Java删除properties配置文件中指定键值的代码

桃扇骨 2023-08-17 17:48 133阅读 0赞

将开发过程较好的一些内容片段记录起来，下面的内容段是关于Java删除properties配置文件中指定键值的内容。  
public static boolean deleteKeyValue4Pro(String delete\_key, String delete\_value) \{  
boolean flag = false;  
String toreplace =delete\_key + "=" + delete\_value + "n";  
try \{  
StringBuffer sb = new StringBuffer();  
String templine;  
File file = new File("ftpconfig.properties");  
BufferedReader bin = new BufferedReader(new FileReader(file));  
while ((templine = bin.readLine()) != null) \{  
templine = unicodeToString(templine);  
sb.append(templine + "n");  
\}  
String save = new String(sb.toString());  
System.out.println("before delete:n" + save + "n--------------n");  
System.out.println("delete:" + toreplace + "n--------------n");  
Pattern pattern = Pattern.compile(toreplace, Pattern.MULTILINE);  
Matcher matcher = pattern.matcher(save);  
while (matcher.find()) \{  
save = matcher.replaceAll("");  
\}  
BufferedWriter writer = new BufferedWriter(new FileWriter(file));  
String\[\] saves = save.split("n");  
for (int i = 0; i < saves.length; i++) \{  
String\[\] key\_values = saves\[i\].split("=");  
writer.write(stringToUnicode(key\_values\[0\]) + "="  
\+ key\_values\[1\] + "n");  
\}  
System.out.println("after delete:n" + save);  
writer.flush();  
bin.close();  
writer.close();  
flag = true;  
\} catch (FileNotFoundException e) \{  
e.printStackTrace();  
\} catch (IOException e) \{  
e.printStackTrace();  
\}  
return flag;  
\}

转载于:https://www.cnblogs.com/Wladybird/p/11277850.html