[Markdown-Link-String](link)

LinkString.java

package com.chargerlink.app.utils;

import com.chargerlink.app.bean.BaseBean;
import com.chargerlink.app.json.LinkStringAdapter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * chargerlink_v3
 * com.chargerlink.app.utils
 * LinkString.java
 *
 * by hayukleung
 * at 2017-01-20 16:56
 */

/**
 * markdown like link string
 *
 * @see LinkStringAdapter
 */
public class LinkString extends BaseBean implements Comparable<LinkString> {

  /**
   * [0]
   */
  public static final String REGEX = "\\[{1}([^\\[\\]\\(\\)]+)\\]\\({1}([^\\[\\]\\(\\)]+)\\)";
  /**
   * [1]
   */
  public static final String REGEX_TEXT = "\\[{1}([^\\[\\]\\(\\)]+)\\]";
  /**
   * [2]
   */
  public static final String REGEX_LINK = "\\({1}([^\\[\\]\\(\\)]+)\\)";

  /**
   * LinkString在原始内容中的位置
   */
  private int index;

  private String string;
  private String text;
  private String link;

  /**
   * 是否是链接
   */
  private boolean linkable = false;

  private Pattern mPatternString, mPatternText, mPatternLink;

  public LinkString(String string, int index) {

    mPatternString = Pattern.compile(REGEX);
    mPatternText = Pattern.compile(REGEX_TEXT);
    mPatternLink = Pattern.compile(REGEX_LINK);

    Matcher matcher = mPatternString.matcher(string);
    if (linkable = matcher.find()) {
      this.text = getText(string);
      this.link = getLink(string);
    } else {
      this.text = string;
    }
    this.string = string;
    this.index = index;
  }

  /**
   * [text](link)
   *
   * @param string
   * @return text
   */
  private String getText(String string) {
    Matcher matcher = mPatternText.matcher(string);
    if (matcher.find()) {
      String text = matcher.group();
      int length = text.length();
      return text.substring(1, length - 1);
    }
    return "";
  }

  /**
   * [text](link)
   *
   * @param string
   * @return link
   */
  private String getLink(String string) {
    Matcher matcher = mPatternLink.matcher(string);
    if (matcher.find()) {
      String link = matcher.group();
      int length = link.length();
      return link.substring(1, length - 1);
    }
    return "";
  }

  public int getIndex() {
    return index;
  }

  public String getString() {
    return string;
  }

  public String getText() {
    return text;
  }

  public String getLink() {
    return link;
  }

  public boolean isLinkable() {
    return linkable;
  }

  @Override public int compareTo(LinkString o) {
    return index - o.index;
  }
}

LinkStringTest.java

package com.chargerlink.app.utils;

import java.util.ArrayList;
import java.util.List;

import static com.chargerlink.app.utils.LinkStringUtils.parse;
import static com.chargerlink.app.utils.LinkStringUtils.show;

/**
 * chargerlink_v3
 * com.chargerlink.app.utils
 * LinkStringTest.java
 *
 * by hayukleung
 * at 2017-01-20 16:57
 */

public class LinkStringTest {

  public static void main(String[] argv) {

    /**
     * 期望输出结果：
     *
     * 00-你好！
     * 01-你好！充电网
     * 02-你好！充电网你好！
     * 03-充电网你好！
     * 04-充电网你好！充电网
     * 05-你好！充电网你好！充电网
     * 06-你好！充电网
     * 07-你好！@HayukLeung你好！
     * 08-充电网你好！
     * 09-#带你装逼带你飞#你好！充电网
     * 10-你好！充电网你好！@充电小助手
     */
    List<String> stringList = new ArrayList<>(11);
    stringList.add("00-你好！");

    stringList.add("01-你好！[充电网](http://www.chargerlink.com)");
    stringList.add("02-你好！[充电网](http://www.chargerlink.com)你好！");
    stringList.add("03-[充电网](http://www.chargerlink.com)你好！");
    stringList.add("04-[充电网](http://www.chargerlink.com)你好！[充电网](http://www.chargerlink.com)");
    stringList.add("05-你好！[充电网](http://www.chargerlink.com)你好！[充电网](http://www.chargerlink.com)");

    stringList.add("06-你好！[充电网](http://www.chargerlink.com)");
    stringList.add("07-你好！[@HayukLeung](https://github.com/hayukleung)你好！");
    stringList.add("08-[充电网](http://www.chargerlink.com)你好！");
    stringList.add(
        "09-[#带你装逼带你飞#](http://www.chargerlink.com)你好！[充电网](http://www.chargerlink.com)");
    stringList.add(
        "10-你好！[充电网](http://www.chargerlink.com)你好！[@充电小助手](http://www.chargerlink.com)");

    for (String string : stringList) {
      List<LinkString> linkStringList = parse(string);
      // 打印结果
      System.out.println(show(linkStringList));
    }
  }
}

LinkStringUtils.java

package com.chargerlink.app.utils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static com.chargerlink.app.utils.LinkString.REGEX;

/**
 * chargerlink_v3
 * com.chargerlink.app.utils
 * LinkStringUtils.java
 *
 * by hayukleung
 * at 2017-01-25 14:49
 */

public class LinkStringUtils {

  /**
   * 解析
   *
   * @param string
   * @see LinkStringTest
   */
  public static List<LinkString> parse(String string) {
    List<LinkString> linkStringList = new ArrayList<>();
    Pattern patternString = Pattern.compile(REGEX);
    Matcher matcher = patternString.matcher(string);
    int index = 0;
    while (matcher.find()) {
      String linkString = matcher.group();
      int tempIndex = string.indexOf(linkString, index);
      if (index == tempIndex && 0 != linkStringList.size() && tempIndex == linkStringList.get(
          linkStringList.size() - 1).getIndex()) {
        tempIndex = string.indexOf(linkString, index + 1);
      }
      index = tempIndex;
      linkStringList.add(new LinkString(linkString, index));
    }
    List<LinkString> tempList = new ArrayList<>();
    index = 0;
    for (LinkString linkString : linkStringList) {
      if (linkString.getIndex() > index) {
        tempList.add(new LinkString(string.substring(index, linkString.getIndex()), index));
      }
      index = linkString.getIndex() + linkString.getString().length();
    }
    linkStringList.addAll(tempList);
    if (index < string.length() - 1) {
      linkStringList.add(new LinkString(string.substring(index, string.length()), index));
    }
    // 排序
    Collections.sort(linkStringList);
    return linkStringList;
  }

  /**
   * 获取展示内容
   * TODO 超链接点击处理
   * TODO Emoji表情处理
   *
   * @param linkStringList
   */
  public static String show(List<LinkString> linkStringList) {
    if (null == linkStringList || 0 == linkStringList.size()) {
      return "";
    } else {
      String result = "";
      for (LinkString linkString : linkStringList) {
        result += linkString.getText();
      }
      return result;
    }
  }
}