Java替换字符串中的内容方法

/**
 * @param str         原字符串
 * @param key         需要替换的字符串
 * @param character   符号
 * @return            替换后的字符串
 */    
public static String replace(String str,String key,String character){
    if(str.startsWith(key+character)){
        str = str.replaceFirst(key+character,"");
    }else if(str.endsWith(character+key)){
        str = str.substring(0,str.lastIndexOf(character+key));
    }else {
        str = str.replace(character+key+character, character);
    }
    return str;
}