如何清理字符串中的'$'和'/'（java）

Question

難以淨化字符串以允許$和/保留在字符串中。 （即想接受姓名/電子郵件以保持美元符號）。爲此，我試圖使用Pattern類，並試圖找到將Pattern方法放在公共字符串cutomiseText中的最佳解決方案。

public String customiseText(String bodyText, List<Object> objectList) { 
    Map<String, String> replaceKeyMap = extractMapFromList(objectList); 

    // iterate over the mapkey and return the body text replace 
    for (final String key : replaceKeyMap.keySet()) { 
     String replacementKey = "(?i)" + key; 
     String replacementValue = replaceKeyMap.get(key); 
     if (replacementValue == null) { 
      replacementValue = ""; 
     } 
     bodyText = bodyText.replaceAll(replacementKey, replacementValue); 
    } 

    return bodyText; 
} 

//代碼不工作：

//的作品原始代碼

import java.util.regex.Pattern; 

public String customiseText(String bodyText, List<Object> objectList) { 
    Map<String, String> replaceKeyMap = extractMapFromList(objectList); 
    String escapedString = Pattern.quote(bodyText); // 
    // iterate over the mapkey and return the body text replace 
    for (final String key : replaceKeyMap.keySet()) { 
     String replacementKey = "(?i)" + key; // not case sensitive and empty string matcher 
     String replacementValue = replaceKeyMap.get(key); 
     if (replacementValue == null) { 
      replacementValue = ""; 
     } 
     escapedString = escapedString.replaceAll(replacementKey, replacementValue); 
    } 

    return escapedString; 
} 

Answer 1

解決了與要回原來的代碼並添加一行消毒$ /：

// iterate over the mapkey and return the body text replace 
for (final String key : replaceKeyMap.keySet()) { 
    String replacementKey = "(?i)" + key; 
    String replacementValue = replaceKeyMap.get(key); 
    if (replacementValue == null) { 
     replacementValue = ""; 
    } 
    *replacementValue = replacementValue.replace("\\",  
     "\\\\").replace("$","\\$"); // sanitizes '$' and '\'* //only added this 
    bodyText = bodyText.replaceAll(replacementKey, replacementValue); 
} 

return bodyText; 

}

Answer 2

假設您的問題是，無論是key和value是純文本，而不是常規的expresssions，你必須逃避（又名「報價」）他們。

注意：已更改的代碼使用entrySet。

public String customiseText(String bodyText, List<Object> objectList) { 
    Map<String, String> replaceKeyMap = extractMapFromList(objectList); 

    // iterate over the mapkey and return the body text replace 
    for (Entry<String, String> entry : replaceKeyMap.entrySet()) { 
     String key = "(?i)" + Pattern.quote(entry.getKey()); 
     String value = entry.getValue(); 
     value = (value != null ? Matcher.quoteReplacement(value) : ""); 
     bodyText = bodyText.replaceAll(key, value); 
    } 
    return bodyText; 
}