Java URL Decode decode( Map source, String encoding)

Description

Decode all the keys and values based on the encoding.

License

Educational Community License

Declaration

public static Map<String, String[]> decode(
        Map<String, String[]> source, String encoding) 

Method Source Code

//package com.java2s;
//License from project: Educational Community License 

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import java.util.HashMap;

import java.util.Map;

public class Main {
    /**//  w w  w  .  j ava2s  . c om
     * Decode all the keys and values based on the encoding.
     */
    public static Map<String, String[]> decode(
            Map<String, String[]> source, String encoding) {
        try {
            Map<String, String[]> decoded = new HashMap<String, String[]>();
            for (Map.Entry<String, String[]> entry : source.entrySet()) {
                String key = URLDecoder.decode(entry.getKey(), encoding);
                String[] values = new String[entry.getValue().length];
                for (int i = 0; i < entry.getValue().length; i++) {
                    values[i] = (entry.getValue()[i] == null) ? null
                            : URLDecoder.decode(entry.getValue()[i],
                                    encoding);
                }
                decoded.put(key, values);
            }
            return decoded;
        } catch (UnsupportedEncodingException uee) {
            throw new IllegalArgumentException("Unsupported encoding: "
                    + encoding);
        }
    }

    /**
     * Just gets the first value for the key out of the map.
     * @param params
     * @param key
     * @return The value or <code>null</code> if it isn't found or is null.
     */
    public static String getValue(Map<String, String[]> params, String key) {
        String[] values = params.get(key);
        if (values != null) {
            if (values.length > 0) {
                if (values.length > 1) {
                    // Too many values, dropping one.
                }
                return values[0];
            }
        }
        return null;
    }
}

Related

1. addParam(Map properties, String strParams, boolean bDecodeString)
2. decode(final String content, final String encoding)
3. decode(final String s, final String enc)
4. decode(final String string)
5. decode(Object value)