java Matcher匹配头尾截取替换字符串的案例

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/**
 * @Author changle
 * @Time 17/10/12.
 * @Desc 匹配头尾截取替换字符串
 * 待替换内容:
 * url: jdbc:mysql://${cot.identity.db.ip}:3306/${cot.identity.db.dbname}?useUnicode=true&characterEncoding=UTF8
 * 替换后:
 * url: jdbc:mysql://{{cot.identity.db.ip}}:3306/{{cot.identity.db.dbname}}?useUnicode=true&characterEncoding=UTF8
 */
public class CommonTest {
  public static void main(String[] args) {
    String str = "url: jdbc:mysql://${cot.identity.db.ip}:3306/${cot.identity.db.dbname}?useUnicode=true&characterEncoding=UTF8";
    if (str.contains("${cot.")) {
      Pattern leftpattern = Pattern.compile("\\$\\{");
      Matcher leftmatcher = leftpattern.matcher(str);
      Pattern rightpattern = Pattern.compile("}");
      Matcher rightmatcher = rightpattern.matcher(str);
      int begin = 0;
      List<String> foundKeys = new ArrayList<>();
      while (leftmatcher.find(begin)) {
        rightmatcher.find(leftmatcher.start());
        String configKey = str.substring(leftmatcher.start(), rightmatcher.end());
        System.out.println(configKey.replace("${", "{{"));
        foundKeys.add(configKey);
        begin = rightmatcher.end();
      }
      System.out.println("原内容:"+str);
      for (String foundkey : foundKeys){
        str = str.replace(foundkey, foundkey.replace("${cot.","{{cot.").replace("}", "}}").replace("-","_"));
      }
      System.out.println("替换后:"+str);
    }
  }
}

public static void main(String[] args) { 
  String skuName="<p><span style='font-size: larger'>铅笔机一个</span></p>";
  // 生成一个Pattern,同时编译一个正则表达式
  Pattern pattern = Pattern.compile("<(.[^>]*)>");
  //匹配字符串
  Matcher matcher = pattern.matcher(skuName);
  //把符合正则的数据替换成""
  skuName=matcher.replaceAll("");
  System.out.println("替换以后结果=====》"+skuName);
}