format, big-endian byte order

UTF-16LE Sixteen-bit UCS Transformation Format, little-endian byte order

UTF-16 Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark

Example:

import java.net.URLEncoder;

String stringEncoded = URLEncoder.encode(
    "This text must be encoded! aeiou áéíóú ñ, peace!", "UTF-8");

Answer 4

The usage of org.apache.commons.httpclient.URI is not strictly an issue; what is an issue is that you target the wrong constructor, which is depreciated.

Using just

new URI( [string] );

Will indeed flag it as depreciated. What is needed is to provide at minimum one additional argument (the first, below), and ideally two:

1. escaped: true if URI character sequence is in escaped form. false otherwise.
2. charset: the charset string to do escape encoding, if required

This will target a non-depreciated constructor within that class. So an ideal usage would be as such:

new URI( [string], true, StandardCharsets.UTF_8.toString() );

A bit crazy-late in the game (a hair over 11 years later - egad!), but I hope this helps someone else, especially if the method at the far end is still expecting a URI, such as org.apache.commons.httpclient.setURI().

Answer 5

The first parameter is the String to encode; the second is the name of the character encoding to use (e.g., UTF-8).

Answer 6

As an additional reference for the other responses, instead of using "UTF-8" you can use:

HTTP.UTF_8

which is included since Java 4 as part of the org.apache.http.protocol library, which is included also since Android API 1.