net.yoomai.wechat.utils.StringUtils.java Source code

Introduction

Here is the source code for net.yoomai.wechat.utils.StringUtils.java

Source

/**
 * Copyright (c) 2014, wolaiyee.com. All rights reserved.
 * wolaiyee.com. Use is subject to license terms.
 */
package net.yoomai.wechat.utils;

import com.google.common.base.Charsets;
import com.google.common.hash.Hashing;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;
import java.util.Random;

/**
 * ?
 *
 * @author Ray & coffeefoam@126.com & http://github.com/coffeefoam
 * @(#)StringUtils.java 1.0 27/11/2015
 */
public class StringUtils {
    private static final Logger log = LoggerFactory.getLogger(StringUtils.class);

    /**
     * ?????
     *
     * @param parameters ?map
     * @param sort       ??
     * @return
     */
    public static String generateQueryString(Map<String, Object> parameters, boolean sort) {
        ArrayList<String> list = new ArrayList<String>();
        for (Map.Entry<String, Object> entry : parameters.entrySet()) {
            // log.debug("?{}", entry.getKey());
            if (!"".equals(entry.getValue())) {
                list.add(entry.getKey() + "=" + entry.getValue());
            }
        }

        String[] arrayToSort = list.toArray(new String[list.size()]);
        if (sort) {
            Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
        }
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < list.size(); i++) {
            buffer.append(arrayToSort[i]);
            if (i < (list.size() - 1)) {
                buffer.append("&");
            }
        }
        log.debug(": {}", buffer.toString());
        return buffer.toString();
    }

    /**
     * ??
     *
     * @param length
     * @return
     */
    public static String randomString(int length) {
        String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

        Random random = new Random();
        StringBuffer buffer = new StringBuffer(length);
        for (int i = 0; i < length; i++) {
            buffer.append(base.charAt(random.nextInt(base.length())));
        }

        return buffer.toString();
    }

    /**
     * ????
     *
     * @param params  ?ASCII ????
     * @param encrypt ? SHA1 MD5
     * @return
     */
    public static String signature(String buffer, String encrypt, boolean toUpperCase) {
        String sign = "";

        if ("MD5".equals(encrypt)) {
            // MD5
            sign = Hashing.md5().hashString(buffer, Charsets.UTF_8).toString();
        } else if ("SHA1".equals(encrypt)) {
            // SHA1
            sign = Hashing.sha1().hashString(buffer, Charsets.UTF_8).toString();
        }

        if (toUpperCase) {
            sign = sign.toUpperCase();
        }

        return sign;
    }

    /**
     * ????
     *
     * @param params  ?ASCII ????
     * @param encrypt ? SHA1 MD5
     * @return
     */
    public static String signature(Map params, String encrypt, boolean toUpperCase) {
        String sign = "";
        // ?
        String buffer = generateQueryString(params, true);

        // log.debug(" => {}", buffer.toString());
        if ("MD5".equals(encrypt)) {
            // MD5
            sign = Hashing.md5().hashString(buffer, Charsets.UTF_8).toString();
        } else if ("SHA1".equals(encrypt)) {
            // SHA1
            sign = Hashing.sha1().hashString(buffer, Charsets.UTF_8).toString();
        }
        // log.debug("? <=> {}", sign);

        if (toUpperCase) {
            sign = sign.toUpperCase();
        }

        return sign;
    }

}