如何使用java for DB connectivity从web内容文件夹读取文件

txt文件，其中我调用了所有数据库设置，如数据库名、服务器名、用户名、pwd，该文件位于web内容目录-config.txt中， 但它无法读取java类文件

公共语句myStatement（）引发异常{

    File file=new File("DBSetting.txt");
    FileInputStream fis = null;                                           // declares a file input stream
    //BufferedInputStream bis = null;
    DataInputStream dis = null;
    BufferedReader buffread=null;
    try{
        fis = new FileInputStream(file);                                   // file inputstream opens file
        dis = new DataInputStream(fis);                              // data input stream extracts data from file input stream
        buffread=new BufferedReader(new BufferedReader(new InputStreamReader(dis)));   // bufferedreader reads data from data input
        //dis = new DataInputStream(bis);
        connection=removeSpaces(buffread.readLine());    // reads data from file into variables
        port=removeSpaces(buffread.readLine());
        database=removeSpaces(buffread.readLine());
        username=removeSpaces(buffread.readLine());
        password=removeSpaces(buffread.readLine());

        System.out.println("DB Settings -:Server Name and SQL Port - " +connection+ ", Port - "+port+", DB Name - "+database+", UserName - "+username+" , PWD-"+password);

        //System.out.println(ay[ay.length-1]);
          //System.out.println(connection);
        dis.close();
    }
    catch(Exception ex){System.out.println(ex);}


    Class.forName("com.mysql.jdbc.Driver").newInstance();

    String url = "jdbc:mysql://"+connection + ":" + port + "/"+database;
    System.out.println(url);
    return DriverManager.getConnection(url, username ,password).createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);

}

public static String removeSpaces(String s) {                    // removes white spaces present in strings
  StringTokenizer st = new StringTokenizer(s," ",false);
  String t="";
  while (st.hasMoreElements()) t += st.nextElement();
  return t;
}
public static void main(String args[])throws Exception
{
    ConnectionManager con = new ConnectionManager();
    con.myStatement();
}

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}你的问题很难理解，但我想你可以在这里找到你想要的答案：

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在webcontent目录中？真正地这样，最终用户就可以通过URL打开文件。不要将此信息公开。而是把它放在类路径中。也可以将其设置为普通，这样您就不需要亲自解析文件

例如，

db.properties

：

driver=com.mysql.jdbc.driver
url=jdbc:mysql://localhost:3306/dbname
用户名=foo
密码=bar

然后，您可以按如下方式加载和获取数据：

Properties properties = new Properties();
properties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("test.properties"));
String driver = properties.getProperty("driver");
String url = properties.getProperty(url);
String username = properties.getProperty(username);
String password = properties.getProperty(password);
// ...