这是一个类的.代码如下:UserDirectory.java
import java.io.IOException;import java.io.FileOutputStream;import java.util.Enumeration;import java.util.Properties;
public class UserDirectory { private static final String UserDirectoryFile = "users.properties"; private static final String UserDirectoryHeader = "${user}=${password}";
public static UserDirectory getInstance() throws UserDirectoryException { if (null == userDirectory) { userDirectory = new UserDirectory(); } return userDirectory; } public void setUser(String userId, String password) throws UserDirectoryException { if ( (null == userId) || (null == password)) { throw new UserDirectoryException(); }try { p.put(fixId(userId), password); p.store(new FileOutputStream(UserDirectoryFile),UserDirectoryHeader); }catch (IOException e) { throw new UserDirectoryException(); } } }
import java.io.IOException;import java.io.FileOutputStream;import java.util.Enumeration;import java.util.Properties;
public class UserDirectory { private static final String UserDirectoryFile = "users.properties"; private static final String UserDirectoryHeader = "${user}=${password}";
public static UserDirectory getInstance() throws UserDirectoryException { if (null == userDirectory) { userDirectory = new UserDirectory(); } return userDirectory; } public void setUser(String userId, String password) throws UserDirectoryException { if ( (null == userId) || (null == password)) { throw new UserDirectoryException(); }try { p.put(fixId(userId), password); p.store(new FileOutputStream(UserDirectoryFile),UserDirectoryHeader); }catch (IOException e) { throw new UserDirectoryException(); } } }
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