搜索结果高亮显示

代码片段

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

public class FontUtils {

    //高亮替换
    public static String cssTitle(String keyWord,String title) {

        if(StringUtils.isNotEmpty(keyWord)) {
            //不区分大小写
            Pattern pattern = Pattern.compile(keyWord, Pattern.CASE_INSENSITIVE);
            Matcher matcher = pattern.matcher(title);

            // 查找字符串中是否有匹配正则表达式的字符/字符串，并高亮替换
            while(matcher.find()) {
                String word = matcher.group();
                String cssWord = BizConstants.Highlight_Font_LIFT + word + BizConstants.Highlight_Font_RIGHT;
                title = title.replaceAll(word,cssWord);
            }
        }
        return title;
    }

}

###实践发现上述程序还是存在问题，会替换掉css代码本身，继续优化


import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

public class FontUtils {

    /**
     * 高亮替换
     * 
     * @param keyWord 关键词
     * @param title 需替换的标题
     * @return 返回结果字符串
     * 
     */
    public static String cssTitle(String keyWord,String title) {

        if(StringUtils.isNotEmpty(keyWord)) {

            StringBuffer buffer = new StringBuffer();

            getHighlightIndex(buffer,keyWord,title);

            return buffer.toString();

        }else {

            return title;
        }

    }

    //查找方法
    private static void getHighlightIndex(StringBuffer buffer,String keyWord,String title) {

        //不区分大小写，查找首次出现位置
        int index = title.toUpperCase().indexOf(keyWord.toUpperCase());

        if(index != -1) {
            int cursorPoint = index + keyWord.length();
            //截获前段，对截取片段替换
            String startStr = title.substring(0, cursorPoint);
            buffer.append(matcherStr(keyWord,startStr));

            //获取遗留片段，继续处理
            String endStr = title.substring(cursorPoint, title.length());
            //System.err.println("endTitle="+endStr);

            if(StringUtils.isNotEmpty(endStr)) {

                getHighlightIndex(buffer,keyWord,endStr);

            }
        }else {
            //没有匹配的直接组装返回
            buffer.append(title);
        }
    }

    //替换方法
    private static String matcherStr(String keyWord,String wordStr) {
        //不区分大小写
        Pattern pattern = Pattern.compile(keyWord, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(wordStr);

        // 查找字符串中是否有匹配正则表达式的字符/字符串，并高亮替换
        while(matcher.find()) {
            String word = matcher.group();
            String cssWord = BizConstants.Highlight_Font_LIFT + word + BizConstants.Highlight_Font_RIGHT;
            wordStr = wordStr.replaceAll(word,cssWord);
        }

        return wordStr;
    }


//  public static void main(String[] args) {
//      System.out.println(FontUtils.cssTitle("t", "fgdTgftvvvfgg"));
//  }
}